Cisco Security Advisory: Cisco IOS Software H.323 Denial of Service Vulnerabilities

2010 年 3 月 24 日 - ライター翻訳版
その他のバージョン: PDFpdf | 英語版 (2010 年 3 月 24 日) | フィードバック


Advisory ID: cisco-sa-20100324-h323

http://www.cisco.com/JP/support/public/ht/security/107/1076226/cisco-sa-20100324-h323-j.shtml

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 1.1

Last Updated 2010 March 26 1700 UTC (GMT)

For Public Release 2010 March 24 1600 UTC (GMT)


要約

Cisco IOS ソフトウェアの H.323 の実装には 2 つの脆弱性が存在します。これらがリモートから不正利用されると、脆弱性の存在する Cisco IOS ソフトウェアが稼働しているデバイス上で Denial of Service(DoS; サービス拒否)状態が引き起こされる可能性があります。

シスコはこれらの脆弱性に対応するための無償ソフトウェア アップデートを提供しています。脆弱性が存在するデバイスで H.323 を実行しなくてもよい場合に、H.323 を無効にする以外には、この脆弱性に対する緩和策はありません。

このアドバイザリは次のリンクに掲載されます。 http://www.cisco.com/JP/support/public/ht/security/107/1076226/cisco-sa-20100324-h323-j.shtml

注:2010 年 3 月 24 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 7 件の Security Advisory が含まれています。これらのアドバイザリはすべて、Cisco IOS ソフトウェアの脆弱性に対処するものです。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リリースを記載しています。2010 年 3 月 24 日およびそれ以前に公開された全ての Cisco IOS ソフトウェアの脆弱性に対応したリリースについては、次のリンクにあるテーブルをご参照下さい。

http://www.cisco.com/JP/support/public/ht/security/107/1076221/cisco-sa-20100324-bundle-j.shtml

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

http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_mar10.html

該当製品

この脆弱性の影響を受けるのは、H.323 音声サービスをイネーブルにした Cisco IOS ソフトウェアを実行しているデバイスだけです。

脆弱性が存在する製品

該当する Cisco IOS ソフトウェア バージョンが実行されているシスコ デバイスで H.323 メッセージを処理するよう設定されている場合は、これらの脆弱性の影響を受けます。デフォルトでは、H.323 はイネーブルではありません。

Cisco IOS ソフトウェア デバイスが H.323 サービスを実行しているか判断するには、show process cpu | include 323 コマンドを実行します。次に例を示します。

Router#show process cpu | include 323
 249       16000           3       5333  0.00%  0.00%  0.00%   0 CCH323_CT
 250           0           1          0  0.00%  0.00%  0.00%   0 CCH323_DNS
Router# 

前述の例では、デバイス上でプロセス CCH323_CT と CCH323_DNS が実行されていて、デバイスは H.323 メッセージをリスニングしています。これらのプロセス(または同様のプロセス)がアクティブになっている限り、デバイスには脆弱性が存在します。

注:ポート TCP 1720 での H.323 のリスニングのみが該当します。

シスコ製品で稼働している Cisco IOS 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。「Cisco 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 ソフトウェアが稼働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、続いてバージョンと 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 IOS ソフトウェア リリース 12.3(26) が稼動し、インストールされているイメージ名が C2500-IS-L であることを示しています。

Router#show version
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-IS-L), Version 12.3(26), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by cisco Systems, Inc.
Compiled Mon 17-Mar-08 14:39 by dchih



!--- output truncated

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 が稼動し、そのイメージ名が 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



!--- output truncated

Cisco IOS ソフトウェアのリリース命名規則の追加情報は次のリンクの「White Paper:Cisco IOS Reference Guide」で確認できます。 http://www.cisco.com/web/about/security/intelligence/ios-ref.html

脆弱性が存在しない製品

Cisco IOS XR ソフトウェアは、これら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アドバイザリの影響を受けるものは、現在確認されていません。

詳細

H.323 は、リアルタイムのマルチメディア通信およびパケットベース(IP)のネットワーク会議の ITU 標準です。H.323 標準のサブセットは H.225.0 で、コール シグナリング プロトコルや IP ネットワーク上でのメディア ストリームのパケット化に使用される標準です。

Cisco IOS ソフトウェアの H.323 の実装には、2 つの Dos 脆弱性があります。Cisco IOS ソフトウェア実行中の影響を受けるデバイスに対して、巧妙に細工した H.323 パケットをリモートから送信することにより、攻撃者がこれらの脆弱性を不正利用できます。これらの脆弱性を不正利用するには、TCP 3 ウェイ ハンドシェイクが必要です。

脆弱性が不正利用されると、最初の脆弱性によりインターフェイス キュー ウェッジが発生します。2 番目の脆弱性によりメモリ リークが発生し、ほとんどの場合、デバイスが再起動されます。

インターフェイス キュー ウェッジとは、Cisco IOS ルータやスイッチが特定のパケットを受信してキューに格納した際に、処理エラーによってキューからパケットを削除できなくなるという脆弱性クラスの 1 つです。

受信したパケットは、比較的サイズの小さい限定されたインターフェイス入力キューに対してカウントされます。たとえば、ほとんどのプラットフォームのインターフェイス タイプで、デフォルトのインターフェイス入力キューは 75 パケットです。この値は、インターフェイス コンフィギュレーション コマンドで hold-queue 値を使用して設定できます。不具合によってキューから取り出すことができないパケットで入力キューがいっぱいになった状態のことを、キューがウェッジ状態になったといいます。最近では、この状態のことを「ブロックされたインターフェイス」ともいいます。

この状態は、入力キューのサイズが入力キューの最大値またはそれ以上(Cisco IOS ソフトウェアリリースによって異なります)になった場合に Cisco IOS デバイスで発生します。この例を次に示します。この例では、入力キューの現在のサイズは 75 で、入力キューの最大サイズである 75 と同じになっています。

Router#show interface Ethernet 0/0
Ethernet0/0 is up, line protocol is up
  Hardware is AmdP2, address is 0001.0001.0001
  Internet address is 10.1.1.100/24
  MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:20, output 00:00:05, output hang never
  Last clearing of "show interface" counters never
  Input queue: 75/75/44/0 (size/max/drops/flushes);
 Total output drops: 0
  Queueing strategy: fifo


  Output queue: 0/40 (size/max)
  5 minute input rate 4000 bits/sec, 9 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     2937 packets input, 182298 bytes, 0 no buffer
     Received 7 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 input packets with dribble condition detected
     58 packets output, 6540 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out

キュー ウェッジと、Cisco IOS ソフトウェア上でブロックされたインターフェイスを特定するのに使用可能ないくつかの検出メカニズムの詳細については(専用の EEM スクリプトと、SNMP を使用してこの状態を検出する方法に関するホワイトペーパーを含む)、次のリンクを参照してください: http://blogs.cisco.com/security/comments/cisco_ios_queue_wedges_explained/

検出されたメモリ リークを表示するには、特権 EXEC モードで show memory debug leaks コマンドを使用します。

Router#show memory debug leaks
Adding blocks for GD...

                 I/O memory


Address    Size   Alloc_pc  PID  Alloc-Proc       Name

                 Processor memory


Address    Size   Alloc_pc  PID  Alloc-Proc       Name
640854D4     1940 622265A4  196  CCH323_CT       CCH323_CT
640EA5E8     1940 622265A4  196  CCH323_CT       CCH323_CT
65961B38     1940 622265A4  196  CCH323_CT       CCH323_CT

上記の例は、プロセス CCH323_CT でのメモリ リークを示しています。 show memory debug leaks コマンドは、Cisco IOS ソフトウェア バージョン 12.3(8)T1 および 12.2(25)S で導入されました。

caution 注: すべての show memory debug コマンドの実環境での実行は、 メモリ枯渇が発生した際にルータでのメモリリークを解析するためだけに行われなければなりません。 これらのコマンドは CPU使用率の高騰と遅延に敏感なプロトコルでの障害の原因となりえます。 これらのコマンドは機器が余裕のある環境に設置されているのでないなら、メンテナンス ウィンドウにおいて使用することが推奨されます。

これらの脆弱性は、Cisco Bug ID CSCta19962 登録ユーザのみ および CSCtb93855 登録ユーザのみ) として文書化され、CVE ID として CVE-2010-0582 および CVE-2010-0583 が割り当てられています。

脆弱性スコアの詳細

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、個々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 URL にて CVSS に関する FAQ 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 URL にて提供しています。

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

CSCta19962 - Interface queue wedge experienced when sending crafted H.323 packets

Calculate the environmental score of CSCta19962

CVSS Base Score - 7.8

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

None

None

None

Complete

CVSS Temporal Score - 6.4

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed

CSCtb93855 - Memory leak after receiving H.323 crafted packets

Calculate the environmental score of CSCtb93855

CVSS Base Score - 7.8

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

None

None

None

Complete

CVSS Temporal Score - 6.4

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed

影響

本アドバイザリに記載された脆弱性の不正利用に成功した場合、影響を受けたデバイスでインターフェイス キュー ウェッジまたは再起動が発生することがあります。またこれらの脆弱性が繰り返し不正利用されることにより、長時間にわたって DoS 状態が発生させられることがあります。

ソフトウェアの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際には、 http://www.cisco.com/go/psirt/ および本アドバイザリ以降に公開のアドバイザリも参照して、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機器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。情報に不明な点がある場合は、Cisco Technical Assistance Center(TAC)または契約を結んでいるメンテナンス プロバイダーにお問い合せください。

Cisco IOS ソフトウェア テーブル(下記)の各行は Cisco IOS のリリース トレインを示します。あるリリース 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、表の「First Fixed Release」列に示されます (入手可能予想日が示される場合もあります)。「Bundle First Fixed Release」列は、本 Cisco IOS 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全ての脆弱性についての修正を含む最初のリリースを示します。利用可能な最新リリースにアップグレードすることを推奨します。

Major Release

Availability of Repaired Releases

Affected 12.0-Based Releases

First Fixed Release for this Advisory

First Fixed Release for all Advisories in 24 March 2010 Bundle Publication

There are no affected 12.0 based releases

Affected 12.1-Based Releases

First Fixed Release for this Advisory

First Fixed Release for all Advisories in 24 March 2010 Bundle Publication

12.1

Not Vulnerable

Not Vulnerable

12.1AA

Not Vulnerable

Not Vulnerable

12.1AX

Not Vulnerable

Releases up to and including 12.1(11)AX are not vulnerable; first fixed in 12.2SE

12.1AY

Not Vulnerable

Not Vulnerable

12.1AZ

Not Vulnerable

Not Vulnerable

12.1CX

Not Vulnerable

Not Vulnerable

12.1DA

Not Vulnerable

Not Vulnerable

12.1DB

Not Vulnerable

Not Vulnerable

12.1DC

Not Vulnerable

Not Vulnerable

12.1E

Not Vulnerable

Releases up to and including 12.1(7a)E1a are not vulnerable; migrate to any release in 12.2SXF

12.1EA

Not Vulnerable

Releases up to and including 12.1(6)EA2c are not vulnerable.Releases 12.1(8)EA1c and later are not vulnerable.

12.1EB

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.1EC

Not Vulnerable

Releases up to and including 12.1(7)EC are not vulnerable; migrate to 12.2SCB

12.1EO

Not Vulnerable

Releases up to and including 12.1(19)EO6 are not vulnerable.

12.1EU

Not Vulnerable

Not Vulnerable

12.1EV

Not Vulnerable

Not Vulnerable

12.1EW

Not Vulnerable

Not Vulnerable

12.1EX

Not Vulnerable

Vulnerable; migrate to any release in 12.2

12.1EY

Not Vulnerable

Releases up to and including 12.1(7a)EY3 are not vulnerable.

12.1EZ

Not Vulnerable

Not Vulnerable

12.1GA

Not Vulnerable

Not Vulnerable

12.1GB

Not Vulnerable

Not Vulnerable

12.1T

Not Vulnerable

Not Vulnerable

12.1XA

Not Vulnerable

Not Vulnerable

12.1XB

Not Vulnerable

Not Vulnerable

12.1XC

Not Vulnerable

Not Vulnerable

12.1XD

Not Vulnerable

Not Vulnerable

12.1XE

Not Vulnerable

Not Vulnerable

12.1XF

Not Vulnerable

Not Vulnerable

12.1XG

Not Vulnerable

Not Vulnerable

12.1XH

Not Vulnerable

Not Vulnerable

12.1XI

Not Vulnerable

Not Vulnerable

12.1XJ

Not Vulnerable

Not Vulnerable

12.1XL

Not Vulnerable

Not Vulnerable

12.1XM

Not Vulnerable

Not Vulnerable

12.1XP

Not Vulnerable

Not Vulnerable

12.1XQ

Not Vulnerable

Not Vulnerable

12.1XR

Not Vulnerable

Not Vulnerable

12.1XS

Not Vulnerable

Not Vulnerable

12.1XT

Not Vulnerable

Not Vulnerable

12.1XU

Vulnerable; migrate to any release in 12.2

Vulnerable; migrate to any release in 12.2

12.1XV

Not Vulnerable

Releases prior to 12.1(5)XV1 are vulnerable, release 12.1(5)XV1 and later are not vulnerable

12.1XW

Not Vulnerable

Not Vulnerable

12.1XX

Not Vulnerable

Not Vulnerable

12.1XY

Not Vulnerable

Not Vulnerable

12.1XZ

Not Vulnerable

Not Vulnerable

12.1YA

Not Vulnerable

Not Vulnerable

12.1YB

Not Vulnerable

Vulnerable; migrate to any release in 12.2

12.1YC

Not Vulnerable

Not Vulnerable

12.1YD

Vulnerable; migrate to any release in 12.2

Vulnerable; migrate to any release in 12.2

12.1YE

Not Vulnerable

Releases prior to 12.1(5)YE6 are vulnerable, release 12.1(5)YE6 and later are not vulnerable.

12.1YF

Not Vulnerable

Not Vulnerable

12.1YH

Not Vulnerable

Not Vulnerable

12.1YI

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.1YJ

Not Vulnerable

Not Vulnerable

Affected 12.2-Based Releases

First Fixed Release for this Advisory

First Fixed Release for all Advisories in 24 March 2010 Bundle Publication

12.2

Not Vulnerable

Not Vulnerable

12.2B

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2BC

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2BW

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2BX

Vulnerable; migrate to any release in 12.2SB

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2BY

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2BZ

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2CX

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2CY

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2CZ

Vulnerable; migrate to any release in 12.2S

Vulnerable; migrate to any release in 12.2SRE

12.2DA

Not Vulnerable

Not Vulnerable

12.2DD

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2DX

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2EW

Not Vulnerable

Not Vulnerable

12.2EWA

Not Vulnerable

Not Vulnerable

12.2EX

Not Vulnerable

Releases up to and including 12.2(37)EX are not vulnerable.

Releases 12.2(44)EX and later are not vulnerable; first fixed in 12.2SE

12.2EY

Not Vulnerable

Releases prior to 12.2(37)EY are vulnerable, release 12.2(37)EY and later are not vulnerable

12.2EZ

Not Vulnerable

Not Vulnerable

12.2FX

Not Vulnerable

Not Vulnerable

12.2FY

Not Vulnerable

Not Vulnerable

12.2FZ

Not Vulnerable

Not Vulnerable

12.2IRA

Not Vulnerable

Vulnerable; first fixed in 12.2SRC

12.2IRB

Not Vulnerable

Vulnerable; first fixed in 12.2SRC

12.2IRC

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2IRD

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2IXA

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2IXB

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2IXC

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2IXD

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2IXE

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2IXF

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2IXG

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2IXH

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2JA

Not Vulnerable

Releases up to and including 12.2(4)JA1 are not vulnerable.

12.2JK

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2MB

Not Vulnerable

Not Vulnerable

12.2MC

Releases up to and including 12.2(15)MC1 are not vulnerable.

Releases 12.2(15)MC2b and later are not vulnerable; first fixed in 15.0M

Vulnerable; first fixed in 12.4

12.2MRA

Not Vulnerable

Not Vulnerable

12.2S

Not Vulnerable

Releases prior to 12.2(30)S are vulnerable, release 12.2(30)S and later are not vulnerable;

12.2SB

Not Vulnerable

12.2(33)SB8

12.2(31)SB18; Available on 24-MAR-10

12.2SBC

Not Vulnerable

Vulnerable; migrate to any release in 12.2SRE

12.2SCA

Not Vulnerable

Vulnerable; first fixed in 12.2SCB

12.2SCB

Not Vulnerable

12.2(33)SCB6

12.2SCC

Not Vulnerable

12.2(33)SCC1

12.2SCD

Not Vulnerable

Not Vulnerable

12.2SE

Not Vulnerable

12.2(50)SE4; Available on 25-MAR-10

12.2SEA

Not Vulnerable

Not Vulnerable

12.2SEB

Not Vulnerable

Not Vulnerable

12.2SEC

Not Vulnerable

Not Vulnerable

12.2SED

Not Vulnerable

Vulnerable; first fixed in 12.2SE

12.2SEE

Not Vulnerable

Vulnerable; first fixed in 12.2SE

12.2SEF

Not Vulnerable

Not Vulnerable

12.2SEG

Not Vulnerable

Releases prior to 12.2(25)SEG4 are vulnerable, release 12.2(25)SEG4 and later are not vulnerable; first fixed in 12.2SE

12.2SG

Not Vulnerable

Releases up to 12.2(31)SG1 are not vulnerable; releases 12.2(40)SG and later are not vulnerable.

12.2SGA

Not Vulnerable

Not Vulnerable

12.2SL

Not Vulnerable

Not Vulnerable

12.2SM

Not Vulnerable

Not Vulnerable

12.2SO

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2SQ

Not Vulnerable

Not Vulnerable

12.2SRA

Not Vulnerable

Vulnerable; first fixed in 12.2SRD

12.2SRB

Not Vulnerable

Vulnerable; first fixed in 12.2SRD

12.2SRC

Not Vulnerable

12.2(33)SRC5

12.2SRD

Not Vulnerable

12.2(33)SRD3

12.2SRE

Not Vulnerable

Not Vulnerable

12.2STE

Not Vulnerable

Not Vulnerable

12.2SU

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2SV

Not Vulnerable

Releases up to and including 12.2(18)SV2 are not vulnerable.

12.2SVA

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2SVC

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2SVD

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2SVE

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2SW

Not Vulnerable

Releases up to and including 12.2(25)SW3 are not vulnerable.

Releases 12.2(25)SW12 and later are not vulnerable; first fixed in 15.0M

12.2SX

Not Vulnerable

Vulnerable; first fixed in 12.2SXF

12.2SXA

Not Vulnerable

Vulnerable; first fixed in 12.2SXF

12.2SXB

Not Vulnerable

Vulnerable; first fixed in 12.2SXF

12.2SXD

Not Vulnerable

Vulnerable; first fixed in 12.2SXF

12.2SXE

Not Vulnerable

Vulnerable; first fixed in 12.2SXF

12.2SXF

Not Vulnerable

12.2(18)SXF17a

12.2SXH

Not Vulnerable

12.2(33)SXH6

12.2SXI

Not Vulnerable

12.2(33)SXI2a

12.2(33)SXI3

12.2SY

Not Vulnerable

Vulnerable; migrate to any release in 12.2SRE

12.2SZ

Not Vulnerable

Vulnerable; migrate to any release in 12.2SRE

12.2T

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

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; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XB

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XC

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XD

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XE

Not Vulnerable

Not Vulnerable

12.2XF

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XG

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XH

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XI

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XJ

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XK

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XL

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XM

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XN

Not Vulnerable

Releases prior to 12.2(33)XN1 are vulnerable, release 12.2(33)XN1 and later are not vulnerable; first fixed in 12.2SRC

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

12.2(33)XNE1; 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

Not Vulnerable

Not Vulnerable

12.2XQ

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XR

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XS

Not Vulnerable

Not Vulnerable

12.2XT

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XU

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XV

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2XW

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2YA

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2YB

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

12.2YC

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

Not Vulnerable

Not Vulnerable

12.2YF

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

12.2YG

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2YH

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

12.2YJ

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

Not Vulnerable

Not Vulnerable

12.2YL

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

12.2YM

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2YN

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

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2YP

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2YQ

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2YR

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2YS

Not Vulnerable

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

12.2YU

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

12.2YV

Releases prior to 12.2(11)YV1 are vulnerable, release 12.2(11)YV1 and later are not vulnerable

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

Not Vulnerable

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

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2ZA

Not Vulnerable

Vulnerable; first fixed in 12.2SXF

12.2ZB

Releases up to and including 12.2(8)ZB are not vulnerable.

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; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2ZF

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2ZG

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.2ZH

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

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

12.2ZL

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

Not Vulnerable

Vulnerable; first fixed in 12.2SXH

12.2ZX

Not Vulnerable

Vulnerable; migrate to any release in 12.2SRE

12.2ZY

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.2ZYA

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

Affected 12.3-Based Releases

First Fixed Release for this Advisory

First Fixed Release for all Advisories in 24 March 2010 Bundle Publication

12.3

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3B

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3BC

Not Vulnerable

Vulnerable; first fixed in 12.2SCB

12.3BW

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3EU

Not Vulnerable

Not Vulnerable

12.3JA

Not Vulnerable

Releases prior to 12.3(11)JA5 are vulnerable, release 12.3(11)JA5 and later are not vulnerable

12.3JEA

Not Vulnerable

Releases prior to 12.3(8)JEA4 are vulnerable, release 12.3(8)JEA4 and later are not vulnerable

12.3JEB

Not Vulnerable

Releases prior to 12.3(8)JEB2 are vulnerable, release 12.3(8)JEB2 and later are not vulnerable

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 15.0M

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3JL

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.3JX

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.3T

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3TPC

Releases up to and including 12.3(4)TPC11a are not vulnerable.

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.3VA

Not Vulnerable

Not Vulnerable

12.3XA

Releases prior to 12.3(2)XA7 are vulnerable, release 12.3(2)XA7 and later are not vulnerable; first fixed in 15.0M

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

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; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3XD

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3XE

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; first fixed in 12.4

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

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; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3XI

Note: Releases prior to 12.3(7)XI11 are vulnerable, release 12.3(7)XI11 and later are not vulnerable;

Releases prior to 12.3(7)XI11 are vulnerable, release 12.3(7)XI11 and later are not vulnerable

12.3XJ

Vulnerable; migrate to any release in 12.4XN

Vulnerable; first fixed in 12.4XR

12.3XK

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3XL

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3XQ

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3XR

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3XS

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3XU

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3XW

Vulnerable; migrate to any release in 12.4XN

Vulnerable; first fixed in 12.4XR

12.3XX

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3XY

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3XZ

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3YA

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3YD

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3YF

Vulnerable; migrate to any release in 12.4XN

Vulnerable; first fixed in 12.4XR

12.3YG

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3YH

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3YI

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3YJ

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3YK

Releases prior to 12.3(11)YK3 are vulnerable, release 12.3(11)YK3 and later are not vulnerable; first fixed in 12.4T

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3YM

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3YQ

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3YS

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3YT

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3YU

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.3YX

Vulnerable; migrate to any release in 12.4XN

Vulnerable; first fixed in 12.4XR

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; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Affected 12.4-Based Releases

First Fixed Release for this Advisory

First Fixed Release for all Advisories in 24 March 2010 Bundle Publication

12.4

12.4(25c)

15.0(1)M1

12.4(25c)

15.0(1)M1

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

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

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

12.4(10b)JDD1

12.4JHA

Not Vulnerable

Not Vulnerable

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

12.4JMA

Not Vulnerable

Releases prior to 12.4(3g)JMA2 are vulnerable, release 12.4(3g)JMA2 and later are not vulnerable

12.4JMB

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 12.4JA

12.4MD

Not Vulnerable

12.4(24)MD

12.4MDA

Not Vulnerable

12.4(22)MDA2

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

12.4SW

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.4T

12.4(15)T12

12.4(24)T3; Available on 26-MAR-10

12.4(22)T4

12.4(15)T12

12.4(20)T5

12.4(24)T3; Available on 26-MAR-10

12.4(22)T4

12.4XA

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.4XB

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.4XC

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.4XD

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.4XE

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.4XF

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.4XG

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.4XJ

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.4XK

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

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

Releases up to and including 12.4(15)XM are not vulnerable.

Releases 12.4(15)XM3 and later are not vulnerable; first fixed in 12.4T

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.4XN

Not Vulnerable

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

Not Vulnerable

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.4XR

Not Vulnerable

12.4(22)XR3

12.4XT

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

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; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.4XY

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.4XZ

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.4YA

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.

12.4YB

12.4(22)YB5

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.4YD

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

12.4YE

Not Vulnerable

12.4(22)YE2

12.4(24)YE

12.4YG

Not Vulnerable

Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

Affected 15.0-Based Releases

First Fixed Release for this Advisory

First Fixed Release for all Advisories in 24 March 2010 Bundle Publication

15.0M

15.0(1)M1

15.0(1)M1

Affected 15.1-Based Releases

First Fixed Release for this Advisory

First Fixed Release for all Advisories in 24 March 2010 Bundle Publication

There are no affected 15.1 based releases

Cisco IOS-XE Software

IOS-XE Release

First Fixed Release

2.1.x

Not Vulnerable

2.2.x

Not Vulnerable

2.3.x

Not Vulnerable

2.4.x

Not Vulnerable

2.5.x

2.5.1

2.6.x

Not Vulnerable

回避策

Cisco IOS デバイスが H.323 を実行しなくてもよい場合、H.323 を無効にする以外にこの脆弱性には緩和策はありません。H.323 トラフィックを承認すべきではないインターフェイスでアクセス リストを適用し、戦略的にファイアウォールを設置することで、アップグレードが実行可能になるまで影響を大幅に削減できる可能性があります。

シスコでは、ネットワーク ソリューションの設計および導入を支援するための Solution Reference Network Design(SRND; ソリューション リファレンス ネットワーク デザイン)ガイド (http://www.cisco.com/en/US/netsol/ns742/networking_solutions_program_category_home.html)を提供しています。 音声セキュリティのベスト プラクティスは、次のリンクにある「Cisco Unified Communications SRND Based on Cisco Unified Communications Manager 6.x」で説明します。 http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/6x/security.html

次の例のように voice service voip モードで call service stop forced コマンドを使用できます。

voice service voip
 h323
  call service stop forced

注:call service stop forced コマンドは、全ての H.323 コール処理をディセーブルにします。

ネットワーク内のシスコ デバイスに適用可能なその他の緩和策については、このアドバイザリの付属ドキュメント『Cisco Applied Mitigation Bulletin: Identifying and Mitigating Exploitation of the Denial of Service Vulnerabilities in Cisco Unified Communications Manager and Cisco IOS Software』にて参照できます。このドキュメントは、/en/US/products/products_applied_mitigation_bulletin09186a0080b20ee9.html から入手できます。

修正済みソフトウェアの取得

シスコはこれらの脆弱性に対応するための無償ソフトウェア 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。そのようなソフトウェア 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 Cisco.com ダウンロード サイト http://www.cisco.com/public/sw-center/sw-usingswc.shtml に説明のあるその他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、シスコのワールドワイド Web サイト上のソフトウェア センター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、本脆弱性に関する適切な処置について指示と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。TAC の連絡先は次のとおりです。

  • +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、このお知らせの 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に対する無償アップグレードは、TAC 経由でご要求いただく必要があります。

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、 http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html を参照してください。

不正利用事例と公式発表

Cisco 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。

この脆弱性はシスコ内部でのテストによって発見されました。

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アドバイザリ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。

情報の配信

本アドバイザリは、次のシスコのワールドワイド Web サイト上に掲載されます。

http://www.cisco.com/JP/support/public/ht/security/107/1076226/cisco-sa-20100324-h323-j.shtml

ワールドワイド Web 以外にも、次の電子メールおよび Usenet ニュースの受信者向けに、この通知のテキスト版が Cisco PSIRT PGP キーによるクリア署名つきで投稿されています。

  • 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
  • comp.dcom.sys.cisco@newsgate.cisco.com

このアドバイザリに関する今後の更新は、いかなるものもシスコのワールドワイド Web サイトに掲載される予定です。 しかしながら、前述のメーリングリストもしくは ニュースグループに対し 積極的に配信されるとは限りません。この問題に関心があるお客様は上記 URL にて最新情報を ご確認いただくことをお勧めいたします。

更新履歴

Revision 1.1

2010-March-26

Added caution about debug commands.

Revision 1.0

2010-March-24

Initial public release.

シスコのセキュリティ手順

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、シスコ ワールドワイド Web サイトの http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html にアクセスしてください。このページには、シスコのセキュリティ通知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。