Cisco Security Advisory: Cisco IOS Software Data-Link Switching Vulnerability

2011 年 9 月 29 日 - ライター翻訳版
その他のバージョン: PDFpdf | 英語版 (2011 年 9 月 28 日) | フィードバック


Advisory ID: cisco-sa-20110928-dlsw

http://www.cisco.com/warp/public/707/cisco-sa-20110928-dlsw.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 2011 September 30 2300 UTC (GMT)

For Public Release 2011 September 28 1600 UTC (GMT)


要約

Cisco IOS ソフトウェアに、Data-Link Switching(DLSw)機能のメモリ リークを引き起こす脆弱性が含まれます。これが原因で、巧妙に細工された IP プロトコル 91 のパケットを処理するとき、デバイスが再起動す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。

このアドバイザリは次のリンクに掲載されます。 http://www.cisco.com/warp/public/707/cisco-sa-20110928-dlsw.shtml

注:2011 年 9 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 10 件の Cisco Security Advisory が含まれています。9 件のアドバイザリは Cisco IOS ソフトウェアの脆弱性に対処するもので、1 件は Cisco Unified Communications Manager 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 Cisco IOS ソフトウェア リリース、および 2011 年 9 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: 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_sep11.html

該当製品

脆弱性が存在する製品

DLSw の promiscuous 機能が有効の Cisco IOS デバイスは、このアドバイザリに記載されている脆弱性の影響を受けます。DLSw の promiscuous 機能が有効のデバイスには、ローカルの DLSw ピアを定義する設定に「promiscuous」というキーワードを含む行が含まれています。この設定は、show running-config コマンドを実行することで確認できます。DLSw の promiscuous 機能が有効に設定されたシステムには、次のような行が含まれています。

dlsw local-peer promiscuous

または

dlsw local-peer peer-id <IP address> promiscuous

Cisco IOS デバイスで実行されているソフトウェアを確認するには、デバイスにログインし、show version コマンドを発行してシステム バナーを表示します。Cisco IOS ソフトウェアは、「Cisco Internetwork Operating System Software」または「Cisco IOS Software」と表示されます。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、IOS バージョン 15.0(1)M1 を実行しているデバイスからの出力例です。

Router> show version
Cisco IOS Software, C3900 Software (C3900-UNIVERSALK9-M), Version 15.0(1)M1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Wed 02-Dec-09 17:17 by prod_rel_team

Cisco IOS ソフトウェアのリリース命名規則の追加情報は、以下のリンクの「Cisco IOS and NX-OS Software 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

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

DLSw は、IP ネットワーク上で IBM のシステム ネットワーク アーキテクチャ(SNA)とネットワーク BIOS(NetBIOS)のトラフィックを転送する技術です。シスコで実装している DLSw over Fast Sequence Transport(FST)では、IP プロトコル 91 を使用します。DLSw の promiscuous 機能は、ローカル ピアがスタティックに設定されていないリモート ピアとの接続の確立を許可します。

DLSw が設定された Cisco IOS デバイスは、IP プロトコル 91 のパケットをリスニングします。DLSw の設定によっては、UDP ポート 2067 と複数の TCP ポートが開いている可能性もあります。このドキュメントに記載されている脆弱性は、IP プロトコル 91 を使用した場合にのみ不正利用されます。UDP または TCP では不正利用されません。

スタティックでのみ DLSw が設定されたピアは、この脆弱性の影響を受けません。

この脆弱性は Cisco Bug ID CSCth69364 登録ユーザのみ)に文書化されており、Common Vulnerabilities and Exposures(CVE)ID として CVE-2011-0945 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 計算ツールを以下の URL にて提供しています。

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

CSCth69364 DLSw FST Memory Leak

Calculate the environmental score of CSCth69364

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

この脆弱性の不正利用に成功した場合、サービス拒否(DoS)状態につながるメモリ リークを引き起こす可能性があります。メモリが使い果たされると、Cisco IOS デバイスは再起動するか応答不能になります。この状態から回復するには、電源をオフ/オンする必要があります。

この脆弱性によって引き起こされたメモリ リークを確認するには、 show dlsw peers | include FST.*DISCONN コマンドを実行します。次に示すように、FST ピアのリストが単調に増えていくリストにおいて、DISCONN 状態が一定であれば、メモリが確保されているということです。

Router> show dlsw peers | include FST.*DISCONN
FST 176.74.146.194  DISCONN          1         0  prom      0    -   -        -
FST 9.180.128.186   DISCONN          1         0  prom      0    -   -        -
FST 139.71.105.39   DISCONN          1         0  prom      0    -   -        -
FST 138.150.39.18   DISCONN          1         0  prom      0    -   -        -
FST 253.240.220.167 DISCONN          1         0  prom      0    -   -        -
FST 252.186.119.224 DISCONN          1         0  prom      0    -   -        -
FST 41.255.172.252  DISCONN          1         0  prom      0    -   -        -

! --- Output truncated

Router> 

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。

また、次のリンク先にある Cisco Security Intelligence Operations(SIO)ポータルで、Cisco IOS ソフトウェア チェッカーを入手できます。 http://tools.cisco.com/security/center/selectIOSVersion.x このツールでは、特定の Cisco IOS ソフトウェア バージョンに影響のあるセキュリティ アドバイザリを調べるための機能をいくつか提供しています。

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 For This Advisory」列に示されます。「First Fixed Release for All Advisories in the September 2011 Bundle 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。

Major Release

Availability of Repaired Releases

Affected 12.0-Based Releases

First Fixed Release

First Fixed Release for All Advisories in the September 2011 Bundled Publication

There are no affected 12.0-based releases

Affected 12.1-Based Releases

First Fixed Release

First Fixed Release for All Advisories in the September 2011 Bundled Publication

12.1E

Vulnerable; first fixed in Release 12.2SXF

Vulnerable; first fixed in Release 12.2SXF

Affected 12.2-Based Releases

First Fixed Release

First Fixed Release for All Advisories in the September 2011 Bundled Publication

12.2

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.2B

Vulnerable; first fixed in Release 12.4

Releases up to and including 12.2(2)B7 are not vulnerable.

Vulnerable; first fixed in Release 12.4

12.2BC

Not vulnerable

Vulnerable; first fixed in Release 12.4

12.2BW

Not vulnerable

Not vulnerable

12.2BX

Vulnerable; first fixed in Release 12.2SB

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

Vulnerable; first fixed in Release 12.2SB

12.2BY

Not vulnerable

Not vulnerable

12.2BZ

Not vulnerable

Not vulnerable

12.2CX

Not vulnerable

Vulnerable; first fixed in Release 12.4

12.2CY

Not vulnerable

Not vulnerable

12.2CZ

Not vulnerable

Vulnerable; first fixed in Release 12.2SB

12.2DA

Not vulnerable

Not vulnerable

12.2DD

Not vulnerable

Not vulnerable

12.2DX

Not vulnerable

Not vulnerable

12.2EU

Not vulnerable

Not vulnerable

12.2EW

Not vulnerable

Releases up to and including 12.2(20)EW4 are not vulnerable.

12.2EWA

Not vulnerable

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

12.2EX

Not vulnerable

12.2(55)EX3

12.2EY

Not vulnerable

12.2(58)EY

12.2EZ

Not vulnerable

Vulnerable; migrate to any release in 15.0SE

12.2FX

Not vulnerable

Vulnerable; first fixed in Release 12.2SE

12.2FY

Not vulnerable

Vulnerable; first fixed in Release 12.2EX

12.2FZ

Not vulnerable

Vulnerable; first fixed in Release 12.2SE

12.2IRA

Vulnerable; migrate to any release in 12.2IRG

Vulnerable; migrate to any release in 12.2IRG

12.2IRB

Vulnerable; migrate to any release in 12.2IRG

Vulnerable; migrate to any release in 12.2IRG

12.2IRC

Vulnerable; migrate to any release in 12.2IRG

Vulnerable; migrate to any release in 12.2IRG

12.2IRD

12.2(33)IRD1

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

12.2IRE

12.2(33)IRE3

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

12.2IRF

Vulnerable; migrate to any release in 12.2IRG

Vulnerable; migrate to any release in 12.2IRG

12.2IRG

Not vulnerable

Not vulnerable

12.2IXA

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

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

12.2IXB

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

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

12.2IXC

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

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

12.2IXD

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

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

12.2IXE

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

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

12.2IXF

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

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

12.2IXG

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

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

12.2IXH

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

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

12.2JA

Not vulnerable

Not vulnerable

12.2JK

Not vulnerable

Not vulnerable

12.2MB

Not vulnerable

Not vulnerable

12.2MC

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.2MRA

Not vulnerable

Vulnerable; first fixed in Release 12.2SRD

12.2MRB

Not vulnerable

Vulnerable; contact your support organization per the instructions in the 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 12.2SB

Releases prior to 12.2(30)S are vulnerable; Releases 12.2(30)S and later are not vulnerable. First fixed in Release 12.2SB

12.2SB

12.2(31)SB20

12.2(33)SB10

12.2(31)SB20

12.2(33)SB10

12.2SBC

Vulnerable; first fixed in Release 12.2SB

Vulnerable; first fixed in Release 12.2SB

12.2SCA

Vulnerable; first fixed in Release 12.2SCC

Vulnerable; first fixed in Release 12.2SCC

12.2SCB

Vulnerable; first fixed in Release 12.2SCC

Vulnerable; first fixed in Release 12.2SCC

12.2SCC

12.2(33)SCC7

12.2(33)SCC7

12.2SCD

12.2(33)SCD6

12.2(33)SCD7

12.2(33)SCD6

12.2SCE

12.2(33)SCE1

12.2(33)SCE2

12.2(33)SCE112.2(33)SCE2

12.2SCF

Not vulnerable

Not vulnerable

12.2SE

Not vulnerable

12.2(55)SE312.2(58)SE

12.2SEA

Not vulnerable

Vulnerable; first fixed in Release 12.2SE

12.2SEB

Not vulnerable

Vulnerable; first fixed in Release 12.2SE

12.2SEC

Not vulnerable

Vulnerable; first fixed in Release 12.2SE

12.2SED

Not vulnerable

Vulnerable; first fixed in Release 12.2SE

12.2SEE

Not vulnerable

Vulnerable; first fixed in Release 12.2SE

12.2SEF

Not vulnerable

Vulnerable; first fixed in Release 12.2SE

12.2SEG

Not vulnerable

Releases prior to 12.2(25)SEG4 are vulnerable; Releases 12.2(25)SEG4 and later are not vulnerable. First fixed in Release 12.2EX

12.2SG

Releases prior to 12.2(40)SG are vulnerable; Releases 12.2(40)SG and later are not vulnerable.

Releases prior to 12.2(53)SG4 are vulnerable; Releases 12.2(53)SG4 and later are not vulnerable.

12.2SGA

Not vulnerable

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

12.2SL

Not vulnerable

Not vulnerable

12.2SM

Not vulnerable

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

12.2SO

Not vulnerable

Not vulnerable

12.2SQ

Not vulnerable

12.2(50)SQ3

12.2SRA

Vulnerable; first fixed in Release 12.2SRD

Vulnerable; first fixed in Release 12.2SRD

12.2SRB

Vulnerable; first fixed in Release 12.2SRD

Vulnerable; first fixed in Release 12.2SRD

12.2SRC

Vulnerable; first fixed in Release 12.2SRD

Vulnerable; first fixed in Release 12.2SRD

12.2SRD

12.2(33)SRD6

12.2(33)SRD6

12.2SRE

12.2(33)SRE3

12.2(33)SRE4

12.2STE

Not vulnerable

Not vulnerable

12.2SU

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.2SV

Releases prior to 12.2(29a)SV are vulnerable; Releases 12.2(29a)SV and later are not vulnerable. Migrate to any release in 12.2SVD

Releases prior to 12.2(29a)SV are vulnerable; Releases 12.2(29a)SV and later are not vulnerable. Migrate to any release in 12.2SVD

12.2SVA

Not vulnerable

Not vulnerable

12.2SVC

Not vulnerable

Not vulnerable

12.2SVD

Not vulnerable

Not vulnerable

12.2SVE

Not vulnerable

Not vulnerable

12.2SW

Releases prior to 12.2(25)SW12 are vulnerable; Releases 12.2(25)SW12 and later are not vulnerable.

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

12.2SX

Vulnerable; first fixed in Release 12.2SXF

Vulnerable; first fixed in Release 12.2SXF

12.2SXA

Vulnerable; first fixed in Release 12.2SXF

Vulnerable; first fixed in Release 12.2SXF

12.2SXB

Vulnerable; first fixed in Release 12.2SXF

Vulnerable; first fixed in Release 12.2SXF

12.2SXD

Vulnerable; first fixed in Release 12.2SXF

Vulnerable; first fixed in Release 12.2SXF

12.2SXE

Vulnerable; first fixed in Release 12.2SXF

Vulnerable; first fixed in Release 12.2SXF

12.2SXF

12.2(18)SXF17b

12.2(18)SXF17b

12.2SXH

12.2(33)SXH8a

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

12.2SXI

12.2(33)SXI6

12.2(33)SXI6

12.2SXJ

Not vulnerable

12.2(33)SXJ1

12.2SY

12.2(50)SY

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

12.2SZ

Vulnerable; first fixed in Release 12.2SB

Vulnerable; first fixed in Release 12.2SB

12.2T

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.2TPC

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

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

12.2XA

Not vulnerable

Not vulnerable

12.2XB

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.2XC

Not vulnerable

Not vulnerable

12.2XD

Not vulnerable

Not vulnerable

12.2XE

Not vulnerable

Not vulnerable

12.2XF

Not vulnerable

Not vulnerable

12.2XG

Not vulnerable

Not vulnerable

12.2XH

Not vulnerable

Not vulnerable

12.2XI

Not vulnerable

Not vulnerable

12.2XJ

Not vulnerable

Not vulnerable

12.2XK

Not vulnerable

Not vulnerable

12.2XL

Not vulnerable

Not vulnerable

12.2XM

Not vulnerable

Not vulnerable

12.2XN

Not vulnerable

Not vulnerable

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

Not vulnerable

Releases prior to 12.2(54)XO are vulnerable; Releases 12.2(54)XO and later are not vulnerable.

12.2XQ

Not vulnerable

Not vulnerable

12.2XR

Not vulnerable

Not vulnerable

12.2XS

Not vulnerable

Not vulnerable

12.2XT

Not vulnerable

Not vulnerable

12.2XU

Not vulnerable

Not vulnerable

12.2XV

Not vulnerable

Not vulnerable

12.2XW

Not vulnerable

Not vulnerable

12.2YA

Releases prior to 12.2(4)YA8 are vulnerable; Releases 12.2(4)YA8 and later are not vulnerable. First fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.2YB

Not vulnerable

Not vulnerable

12.2YC

Not vulnerable

Not vulnerable

12.2YD

Not vulnerable

Not vulnerable

12.2YE

Not vulnerable

Not vulnerable

12.2YF

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

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

12.2YG

Not vulnerable

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

12.2YH

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

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

12.2YJ

Releases prior to 12.2(8)YJ1 are vulnerable; Releases 12.2(8)YJ1 and later are not vulnerable.

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

12.2YK

Not vulnerable

Not vulnerable

12.2YL

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

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

12.2YM

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.2YN

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

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

12.2YO

Not vulnerable

Not vulnerable

12.2YP

Not vulnerable

Not vulnerable

12.2YQ

Not vulnerable

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

12.2YR

Not vulnerable

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

12.2YS

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

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

12.2YT

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

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

12.2YU

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

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

12.2YV

Releases prior to 12.2(11)YV1 are vulnerable; Releases 12.2(11)YV1 and later are not vulnerable.

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

12.2YW

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

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

12.2YX

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

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

12.2YY

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

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

12.2YZ

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

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

12.2ZA

Vulnerable; first fixed in Release 12.2SXF

Vulnerable; first fixed in Release 12.2SXF

12.2ZB

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

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

12.2ZC

Not vulnerable

Not vulnerable

12.2ZD

Not vulnerable

Not vulnerable

12.2ZE

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.2ZF

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.2ZG

Not vulnerable

Not vulnerable

12.2ZH

Releases prior to 12.2(13)ZH6 are vulnerable; Releases 12.2(13)ZH6 and later are not vulnerable. First fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.2ZJ

Not vulnerable

Not vulnerable

12.2ZL

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

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

12.2ZP

Not vulnerable

Not vulnerable

12.2ZU

Vulnerable; first fixed in Release 12.2SXH

Vulnerable; first fixed in Release 12.2SXH

12.2ZX

Not vulnerable

Not vulnerable

12.2ZY

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

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

12.2ZYA

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

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

Affected 12.3-Based Releases

First Fixed Release

First Fixed Release for All Advisories in the September 2011 Bundled Publication

12.3

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.3B

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.3BC

Not vulnerable

Vulnerable; first fixed in Release 12.2SCC

12.3BW

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.3JA

Not vulnerable

Not vulnerable

12.3JEA

Not vulnerable

Not vulnerable

12.3JEB

Not vulnerable

Not vulnerable

12.3JEC

Not vulnerable

Not vulnerable

12.3JED

Not vulnerable

Not vulnerable

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

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

12.3JL

Not vulnerable

Not vulnerable

12.3JX

Not vulnerable

Not vulnerable

12.3T

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.3TPC

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

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

12.3VA

Not vulnerable

Not vulnerable

12.3XA

Releases prior to 12.3(2)XA7 are vulnerable; Releases 12.3(2)XA7 and later are not vulnerable. First fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.3XB

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

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

12.3XC

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.3XD

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.3XE

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.3XF

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

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

12.3XG

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.3XI

Vulnerable; first fixed in Release 12.2SB

Vulnerable; first fixed in Release 12.2SB

12.3XJ

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

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

12.3XK

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.3XL

Vulnerable; first fixed in Release 12.4T

Vulnerable; first fixed in Release 12.4T

12.3XQ

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.3XR

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.3XS

Not vulnerable

Vulnerable; first fixed in Release 12.4

12.3XU

Vulnerable; first fixed in Release 12.4T

Vulnerable; first fixed in Release 12.4T

12.3XW

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

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

12.3XX

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.3XY

Not vulnerable

Not vulnerable

12.3XZ

Vulnerable; first fixed in Release 12.4

Vulnerable; first fixed in Release 12.4

12.3YA

Not vulnerable

Vulnerable; first fixed in Release 12.4

12.3YD

Not vulnerable

Not vulnerable

12.3YF

Not vulnerable

Not vulnerable

12.3YG

Not vulnerable

Not vulnerable

12.3YH

Not vulnerable

Not vulnerable

12.3YI

Not vulnerable

Not vulnerable

12.3YJ

Vulnerable; first fixed in Release 12.4T

Vulnerable; first fixed in Release 12.4T

12.3YK

Not vulnerable

Not vulnerable

12.3YM

Not vulnerable

Not vulnerable

12.3YQ

Vulnerable; first fixed in Release 12.4T

Vulnerable; first fixed in Release 12.4T

12.3YS

Vulnerable; first fixed in Release 12.4T

Releases up to and including 12.3(11)YS1 are not vulnerable.

Vulnerable; first fixed in Release 12.4T

12.3YT

Vulnerable; first fixed in Release 12.4T

Vulnerable; first fixed in Release 12.4T

12.3YU

Vulnerable; first fixed in Release 12.4XB

Vulnerable; first fixed in Release 12.4XB

12.3YX

Vulnerable; migrate to any release in 12.4XR

Vulnerable; first fixed in Release 12.4T

12.3YZ

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

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

12.3ZA

Vulnerable; first fixed in Release 12.4T

Vulnerable; first fixed in Release 12.4T

Affected 12.4-Based Releases

First Fixed Release

First Fixed Release for All Advisories in the September 2011 Bundled Publication

12.4

12.4(25e)

12.4(25f)

12.4GC

12.4(24)GC4

12.4(24)GC4

12.4JA

Not vulnerable

Not vulnerable

12.4JAX

Not vulnerable

Not vulnerable

12.4JDA

Not vulnerable

Not vulnerable

12.4JDC

Not vulnerable

Not vulnerable

12.4JHA

Not vulnerable

Not vulnerable

12.4JHB

Not vulnerable

Not vulnerable

12.4JHC

Not vulnerable

Not vulnerable

12.4JK

Not vulnerable

Not vulnerable

12.4JL

Not vulnerable

Not vulnerable

12.4JMA

Not vulnerable

Not vulnerable

12.4JMB

Not vulnerable

Not vulnerable

12.4JX

Not vulnerable

Vulnerable; migrate to any release in 12.4JA

Releases up to and including 12.4(21a)JX are not vulnerable.

12.4JY

Not vulnerable

Not vulnerable

12.4MD

Not vulnerable

12.4(24)MD6 on 28-Oct-2011

12.4MDA

Not vulnerable

12.4(24)MDA7

12.4MDB

Not vulnerable

12.4(24)MDB3

12.4MR

Not vulnerable

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

12.4MRA

Not vulnerable

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

12.4MRB

Not vulnerable

Vulnerable; first fixed in Release 12.4T

12.4SW

Not vulnerable

Not vulnerable

12.4T

12.4(15)T15

12.4(24)T5

12.4(15)T16

12.4(24)T6

12.4XA

Vulnerable; first fixed in Release 12.4T

Vulnerable; first fixed in Release 12.4T

12.4XB

12.4(2)XB12

12.4(2)XB12

12.4XC

Not vulnerable

Not vulnerable

12.4XD

Vulnerable; first fixed in Release 12.4T

Vulnerable; first fixed in Release 12.4T

12.4XE

Not vulnerable

Not vulnerable

12.4XF

Not vulnerable

Vulnerable; first fixed in Release 12.4T

12.4XG

Vulnerable; first fixed in Release 12.4T

Vulnerable; first fixed in Release 12.4T

12.4XJ

Not vulnerable

Not vulnerable

12.4XK

Not vulnerable

Not vulnerable

12.4XL

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

Vulnerable; contact your support organization per the instructions in the 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 Release 12.4T

Vulnerable; first fixed in Release 12.4T

12.4XN

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

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

12.4XP

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

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

12.4XQ

Not vulnerable

Vulnerable; first fixed in Release 12.4T

12.4XR

Not vulnerable

Vulnerable; first fixed in Release 12.4T

12.4XT

Vulnerable; first fixed in Release 12.4T

Vulnerable; first fixed in Release 12.4T

12.4XV

Not vulnerable

Not vulnerable

12.4XW

Vulnerable; first fixed in Release 12.4T

Vulnerable; first fixed in Release 12.4T

12.4XY

Vulnerable; first fixed in Release 12.4T

Vulnerable; first fixed in Release 12.4T

12.4XZ

Vulnerable; first fixed in Release 12.4T

Vulnerable; first fixed in Release 12.4T

12.4YA

Vulnerable; first fixed in Release 12.4T

Vulnerable; first fixed in Release 12.4T

12.4YB

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

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

12.4YD

Not vulnerable

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

12.4YE

Not vulnerable

Vulnerable; fixed in 12.4(22)YE6 on 30-Sept-2011; 12.4(24)YE7 available on 17-Oct-2011

12.4YG

Not vulnerable

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

Affected 15.0-Based Releases

First Fixed Release

First Fixed Release for All Advisories in the September 2011 Bundled Publication

15.0M

15.0(1)M4

15.0(1)M5a

15.0(1)M7

15.0MR

Not vulnerable

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

15.0MRA

Not vulnerable

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

15.0S

15.0(1)S3a

15.0(1)S4

Cisco IOS XE devices: Please see Cisco IOS-XE Software Availability

15.0(1)S4

Cisco IOS XE devices: Please see Cisco IOS-XE Software Availability

15.0SA

Not vulnerable

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

15.0SE

Not vulnerable

Not vulnerable

15.0SG

Cisco IOS XE devices: Please see Cisco IOS-XE Software Availability

Cisco IOS XE devices: Please see Cisco IOS-XE Software Availability

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 September 2011 Bundled Publication

15.1EY

Not vulnerable

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

15.1GC

Not vulnerable

Vulnerable; first fixed in Release 15.1T

15.1M

Not vulnerable

15.1(4)M2; Available on 30-SEP-11

15.1MR

Not vulnerable

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

15.1S

15.1(1)S1

15.1(2)S

Cisco IOS XE devices: Please see Cisco IOS-XE Software Availability

15.1(2)S2

15.1(3)S

Cisco IOS XE devices: Please see Cisco IOS-XE Software Availability

15.1T

15.1(1)T3

15.1(2)T2

15.1(3)T

15.1(1)T4 on 09-DEC-2011

15.1(2)T4

15.1(3)T2

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 September 2011 Bundled Publication

There are no affected 15.2-based releases

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 Release

First Fixed Release

First Fixed Release for All Advisories in the September 2011 Bundled Publication

2.1.x

Not vulnerable

Vulnerable; migrate to 3.3.2S or later

2.2.x

Not vulnerable

Vulnerable; migrate to 3.3.2S or later

2.3.x

Not vulnerable

Vulnerable; migrate to 3.3.2S or later

2.4.x

Not vulnerable

Vulnerable; migrate to 3.3.2S or later

2.5.x

Not vulnerable

Vulnerable; migrate to 3.3.2S or later

2.6.x

Not vulnerable

Vulnerable; migrate to 3.3.2S or later

3.1.xS

3.1.3S

Vulnerable; migrate to 3.3.2S or later

3.1.xSG

Not vulnerable

Vulnerable; migrate to 3.2.0SG or later

3.2.xS

3.2.1S

Vulnerable; migrate to 3.3.2S or later

3.2.xSG

Not vulnerable

Not vulnerable

3.3.xS

Not vulnerable

3.3.2S

3.4.xS

Not vulnerable

Not vulnerable

Cisco IOS XE と Cisco IOS 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、2011 年 9 月のバンドル公開で説明されているいずれの脆弱性の影響も受けません。

回避策

Control Plane Policing(CoPP; コントロール プレーン ポリシング)を使用して、有効なピアから送信された IP プロトコル 91 のパケットのみを許可することで回避できます。

ネットワーク内のシスコ デバイスに適用可能な他の対応策は、このアドバイザリの付属ドキュメントである『Cisco Applied Mitigation Bulletin』にて参照できます。 http://www.cisco.com/warp/public/707/cisco-amb-20110928-dlsw.shtml

コントロール プレーン ポリシング

コントロール プレーン ポリシング(CoPP)を使用すると、該当するデバイスに宛てられた信頼できない IP プロトコル 91 のパケットをブロックできます。CoPP 機能は、Cisco IOS ソフトウェアリリース 12.0S、12.2SX、12.2S、12.3T、12.4、および 12.4T にてサポートされています。管理およびコントロール プレーンを保護するために CoPP をデバイスに設定し、既存のセキュリティ ポリシーとコンフィギュレーションに従って認定されたトラフィックだけがインフラストラクチャ デバイス宛に送信されることを明示的に許可するよう設定した場合は、レート制限することで、インフラストラクチャへの直接攻撃のリスクとその効果を最小限に抑えることができます。次の例では、192.168.100.1 が信頼できるホストになります。この例は、ネットワークに実際に適用できます。



!-- Deny FST traffic on IP protocol 91 from trusted
!-- hosts to all IP addresses configured on all interfaces of the affected device
!-- so that it will be allowed by the CoPP feature


access-list 111 deny 91 host 192.168.100.1 any 


!-- Permit all other FST traffic on IP protocol 91
!-- sent to all IP addresses configured on all interfaces of the affected
!-- device so that it will be policed and dropped by the CoPP feature


access-list 111 permit 91 any any 


!-- Permit (Police or Drop)/Deny (Allow) all other Layer3
!-- and Layer4 traffic in accordance with existing security
!-- policies and configurations for traffic that is authorized
!-- to be sent to infrastructure devices

!-- Create a Class-Map for traffic to be policed by
!-- the CoPP feature


class-map match-all drop-fst-91-class
  match access-group 111


!-- Create a Policy-Map that will be applied to the
!-- Control-Plane of the device.


policy-map input-CoPP-policy
  class drop-fst-91-class
    drop


!-- Apply the Policy-Map to the Control-Plane of the
!-- device


control-plane
  service-policy input input-CoPP-policy

上記の CoPP の例では、「permit」アクションによってアクセス コントロール リスト エントリ(ACE)に該当し、攻撃である可能性のあるパケットは、policy-map の「drop」機能により廃棄されますが、一方、「deny」アクション(記載されていません)に該当するパケットは、policy-map の「drop」機能の影響を受けません。次に示すとおり、Cisco IOS トレイン 12.2S および 12.0S では、ポリシーマップの構文が異なることに注意してください。

policy-map input-CoPP-policy
  class drop-fst-91-class
    police 32000 1500 1500 conform-action drop exceed-action drop

CoPP 機能の詳細については、次を参照してください。 Control Plane Policing Implementation Best Practices

修正済みソフトウェアの入手

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 に記載のシスコのソフトウェア ライセンスの条項または、Cisco.com Downloads の 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、シスコのワールドワイド Web サイト上の 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、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

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/warp/public/707/cisco-sa-20110928-dlsw.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

2011-September-30

Update IOS Software table bundled publication first fixed information.

Revision 1.0

2011-September-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、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。