Cisco Security Advisory: Cisco IOS Software Multicast Source Discovery Protocol Vulnerability

2012 年 3 月 30 日 - ライター翻訳版
その他のバージョン: PDFpdf | 英語版 (2012 年 3 月 28 日) | フィードバック

Advisory ID: cisco-sa-20120328-msdp

http://www.cisco.com/cisco/web/support/JP/111/1110/1110707_cisco-sa-20120328-msdp-j.html

日本語による情報は、英語による原文の非公式な翻訳であり、英語原文との間で内容の齟齬がある場合には、英語原文が優先します。

Revision 1.0

For Public Release 2012 March 28 16:00  UTC (GMT)


要約

Cisco IOS ソフトウェアおよび Cisco IOS XE ソフトウェアの Multicast Source Discovery Protocol(MSDP)実装には、認証されていないリモートの攻撃者が該当デバイスの再起動を引き起こすことのできる脆弱性が存在します。この脆弱性が繰り返し悪用されると、持続的なサービス拒否(DoS)状態になる可能性があります。
 
シスコはこの脆弱性に対処する無償のソフトウェア アップデートをリリースしました。これらの脆弱性に対しては回避策があります。このアドバイザリは、次のリンク先で確認できます。
http://www.cisco.com/cisco/web/support/JP/111/1110/1110707_cisco-sa-20120328-msdp-j.html

注:2012 年 3 月 28 日の Cisco IOS ソフトウェア セキュリティ アドバイザリ バンドル公開には 9 件の Cisco Security Advisory が含まれています。各アドバイザリには、そのアドバイザリで詳述された脆弱性を解決する Cisco IOS ソフトウェア リリース、および 2012 年 3 月 にバンドル公開したすべての脆弱性を解決する Cisco IOS ソフトウェア リリースを記載しています。

個々の公開リンクは、次のリンクにある「Cisco Event Response: Semi-Annual Cisco IOS Software Security Advisory Bundled Publication」内に掲載されています。

http://www.cisco.com/cisco/web/support/JP/111/1110/1110698_Cisco_ERP_mar12-j.html


該当製品

脆弱性が存在する製品

次の製品または機能はこの脆弱性の影響を受けます。
  • Cisco IOS ソフトウェア
  • Cisco IOS XE ソフトウェア
シスコ製品で稼働している Cisco IOS または Cisco IOS XE ソフトウェア リリースを確認するには、デバイスにログインし show version コマンドを実行してシステム バナーを表示させます。「Internetwork Operating System Software」、「Cisco IOS Software」あるいはこれらに類似するシステム バナーによってデバイスで Cisco IOS ソフトウェアが稼動していることを確認できます。その後ろにイメージ名が括弧の間に表示され、続いて「Version」と Cisco IOS ソフトウェア リリース名が表示されます。他のシスコ デバイスでは、show version コマンドがない場合や、表示が異なる場合があります。

次の例は、シスコ製品で Cisco IOS ソフトウェア リリース 12.4(20)T が稼働し、インストールされているイメージ名が C1841-ADVENTERPRISEK9-M であることを示しています。
Router#show version
Cisco IOS Software, 1841 Software (C1841-ADVENTERPRISEK9-M), Version 12.4(20)T, RELEASE SOFTWARE (fc3) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2008 by Cisco Systems, Inc. Compiled Thu 10-Jul-08 20:25 by prod_rel_team
Cisco IOS ソフトウェア リリースの命名規則の追加情報は、以下のリンクのホワイト ペーパー「Cisco IOS and NX-OS Software Reference Guide」 で確認できます。

脆弱性が存在しない製品

Cisco IOS XR ソフトウェアは、この脆弱性の影響を受けません。他のシスコ製品において、この脆弱性の影響を受けるものは現在確認されていません。

詳細

MSDP は、Multiple Protocol Independent Multicast Sparse Mode(PIM-SM)ドメインを接続するためのプロトコルです。MSDP は異なるドメインのランデブー ポイント(RP)すべてに対して、グループのマルチキャスト ソースを知らせます。RP は TCP で MSDP を実行し、マルチキャスト ソースを検出します。

PIM-SM ドメインの RP は、別のドメインの MSDP 対応ルータと MSDP ピアリング関係にあります。ピアリング関係は TCP 接続で確立され、マルチキャスト グループへ送信されるソースのリストが主に交換されます。RP 間の TCP 接続は、基盤となるルーティング システムで確立されます。受信側の RP はソース リストを使ってソース パスを確立します。

このトポロジーの目的は、あるドメインから別のドメインにあるマルチキャスト ソースを検出できるようにすることです。あるマルチキャスト ソースが受信側の存在するドメインと関係がある場合、マルチキャスト データは PIM-SM の通常のソースツリー作成メカニズムを通じて送信されます。

該当デバイスは、MSDP 設定の外部ピア ルータからカプセル化されたインターネット グループ管理プロトコル(IGMP)データを含む MSDP パケットを受信すると、再起動が引き起こされる可能性があります。この脆弱性は、ルータがマルチキャスト グループへ明示的に参加している場合のみ、不正利用できます。MSDP パケットの宛先アドレスはユニキャスト アドレスで、ループバック アドレスを含むすべての IP アドレスに送信することができます。

機器を通過するトラフィックは、この脆弱性のトリガーとはなりません。

脆弱性が存在するインターフェイス設定には、明示的に参加するマルチキャスト グループが含まれています。この脆弱性の不正利用が可能となるいくつかの設定例を示します。


!--- SAP リスナー サポート向けに設定されたインターフェイス(一般的なマルチキャスト グループ)

interface GigabitEthernet0/0
ip address 192.168.0.1 255.255.255.0
ip pim sparse-mode
ip sap listen

!--- マルチキャスト グループへの参加が設定されたインターフェイス

interface GigabitEthernet0/0 ip address 192.168.0.1 255.255.255.0 ip pim sparse-mode ip igmp join-group 224.2.127.254

このほか、show igmp interface コマンドを使ってインターフェイスがマルチキャスト グループに参加しているかどうかを確認できます。

RouterA#show ip igmp interface 
GigabitEthernet0/0 is up, line protocol is up
  Internet address is 192.168.0.1/24
  IGMP is enabled on interface
  Current IGMP host version is 2
  Current IGMP router version is 2
  IGMP query interval is 60 seconds
  IGMP querier timeout is 120 seconds
  IGMP max query response time is 10 seconds
  Last member query count is 2
  Last member query response interval is 1000 ms
  Inbound IGMP access group is not set
  IGMP activity: 2 joins, 0 leaves
  Multicast routing is disabled on interface
  Multicast TTL threshold is 0
  Multicast groups joined by this system (number of users):
      224.2.127.254(2)  239.255.255.255(1)

この脆弱性は、Cisco Bug ID CSCtr28857登録ユーザ専用)に記載されています。この脆弱性に対して Common Vulnerabilities and Exposures(CVE)ID CVE-2012-0382 が割り当てられています。

脆弱性スコア詳細

シスコはこのアドバイザリでの脆弱性に対して Common Vulnerability Scoring System(CVSS)に基づいたスコアを提供しています。このセキュリティ アドバイザリでの CVSS スコアは CVSS バージョン 2.0 に基づいています。

CVSS は、脆弱性の重要度を示唆するもので、緊急性および対応の優先度を決定する組織の手助けとなる標準ベースの評価法です。

シスコは基本評価スコア(Base Score)および現状評価スコア(Temporal Score)を提供しています。お客様はこれらを用いて環境評価スコア(Environmental Score)を算出し、自身のネットワークにおける脆弱性の影響度を導き出すことができます。

シスコは次のリンクで CVSS に関する追加情報を提供しています。

http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html

また、シスコは個々のネットワークにおける環境影響度を算出する CVSS 計算ツールを次のリンクで提供しています。

http://tools.cisco.com/security/center/cvssCalculator.x



CSCtr28857 MSDP-peered Router joined to a multicast group may crash

Calculate the environmental score of CSCtr28857

CVSS Base Score - 7.1

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Medium

None

None

None

Complete

CVSS Temporal Score - 5.9

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed

影響

この脆弱性が悪用されると、該当するデバイスが再起動する可能性があります。この脆弱性が繰り返し悪用されると、継続的な DoS 状態となる可能性があります。

ソフトウェア バージョンおよび修正

ソフトウェアのアップグレードを検討する場合は、http://www.cisco.com/go/psirt/ の Cisco Security Advisories and Responses アーカイブと、後続のアドバイザリを参照して、起こりうる障害と完全なアップグレード ソリューションを判断してください。

いずれの場合も、アップグレードするデバイスに十分なメモリがあること、および現在のハードウェアとソフトウェアの構成が新しいリリースで引き続き適切にサポートされていることの確認を十分に行ってください。情報が不明確な場合は、Cisco Technical Assistance Center(TAC)もしくは契約しているメンテナンス プロバイダーにお問い合わせください。

Cisco IOS ソフトウェア

Cisco IOS ソフトウェア テーブル(下記)の各行は Cisco IOS ソフトウェア トレインを示します。あるトレインが脆弱である場合、修正を含む最初のリリースは「First Fixed Release」列に示されます。「First Fixed Release for All Advisories in the March 2012 Bundled Publication」列は、その Cisco IOS ソフトウェア セキュリティ アドバイザリ バンドル公開で公開済みであるすべての脆弱性を修正する最初のリリースを示します。シスコは利用可能な最新のリリースへのアップグレードを推奨します。

Cisco IOS ソフトウェア チェッカーを利用して特定の Cisco IOS ソフトウェア リリースに対応したシスコのセキュリティ アドバイザリを検索することができます。このツールは次の Cisco Security Intelligence Operations(SIO)ポータルで入手できます。http://tools.cisco.com/security/center/selectIOSVersion.x

Major Release      Availability of Repaired Releases
Affected 12.0-Based Releases First Fixed Release First Fixed Release for All Advisories in the March 2012 Cisco IOS Software Security Advisory Bundled Publication
12.0S 12.0(33)S10
12.0(33)S10
12.0SY 12.0(32)SY15
12.0(32)SY15
12.0SZ Vulnerable; First fixed in Release 12.0S
Vulnerable; First fixed in Release 12.0S
Affected 12.2-Based Releases First Fixed Release First Fixed Release for All Advisories in the March 2012 Cisco IOS Software Security Advisory Bundled Publication
12.2 Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2B Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2BC Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2BW Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2BX Vulnerable; First fixed in Release 12.2SB
Vulnerable; First fixed in Release 12.2SB
12.2BY Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2BZ Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2CX Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2CY Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2CZ Vulnerable; First fixed in Release 12.0S
Vulnerable; First fixed in Release 12.0S
12.2DA Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2DD Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2DX Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2EU Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2EW Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2EWA Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2EX Vulnerable; First fixed in Release 15.0SE
Vulnerable; First fixed in Release 15.0SE
12.2EY 12.2(52)EY4
12.2(58)EY2
12.2(52)EY4
12.2EZ Releases prior to 12.2(53)EZ are vulnerable; Releases 12.2(53)EZ and later are not vulnerable.First fixed in Release 15.0SE
Vulnerable; First fixed in Release 15.0SE
12.2FX Not vulnerable
Vulnerable; First fixed in Release 15.0SE
12.2FY Not vulnerable
Vulnerable; First fixed in Release 15.0SE
12.2FZ Vulnerable; First fixed in Release 12.2SE
Vulnerable; First fixed in Release 15.0SE
12.2IRA Vulnerable; First fixed in Release 12.2SRE
Vulnerable; First fixed in Release 12.2SRE
12.2IRB Vulnerable; First fixed in Release 12.2SRE
Vulnerable; First fixed in Release 12.2SRE
12.2IRC Vulnerable; First fixed in Release 12.2SRE
Vulnerable; First fixed in Release 12.2SRE
12.2IRD Vulnerable; First fixed in Release 12.2SRE
Vulnerable; First fixed in Release 12.2SRE
12.2IRE Vulnerable; First fixed in Release 12.2SRE
Vulnerable; First fixed in Release 12.2SRE
12.2IRF Vulnerable; First fixed in Release 12.2SRE
Vulnerable; First fixed in Release 12.2SRE
12.2IRG Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IRH 12.2(33)IRH1
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IXA Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IXB Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IXC Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IXD Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IXE Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IXF Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IXG Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IXH Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2JA Not vulnerable
Not vulnerable
12.2JK Not vulnerable
Not vulnerable
12.2MB Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2MC Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2MRA Vulnerable; First fixed in Release 12.2SRE
Vulnerable; First fixed in Release 12.2SRE
12.2MRB Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2S Releases prior to 12.2(30)S are vulnerable; Releases 12.2(30)S and later are not vulnerable.First fixed in Release 12.0S
Releases prior to 12.2(30)S are vulnerable; Releases 12.2(30)S and later are not vulnerable.First fixed in Release 12.0S
12.2SB 12.2(33)SB12
12.2(33)SB12
12.2SBC Vulnerable; First fixed in Release 12.2SB
Vulnerable; First fixed in Release 12.2SRE
12.2SCA Vulnerable; First fixed in Release 12.2SCE
Vulnerable; First fixed in Release 12.2SCE
12.2SCB Vulnerable; First fixed in Release 12.2SCE
Vulnerable; First fixed in Release 12.2SCE
12.2SCC Vulnerable; First fixed in Release 12.2SCE
Vulnerable; First fixed in Release 12.2SCE
12.2SCD Vulnerable; First fixed in Release 12.2SCE
Vulnerable; First fixed in Release 12.2SCE
12.2SCE 12.2(33)SCE5
12.2(33)SCE6
12.2SCF 12.2(33)SCF2
12.2(33)SCF2
12.2SE 12.2(55)SE5

12.2(55)SE5 *
12.2SEA Vulnerable; First fixed in Release 12.2SE
Vulnerable; First fixed in Release 15.0SE
12.2SEB Vulnerable; First fixed in Release 12.2SE
Vulnerable; First fixed in Release 15.0SE
12.2SEC Vulnerable; First fixed in Release 12.2SE
Vulnerable; First fixed in Release 15.0SE
12.2SED Vulnerable; First fixed in Release 12.2SE
Vulnerable; First fixed in Release 15.0SE
12.2SEE Vulnerable; First fixed in Release 12.2SE
Vulnerable; First fixed in Release 15.0SE
12.2SEF Not vulnerable
Vulnerable; First fixed in Release 15.0SE
12.2SEG Releases prior to 12.2(25)SEG4 are vulnerable; Releases 12.2(25)SEG4 and later are not vulnerable.First fixed in Release 15.0SE
Vulnerable; First fixed in Release 15.0SE
12.2SG 12.2(53)SG7; Available on 07-MAY-12
12.2(53)SG7; Available on 07-MAY-12
12.2SGA Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SL Not vulnerable
Not vulnerable
12.2SM Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SO Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SQ Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SRA Vulnerable; First fixed in Release 12.2SRE
Vulnerable; First fixed in Release 12.2SRE
12.2SRB Vulnerable; First fixed in Release 12.2SRE
Vulnerable; First fixed in Release 12.2SRE
12.2SRC Vulnerable; First fixed in Release 12.2SRE
Vulnerable; First fixed in Release 12.2SRE
12.2SRD Vulnerable; First fixed in Release 12.2SRE
Vulnerable; First fixed in Release 12.2SRE
12.2SRE 12.2(33)SRE5
12.2(33)SRE6
12.2STE Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SU Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2SV Releases up to and including 12.2(18)SV2 are not vulnerable.
Releases up to and including 12.2(18)SV2 are not vulnerable.
12.2SVA Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SVC Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SVD Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SVE Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SW Vulnerable; First fixed in Release 12.4SW
Vulnerable; First fixed in Release 12.4T
12.2SX Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXA Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXB Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXD Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXE Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXF Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXH Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXI 12.2(33)SXI9
12.2(33)SXI9
12.2SXJ 12.2(33)SXJ2
12.2(33)SXJ2
12.2SY 12.2(50)SY2; Available on 11-JUN-12
12.2(50)SY2; Available on 11-JUN-12
12.2SZ Vulnerable; First fixed in Release 12.0S
Vulnerable; First fixed in Release 12.0S
12.2T Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2TPC Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2XA Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XB Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XC Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XD Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XE Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XF Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XG Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XH Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XI Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XJ Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XK Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XL Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XM Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XNA Please see Cisco IOS-XE Software Availability
Please see Cisco IOS-XE Software Availability
12.2XNB Please see Cisco IOS-XE Software Availability
Please see Cisco IOS-XE Software Availability
12.2XNC Please see Cisco IOS-XE Software Availability
Please see Cisco IOS-XE Software Availability
12.2XND Please see Cisco IOS-XE Software Availability
Please see Cisco IOS-XE Software Availability
12.2XNE Please see Cisco IOS-XE Software Availability
Please see Cisco IOS-XE Software Availability
12.2XNF Please see Cisco IOS-XE Software Availability
Please see Cisco IOS-XE Software Availability
12.2XO Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2XQ Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XR Releases prior to 12.2(15)XR are vulnerable; Releases 12.2(15)XR and later are not vulnerable.First fixed in Release 12.4
Releases prior to 12.2(15)XR are vulnerable; Releases 12.2(15)XR and later are not vulnerable.First fixed in Release 15.0M
12.2XS Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XT Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XU Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XV Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2XW Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2YA Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2YC Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YD Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YE Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YK Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YO Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YP Vulnerable; First fixed in Release 12.4
Releases up to and including 12.2(8)YP are not vulnerable.
Vulnerable; First fixed in Release 15.0M
Releases up to and including 12.2(8)YP are not vulnerable.
12.2YT Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YW Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YX Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YY Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YZ Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZA Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZB Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZC Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZD Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZE Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2ZH Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.2ZJ Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZP Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZU Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZX Vulnerable; First fixed in Release 12.2SB
Vulnerable; First fixed in Release 12.2SRE
12.2ZY Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZYA Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Affected 12.3-Based Releases First Fixed Release First Fixed Release for All Advisories in the March 2012 Cisco IOS Software Security Advisory Bundled Publication
12.3 Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3B Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3BC Vulnerable; First fixed in Release 12.2SCE
Vulnerable; First fixed in Release 12.2SCE
12.3BW Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3JA Releases prior to 12.3(4)JA2 are vulnerable; Releases 12.3(4)JA2 and later are not vulnerable.Migrate to any release in 12.4JA
Vulnerable; First fixed in Release 12.4JA
12.3JEA Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3JEB Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3JEC Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3JED Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3JK Releases up to and including 12.3(2)JK3 are not vulnerable.
Releases 12.3(8)JK1 and later are not vulnerable.First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3JL Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3JX Not vulnerable
Not vulnerable
12.3T Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3TPC Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3VA Not vulnerable
Not vulnerable
12.3XA Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3XB Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3XC Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3XD Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3XE Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3XF Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3XG Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3XI Vulnerable; First fixed in Release 12.2SB
Vulnerable; First fixed in Release 12.2SRE
12.3XJ Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3XK Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3XL Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3XQ Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3XR Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3XU Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 12.4T
12.3XW Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3XX Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3XY Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3XZ Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3YD Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YF Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YG Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YI Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YJ Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YK Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YM Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YQ Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YS Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YT Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YU Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YX Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YZ Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3ZA Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
Affected 12.4-Based Releases First Fixed Release First Fixed Release for All Advisories in the March 2012 Cisco IOS Software Security Advisory Bundled Publication
12.4 12.4(25g); Available on 19-SEP-12
Vulnerable; First fixed in Release 15.0M
12.4GC Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JA Not vulnerable
12.4(23c)JA4
12.4(25e)JA
12.4JAX Not vulnerable
Vulnerable; First fixed in Release 12.4JA
12.4JDA Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JDC Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JDD Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JDE Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JHA Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JHB Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JHC Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JK Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JL Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JX Not vulnerable
Vulnerable; First fixed in Release 12.4JA
12.4JY Not vulnerable
Vulnerable; First fixed in Release 12.4JA
12.4JZ Not vulnerable
Vulnerable; First fixed in Release 12.4JA
12.4MD 12.4(24)MD7; Available on 29-Jun-12
12.4(22)MD3; Available on 30-MAR-12
12.4MDA 12.4(24)MDA11
12.4(24)MDA11
12.4MDB 12.4(24)MDB5a
12.4(24)MDB5a
12.4MDC Not vulnerable
Not vulnerable
12.4MR Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4MRA Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4MRB Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4SW 12.4(15)SW8a
Vulnerable; First fixed in Release 15.0M
12.4T 12.4(15)T17
12.4(24)T7

12.4(15)T17
12.4(24)T7

12.4XA Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XB Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 12.4T
12.4XC Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XD Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XE Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XF Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XG Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XJ Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XK Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XL Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4XM Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XN Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4XP Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4XQ Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XR Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 12.4T
12.4XT Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XV Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4XW Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XY Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XZ Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4YA Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4YB Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4YD Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4YE 12.4(24)YE3d
12.4(24)YE3d
12.4YG 12.4(24)YG4
12.4(24)YG4
Affected 15.0-Based Releases First Fixed Release First Fixed Release for All Advisories in the March 2012 Cisco IOS Software Security Advisory Bundled Publication
15.0M 15.0(1)M8
15.0(1)M8
15.0MR Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
15.0MRA Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
15.0S 15.0(1)S5
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
15.0(1)S5
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
15.0SA Not vulnerable
Not vulnerable
15.0SE 15.0(1)SE1
15.0(2)SE; Available on 06-AUG-12
15.0(1)SE1
15.0SG 15.0(2)SG2
Cisco IOS XE devices: Please see Cisco IOS-XE Software Availability
15.0(2)SG2
Cisco IOS XE devices: Please see Cisco IOS-XE Software Availability
15.0SY Not vulnerable
15.0(1)SY1
15.0XA Vulnerable; First fixed in Release 15.1T
Vulnerable; First fixed in Release 15.1T
15.0XO Cisco IOS XE devices: Please see Cisco IOS-XE Software Availability
Cisco IOS XE devices: Please see Cisco IOS-XE Software Availability
Affected 15.1-Based Releases First Fixed Release First Fixed Release for All Advisories in the March 2012 Cisco IOS Software Security Advisory Bundled Publication
15.1EY 15.1(2)EY1a
15.1(2)EY2
15.1GC 15.1(2)GC2
15.1(2)GC2
15.1M 15.1(4)M2
15.1(4)M3a
15.1(4)M4; Available on 30-MAR-12
15.1MR 15.1(1)MR3
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
15.1S 15.1(3)S1
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
15.1(3)S2
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
15.1SG Not vulnerable
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
Not vulnerable
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
15.1SNG Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
15.1SNH Not vulnerable
Not vulnerable
15.1T 15.1(1)T5; Available on 18-MAY-12
15.1(2)T5; Available on 27-APR-12
15.1(3)T3
15.1(3)T3
15.1XB Vulnerable; First fixed in Release 15.1T
Vulnerable; First fixed in Release 15.1T
Affected 15.2-Based Releases First Fixed Release First Fixed Release for All Advisories in the March 2012 Cisco IOS Software Security Advisory Bundled Publication
15.2GC 15.2(1)GC1
15.2(1)GC2
15.2S Not vulnerable
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
15.2(1)S1
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
15.2T 15.2(1)T1
15.2(2)T
15.2(2)T1
15.2(1)T2
15.2(2)T1
15.2(3)T; Available on 30-MAR-12

* Cisco Catalyst 3550 シリーズ スイッチは Internet Key Exchange(IKE; インターネット キー エクスチェンジ)機能をサポートしており、デバイスがレイヤ 3 イメージを実行しているとき Cisco bug ID CSCts38429 の脆弱性に該当します。ただし、この製品はソフトウェア メンテナンス終了となっています。レイヤ 2 イメージを実行している Cisco 3550 シリーズ SMI スイッチは IKE をサポートしておらず、この脆弱性に該当しません。12.2SE ベースのソフトウェアを稼動しているほかのシスコ デバイスはこの脆弱性に該当しません。

Cisco IOS XE ソフトウェア

Cisco IOS XE ソフトウェアは、このアドバイザリで説明されている脆弱性の影響を受けます。
Cisco IOS XE Software Release First Fixed Release First Fixed Release for All Advisories in the March 2012 Cisco IOS Software Security Advisory Bundled Publication
2.1.x Vulnerable; migrate to 3.4.1S or later. Vulnerable; migrate to 3.4.2S or later.
2.2.x Vulnerable; migrate to 3.4.1S or later. Vulnerable; migrate to 3.4.2S or later.
2.3.x Vulnerable; migrate to 3.4.1S or later. Vulnerable; migrate to 3.4.2S or later.
2.4.x Vulnerable; migrate to 3.4.1S or later. Vulnerable; migrate to 3.4.2S or later.
2.5.x Vulnerable; migrate to 3.4.1S or later. Vulnerable; migrate to 3.4.2S or later.
2.6.x Vulnerable; migrate to 3.4.1S or later. Vulnerable; migrate to 3.4.2S or later.
3.1.xS Vulnerable; migrate to 3.4.1S or later. Vulnerable; migrate to 3.4.2S or later.
3.1.xSG Vulnerable; migrate to 3.2.2SG or later. Vulnerable; migrate to 3.2.2SG or later.
3.2.xS Vulnerable; migrate to 3.4.1S or later. Vulnerable; migrate to 3.4.2S or later.
3.2.xSG 3.2.2SG 3.2.2SG
3.3.xS Vulnerable; migrate to 3.4.1S or later. Vulnerable; migrate to 3.4.2S or later.
3.3.xSG Not Vulnerable Not Vulnerable
3.4.xS 3.4.1S 3.4.2S
3.5.xS Not vulnerable 3.5.1S
3.6.xS Not vulnerable Not vulnerable

Cisco IOS XE ソフトウェア リリースと Cisco IOS ソフトウェア リリースのマッピングについては、『Cisco IOS XE 2 Release Notes』、『Cisco IOS XE 3S Release Notes』、『Cisco IOS XE 3SG Release Notes』を参照してください。

Cisco IOS XR ソフトウェア

Cisco IOS XR ソフトウェアは、2012 年 3 月の Cisco IOS Software Security Advisory バンドル公開に含まれている脆弱性の影響を受けません。


回避策

MSDP 設定のルータでマルチキャスト グループのメンバシップが不要な場合は、ip sap listen または ip igmp join-group <マルチキャスト グループのアドレス> コマンドをルータ インターフェイスから削除して回避できます。

次に例を示します。

  RouterA#conf t
    RouterA(config)# interface GigabitEthernet0/0
    RouterA(config-if)# no ip sap listen
    RouterA(config-if)# no ip igmp join-group 224.2.127.254
  interface GigabitEthernet0/0
  ip address 192.168.0.1 255.255.255.0
  ip pim sparse-mode

ルータに MSDP ピアが設定されているかを確認するには、ルータのコマンド プロンプトで show ip msdp peer コマンドを実行します。

RouterA# show ip msdp peer
MSDP Peer 192.168.0.2 (?), AS 100
  Connection status:
    State: Up, Resets: 0, Connection source: none configured
    Uptime(Downtime): 01:23:42, Messages sent/received: 25/24
    Output messages discarded: 0
    Connection and counters cleared 01:15:14 ago
  SA Filtering:
    Input (S,G) filter: none, route-map: none
    Input RP filter: none, route-map: none
    Output (S,G) filter: none, route-map: none
    Output RP filter: none, route-map: none
  SA-Requests:
    Input filter: none
  Peer ttl threshold: 0
  SAs learned from this peer: 0
    Input queue size: 0, Output queue size: 0
  Message counters:
    RPF Failure count: 0
    SA Messages in/out: 13/8
    SA Requests in: 0
SA Responses out: 0   
Data Packets in/out: 7/8
信頼できない MSDP ピアを設定から削除するには、ルータの設定インターフェイスで no ip msdp peer <アドレス> または ip msdp default-peer <IP アドレス | 名前> コマンドを実行します。

RouterA(config)# no ip msdp peer 192.168.0.2
interface GigabitEthernet0/0
 ip address 192.168.0.1 255.255.255.0
 ip pim sparse-mode

修正済みソフトウェアの入手

シスコはこのアドバイザリに記載された脆弱性に対処する無償のソフトウェア アップデートを提供しています。ソフトウェアの導入を行う前に、お客様のメンテナンス プロバイダーにご相談いただくか、ソフトウェアのフィーチャ セットの互換性およびお客様のネットワーク環境に特有の問題に関してご確認ください。

お客様がインストールしたりサポートを受けたりできるのは、ご購入いただいたフィーチャ セットに対してのみとなります。ソフトウェア アップグレードをインストール、ダウンロード、アクセス、またはその他の方法で使用した場合、お客様は http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html または http://www.cisco.com/public/sw-center/sw-usingswc.shtml に記載のシスコのソフトウェア ライセンスの条項に従うことに同意したことになります。

ソフトウェアのアップグレードに関し、psirt@cisco.com もしくは security-alert@cisco.com にお問い合わせいただくことはご遠慮ください。

サービス契約をご利用のお客様

サービス契約をご利用のお客様は、通常のアップデート チャネルからアップグレード ソフトウェアを入手してください。ほとんどのお客様は、Cisco.com の Software Center からアップグレードを入手することができます。http://www.cisco.com

サードパーティのサポート会社をご利用のお客様

シスコ パートナー、正規販売代理店、サービス プロバイダーなど、サードパーティのサポート会社と以前に契約していたか、または現在契約しており、その会社からシスコ製品の提供または保守を受けているお客様は、該当するサポート会社に連絡し、適切な処置について支援を受けてください。

回避策の効果は、使用製品、ネットワーク トポロジー、トラフィックの性質や組織の目的などのお客様の状況に依存します。影響製品およびリリースが多種多様であるため、回避策を実際に展開する前に、対象とするネットワークで適用する回避策または修正が最適であるか、お客様のサービス プロバイダーやサポート会社にご相談ください。

サービス契約をご利用でないお客様

シスコから直接購入したがシスコのサービス契約をご利用いただいていない場合、また、サードパーティ ベンダーから購入したが修正済みソフトウェアを購入先から入手できない場合は、Cisco Technical Assistance Center(TAC)に連絡してアップグレードを入手してください。

  • +1 800 553 2447(北米内からのフリー ダイヤル)
  • +1 408 526 7209(北米以外からの有料通話)
  • 電子メール:tac@cisco.com

無償アップグレードの対象であることをご証明いただくために、製品のシリアル番号と、このアドバイザリの URL をご用意ください。サービス契約をご利用でないお客様は TAC を通して無償アップグレードをお求めください。

さまざまな言語向けの各地の電話番号、説明、電子メール アドレスなどの、この他の TAC の連絡先情報については、シスコ ワールドワイドお問い合わせ先を参照してください。http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html

不正利用事例と公式発表

Cisco Product Security Incident Response Team(PSIRT)では、本アドバイザリに記載されている脆弱性の不正利用事例とその公表は確認しておりません。

この脆弱性は、お客様からのお問い合わせへの対応の際に発見されました。

この通知のステータス:FINAL

本アドバイザリは無保証のものとしてご提供しており、いかなる種類の保証を示唆するものでもありません。本アドバイザリの情報およびリンクの使用に関する責任の一切はそれらの使用者にあるものとします。またシスコシステムズはいつでも本ドキュメントの変更や更新を実施する権利を有します。

後述する情報配信の URL を省略し、本アドバイザリの記述内容に関して単独の転載や意訳を実施した場合には、事実誤認ないし重要な情報の欠落を含む統制不可能な情報の伝搬が行われる可能性があります。


情報配信

このアドバイザリは次のリンクにある Cisco Security Intelligence Operations に掲載されます。

http://www.cisco.com/cisco/web/support/JP/111/1110/1110707_cisco-sa-20120328-msdp-j.html

また、このアドバイザリのテキスト版が Cisco PSIRT PGP キーによるクリア署名つきで次の電子メールで配信されています。

  • cust-security-announce@cisco.com
  • first-bulletins@lists.first.org
  • bugtraq@securityfocus.com
  • vulnwatch@vulnwatch.org
  • cisco@spot.colorado.edu
  • cisco-nsp@puck.nether.net
  • full-disclosure@lists.grok.org.uk

このアドバイザリに関する今後の更新があれば、Cisco.com に掲載されますが、メーリング リストで配信されるとは限りません。このアドバイザリの URL で更新をご確認いただくことができます。


更新履歴

Revision 1.0 2012-March-28 Initial public release

シスコ セキュリティ手順

シスコ製品におけるセキュリティの脆弱性の報告、セキュリティ事故に関する支援、およびシスコからセキュリティ情報を入手するための登録方法について詳しく知るには、Cisco.com の http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html にアクセスしてください。この Web ページには、シスコのセキュリティ アドバイザリに関してメディアが問い合わせる際の指示が掲載されています。すべてのシスコ セキュリティ アドバイザリは、http://www.cisco.com/go/psirt/ で確認することができます。