Cisco Security Advisory: Cisco IOS Software Command Authorization Bypass

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-pai

http://www.cisco.com/cisco/web/support/JP/111/1110/1110699_cisco-sa-20120328-pai-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 ソフトウェアには、リモートのアプリケーションまたはデバイスが Authentication, Authorization, and Accounting(AAA)許可を使用した場合に、許可レベルを超えることのできる脆弱性が存在します。この脆弱性は、Cisco IOS デバイス上で HTTP または HTTPS サーバが有効な場合に発生します。

Cisco IOS ソフトウェアを実行していない製品は脆弱性の影響を受けません。

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。 

このアドバイザリにある脆弱性の回避策として、HTTP サーバを無効化することも可能です。

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/111/1110/1110699_cisco-sa-20120328-pai-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

Cisco IOS ソフトウェア リリース 12.2 以降を実行しており、HTTP または HTTPS サーバが設定されているデバイスは、AAA 許可を使用している場合にこの脆弱性の影響を受けます。 
HTTP または HTTPS サーバが設定されているかを確認するには、show ip http server status | include status コマンドを実行します。次の例では、HTTPS サーバが有効で HTTP サーバが無効になっている Cisco IOS デバイスを示します。
    Router> show ip http server status | include status
     HTTP server status: Disabled
     HTTP secure server status: Enabled
    
AAA 許可が使用されているかを確認するには、管理者はデバイスにログインして特権 EXEC モードで show run | include aaa authorization コマンドを実行します。次の例にあるように aaa authorization commands が表示された場合、AAA 許可は設定されています。
    Router# show run | include aaa authorization commands
     aaa authorization commands 0 default local group tacacs+
     aaa authorization commands 1 default group tacacs+
     aaa authorization commands 15 default local
    

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。「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 Cisco IOS ソフトウェア リリース 15.0(1)M1 が稼働し、インストールされているイメージ名が C3900-UNIVERSALK9-M であることを示しています。

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
!--- 出力は省略されています。 

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にある「White Paper: 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

Cisco IOS または IOS XE ソフトウェアを実行していない場合は、この脆弱性の影響を受けません。AAA 許可を使用していないデバイス、もしくは HTTP または HTTPS サーバのどちらも設定されていないデバイスは、この脆弱性の影響を受けません。 

Cisco IOS XR 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

Cisco IOS ソフトウェアでは、HTTP または HTTPS 接続によって Cisco IOS ソフトウェアを実行するデバイスの管理と監視をリモート アプリケーションから行うことができます。 

Cisco IOS コマンド許可をバイパスする脆弱性が存在するため、認証されたリモートの HTTP または HTTPS セッションは、許可レベルに対応するすべての Cisco IOS コマンドを実行できるようになります。この脆弱性では、認証されていないアクセスが許可されることはありません。この脆弱性を不正利用するには、有効なユーザ名とパスワ・[ドが必要です。さらに、この脆弱性を利用しても、権限レベルに設定されていないコマンドを実行することはできません。

HTTP サーバは、クラスタ構成において初期設定されているほか、Catalyst 3700 シリーズ、Catalyst 3750 シリーズ、Catalyst 3550 シリーズ、Catalyst 3560 シリーズ、および Catalyst 2950 シリーズの Cisco スイッチで初期設定されています。

AAA 許可の詳細は、次のリンクで確認できます。http://www.cisco.com/en/US/docs/ios/12_2t/secure/command/reference/sftauth.html

Cisco IOS ソフトウェア リリース 12.2 以降のリリースには、脆弱性が存在する可能性があります。詳細は次のリリース表でご確認ください。

この脆弱性は、Cisco Bug ID CSCtr91106登録ユーザのみ)として文書化され、Common Vulnerabilities and Exposures(CVE)ID として CVE-2012-0384 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

 

Command Authorization Fails for commands delivered over HTTP

Calculate the environmental score of CSCtr91106

CVSS Base Score - 8.5

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Medium

Single

Complete

Complete

Complete

CVSS Temporal Score - 7.0

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、Cisco IOS コマンド許可がバイパスされる可能性があり、認証されたリモートの HTTP または HTTPS セッションは許可レベルに対応するすべての Cisco IOS コマンドを実行できるようになります。

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
There are no affected 12.0 based releases
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 Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2B Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2BC Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2BW Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2BX Not vulnerable
Vulnerable; First fixed in Release 12.2SB
12.2BY Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2BZ Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2CX Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2CY Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2CZ Not vulnerable
Vulnerable; First fixed in Release 12.0S
12.2DA Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2DD Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2DX Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2EU Not vulnerable
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.
Releases up to and including 12.2(20)EWA4 are not vulnerable.
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.
Releases up to and including 12.2(20)EWA4 are not vulnerable.
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
Releases up to and including 12.2(25)EX1 are not vulnerable.
Vulnerable; First fixed in Release 15.0SE
12.2EY 12.2(52)EY4
12.2(58)EY2
12.2(52)EY4
12.2EZ Vulnerable; First fixed in Release 15.0SE
Vulnerable; First fixed in Release 15.0SE
12.2FX Vulnerable; First fixed in Release 12.2SE
Vulnerable; First fixed in Release 15.0SE
12.2FY Vulnerable; First fixed in Release 15.0SE
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 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2IRB Vulnerable; First fixed in Release 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2IRC Vulnerable; First fixed in Release 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2IRD Vulnerable; First fixed in Release 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2IRE Vulnerable; First fixed in Release 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2IRF Vulnerable; First fixed in Release 12.2SRD
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 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
Not vulnerable
12.2JK Not vulnerable
Not vulnerable
12.2MB Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2MC Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2MRA Vulnerable; First fixed in Release 12.2SRD
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 Not vulnerable
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 Not vulnerable
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 Vulnerable; First fixed in Release 12.2SE
Vulnerable; First fixed in Release 15.0SE
12.2SEG 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; First fixed in Release 12.2SG
Vulnerable; contact your support organization per the instructions in 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 Obtaining Fixed Software section of this advisory.
12.2SO Not vulnerable
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 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2SRB Vulnerable; First fixed in Release 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2SRC Vulnerable; First fixed in Release 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2SRD 12.2(33)SRD8
Vulnerable; First fixed in Release 12.2SRE
12.2SRE 12.2(33)SRE6
12.2(33)SRE6
12.2STE 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.
12.2SU Not vulnerable
Vulnerable; First fixed in Release 15.0M
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
Vulnerable; First fixed in Release 12.4T
12.2SX Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXA Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXB Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXD Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXE Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXF Not vulnerable
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
Releases up to and including 12.2(14)SY5 are not vulnerable.
12.2(50)SY2; Available on 11-JUN-12
12.2SZ Not vulnerable
Vulnerable; First fixed in Release 12.0S
12.2T Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2TPC Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2XA Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XB Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XC Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XD Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XE Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XF Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XG Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XH Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XI Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XJ Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XK Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XL Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XM Not vulnerable
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; First fixed in Release 12.2SG
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2XQ Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XR Not vulnerable
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 Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XT Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XU Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XV Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XW Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2YA Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2YC Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YD Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YE Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YK Not vulnerable
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; First fixed in Release 15.0M
Releases up to and including 12.2(8)YP are not vulnerable.
12.2YT Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YW Not vulnerable
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 Not vulnerable
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; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZB Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZC Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZD Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZE Not vulnerable
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 Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZP Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZU Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZX Not vulnerable
Vulnerable; First fixed in Release 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 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 Vulnerable; First fixed in Release 12.4JA
Vulnerable; First fixed in Release 12.4JA
12.3JEA 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.
12.3JEB 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.
12.3JEC 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.
12.3JED 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.
12.3JK Vulnerable; First fixed in Release 12.4
Vulnerable; First fixed in Release 15.0M
12.3JL 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.
12.3JX 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 12.4(23c)JA4
12.4(25d)JA2; Available on 01-AUG-12
12.4(25e)JA
12.4(23c)JA412.4(25e)JA
12.4JAX Vulnerable; First fixed in Release 12.4JA
Vulnerable; First fixed in Release 12.4JA
12.4JDA 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.
12.4JDC 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.
12.4JDD 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.
12.4JDE 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.
12.4JHA 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.
12.4JHB 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.
12.4JHC 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.
12.4JK 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.
12.4JL 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.
12.4JX Vulnerable; First fixed in Release 12.4JA
Vulnerable; First fixed in Release 12.4JA
12.4JY Vulnerable; First fixed in Release 12.4JA
Vulnerable; First fixed in Release 12.4JA
12.4JZ Vulnerable; First fixed in Release 12.4JA
Vulnerable; First fixed in Release 12.4JA
12.4MD 12.4(22)MD3; Available on 30-MAR-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 15.0(1)SY1
15.0(1)SY1
15.0XA Vulnerable; First fixed in Release 15.1T
Vulnerable; First fixed in Release 15.1T
15.0XO Vulnerable; First fixed in Release 15.0SG Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
Vulnerable; First fixed in Release 15.0SG 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)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)S2 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
Not vulnerable
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)T4
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 15.2(1)S1 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)T215.2(2)T115.2(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 3.1.2S or later. Vulnerable; migrate to 3.4.2S or later.
2.2.x Vulnerable; migrate to 3.1.2S or later. Vulnerable; migrate to 3.4.2S or later.
2.3.x Vulnerable; migrate to 3.1.2S or later. Vulnerable; migrate to 3.4.2S or later.
2.4.x Vulnerable; migrate to 3.1.2S or later. Vulnerable; migrate to 3.4.2S or later.
2.5.x Vulnerable; migrate to 3.1.2S or later. Vulnerable; migrate to 3.4.2S or later.
2.6.x Vulnerable; migrate to 3.1.2S or later. Vulnerable; migrate to 3.4.2S or later.
3.1.xS 3.1.2S 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 3.4.2S 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 3.4.2S or later. Vulnerable; migrate to 3.4.2S or later.
3.2.xSG Not vulnerable Not vulnerable
3.4.xS 3.4.2S 3.4.2S
3.5.xS 3.5.1S 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

HTTP および HTTPS サーバが不要な場合、no ip http server コマンドおよび no ip http secure-server コマンドで無効化できます。

ただし、Web サービスが必要な場合は、12.3(14)T 以降であれば選択した HTTP および HTTPS サービスを有効化/無効化する機能を利用できます。WEB_EXEC サービスは、デバイスの認定と現在の状態の取得をリモート クライアントから行える機能を提供します。

他の HTTP サービスを有効にしたままで、WEB_EXEC サービスを無効にすることができます。WEB_EXEC サービスが不要な場合は、次の手順に従って無効化することが可能です。
  1. すべてのセッション モジュールのリストを確認します。
      Router# show ip http server session-module
      HTTP server application session modules:
      Session module Name  Handle Status   Secure-status  Description
      HTTP_IFS              1      Active   Active         HTTP based IOS File Server
      HOME_PAGE             2      Active   Active         IOS Homepage Server
      QDM                   3      Active   Active         QOS Device Manager Server
      QDM_SA                4      Active   Active         QOS Device Manager Signed Applet Server
      WEB_EXEC              5      Active   Active         HTTP based IOS EXEC Server
      IXI                   6      Active   Active         IOS XML Infra Application Server
      IDCONF                7      Active   Active         IDCONF HTTP(S) Server
      XSM                   8      Active   Active         XML Session Manager
      VDM                   9      Active   Active         VPN Device Manager Server
      XML_Api               10     Active   Active         XML Api
      ITS                   11     Active   Active         IOS Telephony Service
      ITS_LOCDIR            12     Active   Active         ITS Local Directory Search
      CME_SERVICE_URL       13     Active   Active         CME Service URL
      CME_AUTH_SRV_LOGIN    14     Active   Active         CME Authentication Server
      IPS_SDEE              15     Active   Active         IOS IPS SDEE Server
      tti-petitioner        16     Active   Active         TTI Petitioner
  2. 必要なセッション モジュールのリストを作成します。この例では、WEB_EXEC 以外のモジュールすべてが含まれています。
      Router# configuration terminal
      Router(config)# ip http session-module-list exclude_webexec 
      
      HTTP_IFS,HOME_PAGE,QDM,QDM_SA,IXI,IDCONF,XSM,VDM,XML_Api,
      ITS,ITS_LOCDIR,CME_SERVICE_URL,CME_AUTH_SRV_LOGIN,IPS_SDEE,tti-petitioner
  3. リモート クライアントからの受信 HTTP リクエストを処理する HTTP/HTTPS アプリケーションを選択して有効にします。
      Router(config)# ip http active-session-modules exclude_webexec
      Router(config)# ip http secure-active-session-modules exclude_webexec
      Router(config)# exit
  4. すべてのセッション モジュールのリストを確認し、WEB_EXEC が無効であることを確かめます。
      Router# show ip http server session-module 
      HTTP server application session modules: 
      Session module Name  Handle Status   Secure-status  Description 
      HTTP_IFS              1      Active   Active         HTTP based IOS File Server 
      HOME_PAGE             2      Active   Active         IOS Homepage Server 
      QDM                   3      Active   Active         QOS Device Manager Server 
      QDM_SA                4      Active   Active         QOS Device Manager Signed Applet Server 
      WEB_EXEC              5      Inactive Inactive       HTTP based IOS EXEC Server 
      IXI                   6      Active   Active         IOS XML Infra Application Server 
      IDCONF                7      Active   Active         IDCONF HTTP(S) Server 
      XSM                   8      Active   Active         XML Session Manager 
      VDM                   9      Active   Active         VPN Device Manager Server 
      XML_Api               10     Active   Active         XML Api 
      ITS                   11     Active   Active         IOS Telephony Service 
      ITS_LOCDIR            12     Active   Active         ITS Local Directory Search 
      CME_SERVICE_URL       13     Active   Active         CME Service URL 
      CME_AUTH_SRV_LOGIN    14     Active   Active         CME Authentication Server 
      IPS_SDEE              15     Active   Active         IOS IPS SDEE Server 
      tti-petitioner        16     Active   Active         TTI Petitioner 
      
HTTP またはセキュア HTTP サーバを使用するアプリケーションの選択的な有効化の詳細は、次のリンクの『Cisco IOS Network Management Configuration Guide, release 12.4T』を参照してください。http://www.cisco.com/en/US/docs/ios/netmgmt/configuration/guide/nm_http_app_enable.html

HTTP サーバと WEB_EXEC サービスが必要な場合の推奨ベスト プラクティスは、信頼できるソースのみを許可するよう、HTTP サーバにアクセスできるホストを制限することです。HTTP サーバには、アクセスを許可するホストを制限するアクセス リストが適用できます。HTTP サーバにアクセス リストを適用するには、次のコマンドをグローバル コンフィギュレーション モードで実行します。ip http access-class {access-list-number | access-list-name}

次の例では、信頼できるホストのみが Cisco IOS HTTP サーバにアクセスできるようにするアクセス リストを示します。
    ip access-list standard 20
         permit 192.168.1.0 0.0.0.255
         remark "Above is a trusted subnet"
         remark "Add further trusted subnets or hosts below"
        
    !(注:その他のすべてのアクセスは黙示的に拒否されます。) ! (アクセスリストを http サーバに適用します。)
    ip http access-class 20
Cisco IOS HTTP サーバの設定の詳細は、『Using the Cisco Web Browser User Interface』を参照してください。

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、機器の通常運用中にこの問題が発生したお客様から Cisco TAC に報告されたものです。

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/111/1110/1110699_cisco-sa-20120328-pai-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。