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Cisco IOS Software Authentication Proxy Vulnerability

Advisory ID: cisco-sa-20090923-auth-proxy

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20090923-auth-proxy

Revision 1.1

For Public Release 2009 September 23 16:00  UTC (GMT)


Summary

Cisco IOS® Software configured with Authentication Proxy for HTTP(S), Web Authentication or the consent feature, contains a vulnerability that may allow an unauthenticated session to bypass the authentication proxy server or bypass the consent webpage.

Cisco has released free software updates that address this vulnerability.

There are no workarounds that mitigate this vulnerability.

This advisory is posted at http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20090923-auth-proxy

Note: The September 23, 2009, Cisco IOS Security Advisory bundled publication includes eleven Security Advisories. Ten of the advisories address vulnerabilities in Cisco IOS Software, and one advisory addresses a vulnerability in Cisco Unified Communications Manager. Each advisory lists the releases that correct the vulnerability or vulnerabilities detailed in the advisory.

Individual publication links are in "Cisco Event Response: Semiannual Cisco IOS Software Advisory Bundled Publication" at the following link:

http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep09.html

Affected Products

Vulnerable Products

Devices running affected versions of Cisco IOS Software and configured with Authentication Proxy for HTTP(S) or Web Authentication or the consent feature are vulnerable.

To determine the Cisco IOS Software release that is running on a Cisco product, administrators can log in to the device and issue the show version command to display the system banner. The system banner confirms that the device is running Cisco IOS Software by displaying text similar to "Cisco Internetwork Operating System Software" or "Cisco IOS Software." The image name displays in parentheses, followed by "Version" and the Cisco IOS Software release name. Other Cisco devices do not have the show version command or may provide different output.

The following example identifies a Cisco product that is running Cisco IOS Software Release 12.3(26) with an installed image name of C2500-IS-L:

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 ©) 1986-2008 by cisco Systems, Inc.
 Compiled Mon 17-Mar-08 14:39 by dchih

 <output truncated>

The following example shows a product that is running Cisco IOS Software release 12.4(20)T with an image name of C1841-ADVENTERPRISEK9-M:

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 ©) 1986-2008 by Cisco Systems, Inc.
Compiled Thu 10-Jul-08 20:25 by prod_rel_team

<output truncated>

Additional information about Cisco IOS Software release naming conventions is available in "White Paper: Cisco IOS Reference Guide" at the following link: http://www.cisco.com/warp/public/620/1.html.

To determine if your device is configured with either Authentication Proxy for HTTP(S), Web Authentication or the consent feature, log into the device and issue the show running-config command.

The following example identifies firewall authentication proxy services using the ip auth-proxy under the proxy rule name example_auth_proxy_name:

Router#show running-config
<output truncated>

 ! ! Set up the aaa new model to use the authentication proxy. !

 aaa authorization auth-proxy default group

 ! ! Apply a name to the authentication proxy configuration rule. !

 ip auth-proxy name example_auth_proxy_name http

 ! ! Apply the authentication proxy rule at an interface. !

 interface e0 
  ip auth-proxy example_auth_proxy_name

 !

<output truncated>

The following example identifies firewall authentication proxy services running for HTTP under the proxy rule name example_auth_proxy_name, using the ip admission commands. This is the same configuration as Web Authentication:

Router#show running-config
<output truncated>

 ! ! Set up the aaa new model to use the authentication proxy. !

 aaa authorization auth-proxy default group

 ! ! Apply a name to the authentication proxy configuration rule. !

 ip admission name example_auth_proxy_name proxy http inactivity-time 60

 ! ! Apply the authentication proxy rule at an interface. !

 interface FastEthernet0/1
  ip admission example_auth_proxy_name

 !

 <output truncated>

The following example identifies a device configured with the consent feature under the consent rule name example_consent_rule:

Router#show running-config
<output truncated>

 ! ! Apply a name to the consent configuration rule. !

 ip admission name example_consent_rule consent

 ! ! Apply the consent rule at an interface. !

 interface FastEthernet 0/0 
  ip admission consent-rule_rule

 !

<output truncated>

Products Confirmed Not Vulnerable

The following products and features are not affected by this vulnerability:

  • Cisco IOS XR Software
  • Cisco IOS XE Software
  • Firewall Authentication Proxy for FTP and Telnet Sessions
  • Cisco IOS devices not configured with Authentication Proxy for HTTP(S) or the consent feature

No other Cisco products are currently known to be affected by this vulnerability.

Details

The Cisco IOS Firewall authentication proxy feature allows network administrators to apply specific security policies on a per-user basis. With the authentication proxy feature, users can log in to the network or access the Internet via HTTP, and their specific access profiles are automatically retrieved and applied from a CiscoSecure ACS, or other RADIUS or TACACS+ authentication server. The user profiles are active only when there is active traffic from the authenticated users. Web Authentication feature leverages the underlying authentication proxy feature.

The consent feature for Cisco IOS routers enables organizations to provide temporary Internet and corporate access to end users through their wired and wireless networks by presenting a consent webpage. The consent feature can be used with or without requesting a username and password, but still leverages the underlying authentication proxy feature.

This vulnerability allows a session to be permitted without first being authenticated by the authentication proxy, or to be permitted without first acknowledging the consent webpage. At least one successfully authenticated session or accepted consent session must exist for the vulnerability to be exposed. When this occurs, the RADIUS or TACACS+ server will show subsequent users as authenticated, all with the same username as the initial connection if performing authentication, regardless of the authentication information provided by the user and whether it was defined on the AAA server, and regardless of whether the password was correct.

This vulnerability is caused by a race condition in the code, and several conditions outside the control of a malicious user and must be met before this vulnerability could be exploited.

For further information on Authentication Proxy for HTTP see the Cisco IOS Security Configuration Guide, Release 12.4 "Configuring Authentication Proxy" at the following link: http://www.cisco.com/en/US/docs/ios/security/configuration/guide/sec_cfg_authen_prxy_external_docbase_0900e4b1805afd05_4container_external_docbase_0900e4b1807b01d5.html

For further information on Authentication Proxy for HTTPS see the Cisco IOS Security Configuration Guide, Release 12.4 "Firewall Support of HTTPS Authentication Proxy" at the following link: http://www.cisco.com/en/US/docs/ios/security/configuration/guide/sec_fwall_https_prxy_external_docbase_0900e4b1805afe18_4container_external_docbase_0900e4b1807b01d5.html

For further information on the consent feature see the Cisco IOS Security Configuration Guide, Securing User Services, Release 12.2SR "Consent Feature for Cisco IOS Routers" at the following link: http://www.cisco.com/en/US/docs/ios/sec_user_services/configuration/guide/sec_cons_feat_rtrs_ps6922_TSD_Products_Configuration_Guide_Chapter.html

For further information on the Web Authentication feature see the Catalyst 3750 Switch Software Configuration Guide, Release 12.2(50)SE "Configuring IEEE 802.1x Port-Based Authentication" at the following link: http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_50_se/configuration/guide/sw8021x.html#wp1401291

This vulnerability is documented in the following Cisco Bug ID: CSCsy15227 ( registered customers only) and has been assigned the Common Vulnerabilities and Exposures (CVE) identifier CVE-2009-2863.

Vulnerability Scoring Details

Cisco has provided scores for the vulnerability in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this Security Advisory is done in accordance with CVSS version 2.0.

CVSS is a standards-based scoring method that conveys vulnerability severity and helps determine urgency and priority of response.

Cisco has provided a base and temporal score. Customers can then compute environmental scores to assist in determining the impact of the vulnerability in individual networks.

Cisco has provided an FAQ to answer additional questions regarding CVSS at

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

Cisco has also provided a CVSS calculator to help compute the environmental impact for individual networks at

http://intellishield.cisco.com/security/alertmanager/cvss .

CSCsy15227: Cisco IOS Software Authentication Proxy Vulnerability

Calculate the environmental score of CSCsy15227

CVSS Base Score - 7.1

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Medium

None

Complete

None

None

CVSS Temporal Score - 5.9

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed

Impact

Successful exploitation of the vulnerability may result in an unauthenticated and unauthorized user bypassing the authentication proxy services offered in Cisco IOS Authentication Proxy for HTTP(S) and/or bypassing the consent accept webpage.

Software Versions and Fixes

When considering software upgrades, also consult http://www.cisco.com/go/psirt and any subsequent advisories to determine exposure and a complete upgrade solution.

In all cases, customers should exercise caution to be certain the devices to be upgraded contain sufficient memory and that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, contact the Cisco Technical Assistance Center (TAC) or your contracted maintenance provider for assistance.

Each row of the Cisco IOS Software table (below) names a Cisco IOS release train. If a given release train is vulnerable, then the earliest possible releases that contain the fix (along with the anticipated date of availability for each, if applicable) are listed in the "First Fixed Release" column of the table. The "Recommended Release" column indicates the releases which have fixes for all the published vulnerability at the time of this Advisory. A device running a release in the given train that is earlier than the release in a specific column (less than the First Fixed Release) is known to be vulnerable. Cisco recommends upgrading to a release equal to or later than the release in the "Recommended Releases" column of the table.

Major Release

Availability of Repaired Releases

Affected 12.0-Based Releases

First Fixed Release

Recommended Release

12.0

Not Vulnerable

 

12.0DA

Not Vulnerable

 

12.0DB

Releases up to and including 12.0(4)DB are not vulnerable.

Releases 12.0(7)DB and later are not vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.0DC

Releases up to and including 12.0(3)DC1 are not vulnerable.

Releases 12.0(7)DC and later are not vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.0S

Not Vulnerable

 

12.0SC

Not Vulnerable

 

12.0SL

Not Vulnerable

 

12.0SP

Not Vulnerable

 

12.0ST

Not Vulnerable

 

12.0SX

Not Vulnerable

 

12.0SY

Not Vulnerable

 

12.0SZ

Not Vulnerable

 

12.0T

Vulnerable; first fixed in 12.4

Releases up to and including 12.0(4)T1 are not vulnerable.

12.4(23b)

12.4(25b)

12.0W

Not Vulnerable

 

12.0WC

Releases prior to 12.0(5)WC4 are vulnerable, release 12.0(5)WC4 and later are not vulnerable

 

12.0WT

Not Vulnerable

 

12.0XA

Not Vulnerable

 

12.0XB

Not Vulnerable

 

12.0XC

Not Vulnerable

 

12.0XD

Not Vulnerable

 

12.0XE

Vulnerable; first fixed in 12.4

Releases up to and including 12.0(5)XE are not vulnerable.

12.4(23b)

12.4(25b)

12.0XF

Not Vulnerable

 

12.0XG

Not Vulnerable

 

12.0XH

Not Vulnerable

 

12.0XI

Not Vulnerable

 

12.0XJ

Not Vulnerable

 

12.0XK

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.0XL

Not Vulnerable

 

12.0XM

Not Vulnerable

 

12.0XN

Not Vulnerable

 

12.0XQ

Not Vulnerable

 

12.0XR

Vulnerable; first fixed in 12.4

Releases up to and including 12.0(6)XR are not vulnerable.

12.4(23b)

12.4(25b)

12.0XS

Not Vulnerable

 

12.0XT

Not Vulnerable

 

12.0XV

Not Vulnerable

 

Affected 12.1-Based Releases

First Fixed Release

Recommended Release

12.1

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.1AA

Not Vulnerable

 

12.1AX

Not Vulnerable

 

12.1AY

Releases up to and including 12.1(13)AY are not vulnerable.

Releases 12.1(22)AY1 and later are not vulnerable; first fixed in 12.2SE

12.2(50)SE3

12.2(52)SE; Available on 13-OCT-2009

12.1AZ

Not Vulnerable

 

12.1CX

Not Vulnerable

 

12.1DA

Not Vulnerable

 

12.1DB

Releases up to and including 12.1(3)DB1 are not vulnerable.

Releases 12.1(4)DB1 and later are not vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.1DC

Releases up to and including 12.1(4)DC are not vulnerable.

Releases 12.1(4)DC2 and later are not vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.1E

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

 

12.1EA

Releases up to and including 12.1(6)EA1a are not vulnerable.

Releases 12.1(8)EA1c and later are not vulnerable; first fixed in 12.2SE

12.2(50)SE3; Available on 13-OCT-2009

12.1EB

Not Vulnerable

 

12.1EC

Not Vulnerable

 

12.1EO

Not Vulnerable

 

12.1EU

Not Vulnerable

 

12.1EV

Not Vulnerable

 

12.1EW

Not Vulnerable

 

12.1EX

Vulnerable; first fixed in 12.4

Releases up to and including 12.1(2)EX are not vulnerable.

12.4(23b)

12.4(25b)

12.1EY

Not Vulnerable

 

12.1EZ

Not Vulnerable

 

12.1GA

Not Vulnerable

 

12.1GB

Not Vulnerable

 

12.1T

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.1XA

Not Vulnerable

 

12.1XB

Not Vulnerable

 

12.1XC

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.1XD

Not Vulnerable

 

12.1XE

Not Vulnerable

 

12.1XF

Not Vulnerable

 

12.1XG

Not Vulnerable

 

12.1XH

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.1XI

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.1XJ

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.1XL

Releases prior to 12.1(3a)XL2 are vulnerable, release 12.1(3a)XL2 and later are not vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.1XM

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.1XP

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.1XQ

Not Vulnerable

 

12.1XR

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.1XS

Not Vulnerable

 

12.1XT

Vulnerable; first fixed in 12.4

Releases up to and including 12.1(2)XT2 are not vulnerable.

12.4(23b)

12.4(25b)

12.1XU

Not Vulnerable

 

12.1XV

Not Vulnerable

 

12.1XW

Not Vulnerable

 

12.1XX

Not Vulnerable

 

12.1XY

Not Vulnerable

 

12.1XZ

Not Vulnerable

 

12.1YA

Not Vulnerable

 

12.1YB

Vulnerable; first fixed in 12.4

Releases up to and including 12.1(5)YB are not vulnerable.

12.4(23b)

12.4(25b)

12.1YC

Not Vulnerable

 

12.1YD

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.1YE

Releases prior to 12.1(5)YE6 are vulnerable, release 12.1(5)YE6 and later are not vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.1YF

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.1YH

Not Vulnerable

 

12.1YI

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

 

12.1YJ

Not Vulnerable

 

Affected 12.2-Based Releases

First Fixed Release

Recommended Release

12.2

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2B

Vulnerable; first fixed in 12.4

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

12.4(23b)

12.4(25b)

12.2BC

Not Vulnerable

 

12.2BW

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2BX

Not Vulnerable

 

12.2BY

Not Vulnerable

 

12.2BZ

Not Vulnerable

 

12.2CX

Not Vulnerable

 

12.2CY

Not Vulnerable

 

12.2CZ

Vulnerable; migrate to any release in 12.2SB

12.2(31)SB16

12.2(33)SB7

12.2DA

Not Vulnerable

 

12.2DD

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2DX

Not Vulnerable

 

12.2EW

Not Vulnerable

 

12.2EWA

Not Vulnerable

 

12.2EX

Vulnerable; first fixed in 12.2SE

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

12.2(50)SE3

12.2(52)SE; Available on 13-OCT-2009

12.2EY

Vulnerable; first fixed in 12.2SE

Releases up to and including 12.2(25)EY4 are not vulnerable.

12.2(50)SE3

12.2(52)SE; Available on 13-OCT-2009

12.2EZ

Not Vulnerable

 

12.2FX

Not Vulnerable

 

12.2FY

Not Vulnerable

 

12.2FZ

Vulnerable; first fixed in 12.2SE

12.2(50)SE3

12.2(52)SE; Available on 13-OCT-2009

12.2IRA

Vulnerable; first fixed in 12.2SRD

12.2(33)SRD3

12.2IRB

Vulnerable; first fixed in 12.2SRD

12.2(33)SRD3

12.2IRC

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

 

12.2IXA

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

 

12.2IXB

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

 

12.2IXC

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

 

12.2IXD

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

 

12.2IXE

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

 

12.2IXF

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

 

12.2IXG

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

 

12.2IXH

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

 

12.2JA

Not Vulnerable

 

12.2JK

Not Vulnerable

 

12.2MB

Not Vulnerable

 

12.2MC

Not Vulnerable

 

12.2S

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

12.2(31)SB16

12.2(33)SB7

12.2SB

Not Vulnerable

 

12.2SBC

Note: Releases prior to 12.2(27)SBC3 are vulnerable, release 12.2(27)SBC3 and later are not vulnerable;

12.2(31)SB16

12.2(33)SB7

12.2SCA

Not Vulnerable

 

12.2SCB

Not Vulnerable

 

12.2SE

12.2(50)SE3

12.2(52)SE; Available on 13-OCT-2009

12.2(50)SE3

12.2(52)SE; Available on 13-OCT-2009

12.2SEA

Not Vulnerable

 

12.2SEB

Not Vulnerable

 

12.2SEC

Vulnerable; first fixed in 12.2SE

12.2(50)SE3

12.2(52)SE; Available on 13-OCT-2009

12.2SED

Vulnerable; first fixed in 12.2SE

12.2(50)SE3

12.2(52)SE; Available on 13-OCT-2009

12.2SEE

Vulnerable; first fixed in 12.2SE

12.2(50)SE3

12.2(52)SE; Available on 13-OCT-2009

12.2SEF

Releases prior to 12.2(25)SEF2 are vulnerable, release 12.2(25)SEF2 and later are not vulnerable; first fixed in 12.2SE

12.2(50)SE3

12.2(52)SE; Available on 13-OCT-2009

12.2SEG

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

12.2(50)SE3

12.2(52)SE; Available on 13-OCT-2009

12.2SG

12.2(50)SG4

12.2(53)SG1; Available on 07-DEC-2009

12.2(50)SG4

12.2SGA

12.2(31)SGA11; Available on 04-DEC-2009

12.2(31)SGA11; Available on 04-DEC-2009

12.2SL

Not Vulnerable

 

12.2SM

Not Vulnerable

 

12.2SO

Not Vulnerable

 

12.2SQ

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

 

12.2SRA

Vulnerable; first fixed in 12.2SRD

12.2(33)SRD3

12.2SRB

Vulnerable; first fixed in 12.2SRD

12.2(33)SRD3

12.2SRC

12.2(33)SRC5; Available on 29-OCT-2009

12.2(33)SRD3

12.2SRD

12.2(33)SRD2a

12.2(33)SRD3

12.2(33)SRD3

12.2STE

Not Vulnerable

 

12.2SU

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2SV

Not Vulnerable

 

12.2SVA

Not Vulnerable

 

12.2SVC

Not Vulnerable

 

12.2SVD

Not Vulnerable

 

12.2SVE

Not Vulnerable

 

12.2SW

Not Vulnerable

 

12.2SX

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

 

12.2SXA

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

 

12.2SXB

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

 

12.2SXD

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

 

12.2SXE

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

 

12.2SXF

12.2(18)SXF17; Available on 30-SEP-2009

Please see IOS Software Modularity Patch

12.2(18)SXF17; Available on 30-SEP-2009

12.2SXH

12.2(33)SXH6; Available on 30-OCT-2009

Please see IOS Software Modularity Patch

12.2(33)SXH6; Available on 30-OCT-2009

12.2SXI

12.2(33)SXI2

12.2(33)SXI2a

12.2(33)SXI2a

12.2SY

Not Vulnerable

 

12.2SZ

Not Vulnerable

 

12.2T

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2TPC

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

 

12.2XA

Vulnerable; first fixed in 12.4

Releases up to and including 12.2(1)XA are not vulnerable.

12.4(23b)

12.4(25b)

12.2XB

Vulnerable; first fixed in 12.4

Releases up to and including 12.2(2)XB1 are not vulnerable.

12.4(23b)

12.4(25b)

12.2XC

Not Vulnerable

 

12.2XD

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2XE

Not Vulnerable

 

12.2XF

Not Vulnerable

 

12.2XG

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2XH

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2XI

Not Vulnerable

 

12.2XJ

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2XK

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2XL

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2XM

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2XNA

Not Vulnerable

 

12.2XNB

Not Vulnerable

 

12.2XNC

Not Vulnerable

 

12.2XND

Not Vulnerable

 

12.2XO

Vulnerable; first fixed in 12.2SG

12.2(31)SGA11

12.2(50)SG4

12.2XQ

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2XR

Not Vulnerable

 

12.2XS

Not Vulnerable

 

12.2XT

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2XU

Not Vulnerable

 

12.2XV

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2XW

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2YA

Releases prior to 12.2(4)YA8 are vulnerable, release 12.2(4)YA8 and later are not vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2YB

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

 

12.2YD

Not Vulnerable

 

12.2YE

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

 

12.2YF

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

 

12.2YG

Not Vulnerable

 

12.2YH

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

 

12.2YK

Not Vulnerable

 

12.2YL

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

 

12.2YM

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2YN

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

 

12.2YO

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

 

12.2YP

Not Vulnerable

 

12.2YQ

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

 

12.2YR

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

 

12.2YS

Not Vulnerable

 

12.2YT

Not Vulnerable

 

12.2YU

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

 

12.2YW

Not Vulnerable

 

12.2YX

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

 

12.2YY

Not Vulnerable

 

12.2YZ

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

 

12.2ZA

Not Vulnerable

 

12.2ZB

Not Vulnerable

 

12.2ZC

Not Vulnerable

 

12.2ZD

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

 

12.2ZE

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2ZF

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2ZG

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2ZH

Releases prior to 12.2(13)ZH6 are vulnerable, release 12.2(13)ZH6 and later are not vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.2ZJ

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

 

12.2ZP

Not Vulnerable

 

12.2ZU

Vulnerable; first fixed in 12.2SXH

12.2(33)SXH6; Available on 30-OCT-2009

12.2ZX

Not Vulnerable

 

12.2ZY

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

 

12.2ZYA

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

 

Affected 12.3-Based Releases

First Fixed Release

Recommended Release

12.3

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.3B

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.3BC

Not Vulnerable

 

12.3BW

Not Vulnerable

 

12.3EU

Not Vulnerable

 

12.3JA

Not Vulnerable

 

12.3JEA

Not Vulnerable

 

12.3JEB

Not Vulnerable

 

12.3JEC

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 12.4

12.4(23b)

12.4(25b)

12.3JL

Not Vulnerable

 

12.3JX

Not Vulnerable

 

12.3T

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.3TPC

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

 

12.3VA

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.3XA

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.3XB

Not Vulnerable

 

12.3XC

Releases prior to 12.3(2)XC4 are vulnerable, release 12.3(2)XC4 and later are not vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.3XD

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.3XE

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.3XF

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

 

12.3XG

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.3XI

Not Vulnerable

 

12.3XJ

Not Vulnerable

 

12.3XK

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.3XL

Vulnerable; first fixed in 12.4T

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.3XQ

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.3XR

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.3XS

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.3XU

Not Vulnerable

 

12.3XW

Not Vulnerable

 

12.3XX

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.3XY

Not Vulnerable

 

12.3XZ

Not Vulnerable

 

12.3YA

Vulnerable; first fixed in 12.4

12.4(23b)

12.4(25b)

12.3YD

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.3YF

Not Vulnerable

 

12.3YG

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.3YH

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.3YI

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.3YJ

Not Vulnerable

 

12.3YK

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.3YM

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.3YQ

Not Vulnerable

 

12.3YS

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.3YT

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.3YU

Not Vulnerable

 

12.3YX

Not Vulnerable

 

12.3YZ

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

 

12.3ZA

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

Affected 12.4-Based Releases

First Fixed Release

Recommended Release

12.4

12.4(23a)

12.4(25a)

12.4(23b)

12.4(25b)

12.4GC

Not Vulnerable

 

12.4JA

Not Vulnerable

 

12.4JDA

Not Vulnerable

 

12.4JDC

Not Vulnerable

 

12.4JDD

Not Vulnerable

 

12.4JK

Not Vulnerable

 

12.4JL

Not Vulnerable

 

12.4JMA

Not Vulnerable

 

12.4JMB

Not Vulnerable

 

12.4JX

Not Vulnerable

 

12.4MD

Not Vulnerable

 

12.4MDA

Not Vulnerable

 

12.4MR

Releases prior to 12.4(19)MR1 are vulnerable, release 12.4(19)MR1 and later are not vulnerable

 

12.4SW

Not Vulnerable

 

12.4T

12.4(24)T1

12.4(20)T3

12.4(22)T2

12.4(15)T9

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.4XA

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.4XB

Not Vulnerable

 

12.4XC

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.4XD

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.4XE

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.4XF

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.4XG

Not Vulnerable

 

12.4XJ

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.4XK

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.4XL

Not Vulnerable

 

12.4XM

Not Vulnerable

 

12.4XN

Not Vulnerable

 

12.4XP

Not Vulnerable

 

12.4XQ

Not Vulnerable

 

12.4XR

Not Vulnerable

 

12.4XT

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.4XV

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

 

12.4XW

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.4XY

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.4XZ

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.4YA

Vulnerable; first fixed in 12.4T

12.4(15)T10

12.4(20)T4

12.4(22)T3

12.4(24)T2; Available on 23-OCT-2009

12.4YB

12.4(22)YB4

12.4(22)YB4

12.4YD

Not Vulnerable

 

12.4YE

Not Vulnerable

 

Cisco IOS Software Modularity - Maintenance Packs

Customers who are using Cisco IOS Software Modularity can apply the respective maintenance packs. More information on Cisco IOS Software Modularity can be found at the following link: http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/prod_bulletin0900aecd80313e15.html

The Maintenance Packs listed below can be downloaded at http://www.cisco.com/go/pn

Cisco IOS Software Modularity Maintenance Pack for 12.2SXF

Cisco IOS Software Release

Solution Maintenance Pack(MP)

12.2(18)SXF14

MP001

12.2(18)SXF15

MP001

12.2(18)SXF16

MP001

Cisco IOS Software Modularity Maintenance Pack for 12.2SXH

Cisco IOS Software Release

Solution Maintenance Pack(MP)

12.2(33)SXH5

MP001

Workarounds

There are no workarounds for this vulnerability.

Obtaining Fixed Software

Cisco has released free software updates that address this vulnerability. Prior to deploying software, customers should consult their maintenance provider or check the software for feature set compatibility and known issues specific to their environment.

Customers may only install and expect support for the feature sets they have purchased. By installing, downloading, accessing or otherwise using such software upgrades, customers agree to be bound by the terms of Cisco's software license terms found at http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html, or as otherwise set forth at Cisco.com Downloads at http://www.cisco.com/public/sw-center/sw-usingswc.shtml.

Do not contact psirt@cisco.com or security-alert@cisco.com for software upgrades.

Customers with Service Contracts

Customers with contracts should obtain upgraded software through their regular update channels. For most customers, this means that upgrades should be obtained through the Software Center on Cisco's worldwide website at http://www.cisco.com.

Customers with Service Contracts

Customers using Third Party Support Organizations

Customers whose Cisco products are provided or maintained through prior or existing agreements with third-party support organizations, such as Cisco Partners, authorized resellers, or service providers should contact that support organization for guidance and assistance with the appropriate course of action in regards to this advisory.

The effectiveness of any workaround or fix is dependent on specific customer situations, such as product mix, network topology, traffic behavior, and organizational mission. Due to the variety of affected products and releases, customers should consult with their service provider or support organization to ensure any applied workaround or fix is the most appropriate for use in the intended network before it is deployed.

Customers without Service Contracts

Customers who purchase direct from Cisco but do not hold a Cisco service contract, and customers who purchase through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should acquire upgrades by contacting the Cisco Technical Assistance Center (TAC). TAC contacts are as follows.

  • +1 800 553 2447 (toll free from within North America)
  • +1 408 526 7209 (toll call from anywhere in the world)
  • e-mail: tac@cisco.com

Customers should have their product serial number available and be prepared to give the URL of this notice as evidence of entitlement to a free upgrade. Free upgrades for non-contract customers must be requested through the TAC.

Refer to http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html for additional TAC contact information, including localized telephone numbers, and instructions and e-mail addresses for use in various languages.

Exploitation and Public Announcements

The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory.

This vulnerability was discovered by Cisco during internal testing. The Cisco PSIRT is not aware of malicious exploitation of this vulnerability, although we are aware of some customers who have seen this vulnerability triggered within their infrastructures.

Status of this Notice: Final

THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.

A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors.


Distribution

This advisory is posted on Cisco's worldwide website at :

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20090923-auth-proxy

In addition to worldwide web posting, a text version of this notice is clear-signed with the Cisco PSIRT PGP key and is posted to the following e-mail and Usenet news recipients.

  • 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

Future updates of this advisory, if any, will be placed on Cisco's worldwide website, but may or may not be actively announced on mailing lists or newsgroups. Users concerned about this problem are encouraged to check the above URL for any updates.


Revision History

Revision 1.1

2009-October-19

Updated ION software table.

Revision 1.0

2009-September-23

Initial public release

Cisco Security Procedures

Complete information on reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco, is available on Cisco's worldwide website at http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html. This includes instructions for press inquiries regarding Cisco security notices. All Cisco security advisories are available at http://www.cisco.com/go/psirt.