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Cisco IOS Software Network Address Translation Vulnerabilities

Advisory ID: cisco-sa-20100922-nat

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20100922-nat

Revision 1.1

Last Updated  2012 September 21 19:14  UTC (GMT)

For Public Release 2010 September 22 16:00  UTC (GMT)


Summary

The Cisco IOS® Software Network Address Translation functionality contains three denial of service (DoS) vulnerabilities. The first vulnerability is in the translation of Session Initiation Protocol (SIP) packets, the second vulnerability in the translation of H.323 packets and the third vulnerability is in the translation of H.225.0 call signaling for H.323 packets.

Cisco has released free software updates that address these vulnerabilities.

This advisory is posted at http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20100922-nat.

Note: The September 22, 2010, Cisco IOS Software Security Advisory bundled publication includes six Cisco Security Advisories. Five of the advisories address vulnerabilities in Cisco IOS Software, and one advisory addresses vulnerabilities in Cisco Unified Communications Manager. Each advisory lists the releases that correct the vulnerability or vulnerabilities detailed in the advisory. The table at the following URL lists releases that correct all Cisco IOS Software vulnerabilities that have been published on September 22, 2010, or earlier:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20100922-bundle

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

http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep10.html

Affected Products

Vulnerable Products

Cisco devices running Cisco IOS Software that are configured for NAT and that support NAT for SIP, H.323, or H.225.0 call signaling for H.323 packets are affected.

To verify whether NAT is enabled on a Cisco IOS device log in to the device and issue the show ip nat statistics command. The following example shows a device that is configured with NAT:

Router#show ip nat statistics

Total translations: 2 (0 static, 2 dynamic; 0 extended)
Outside interfaces: Serial0
Inside interfaces: Ethernet1
Hits: 135  Misses: 5
Expired translations: 2
Dynamic mappings:
-- Inside Source
access-list 1 pool mypool refcount 2
 pool mypool: netmask 255.255.255.0
        start 192.168.10.1 end 192.168.10.254
        type generic, total addresses 14, allocated 2 (14%), misses 0

Alternatively, administrators can use the show running-config | include ip nat command to verify if NAT has been enabled on the router interfaces.

For NAT to be enabled in a router either the ip nat inside and ip nat outside commands must be present in different interfaces or, in the case of NAT Virtual Interface, if the ip nat enable interface command is present.

In order to determine the software that runs on a Cisco IOS product, log in to the device and issue the show version command to display the system banner. Cisco IOS software identifies itself as "Internetwork Operating System Software" or simply "IOS." On the next line of output, the image name displays between parentheses, followed by "Version" and the Cisco IOS release name. Other Cisco devices do not have the show version command or give different output.

The following example shows output from a device that runs an IOS image:

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

<More output removed for brevity>

Products Confirmed Not Vulnerable

Cisco IOS devices not explicitly configured for NAT are not vulnerable.

Cisco IOS XE Software is not affected by these vulnerabilities.

Cisco IOS XR Software is not affected by these vulnerabilities.

No other Cisco products are currently known to be affected by these vulnerabilities.

Details

The three vulnerabilities are triggered by transit traffic that needs to be processed by the NAT feature. Each vulnerability is independent of each other.

NAT for SIP DoS Vulnerability

SIP is a popular signaling protocol that is used to manage voice and video calls across IP networks such as the Internet. SIP is responsible for handling all aspects of call setup and termination. Voice and video are the most popular types of sessions that SIP handles, but the protocol has the flexibility to accommodate other applications that require call setup and termination.

NAT for SIP translates packets using UDP (port 5060) or TCP (port 5060) as the underlying transport protocol. The NAT for SIP DoS vulnerability can be exploited only with the use of UDP port 5060 packets.

This vulnerability is documented in Cisco bug ID CSCtf17624 ( registered customers only) and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2010-2831.

NAT for H.323 DoS Vulnerability

H.323 is the International Telecommunication Union (ITU) standard for real-time multimedia communications and conferencing over packet-based (IP) networks.

NAT for H.323 translates packets on TCP port 1720. There is a DoS vulnerability in the NAT procession of H.323 packets. The vulnerability does not require the completion of a TCP three-way handshake.

This vulnerability is documented in Cisco bug ID CSCtf91428 ( registered customers only) and has been assigned Common Vulnerabilities and Exposures (CVE) IDs CVE-2010-2832.

NAT for H.225.0 DoS vulnerability

H.323 is the ITU standard for real-time multimedia communications and conferencing over packet-based (IP) networks. A subset of the H.323 standard is H.225.0, a standard used for call signaling protocols and media stream packetization over IP networks.

NAT for H.225.0 translates packets on TCP port 1720. There is a DoS vulnerability in the NAT translation of H.225.0 call signaling for H.323 packets.

This vulnerability is documented in Cisco bug ID CSCtd86472 ( registered customers only) and has been assigned Common Vulnerabilities and Exposures (CVE) IDs CVE-2010-2833.

Vulnerability Scoring Details

Cisco has provided scores for the vulnerabilities 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 .

CSCtf17624 ( registered customers only) NAT SIP DoS Vulnerability

Calculate the environmental score of CSCtf17624

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

CSCtf91428 ( registered customers only) NAT for H.323 DoS Vulnerability

Calculate the environmental score of CSCtf91428

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

CSCtd86472 ( registered customers only) NAT for H.225.0 DoS Vulnerability

Calculate the environmental score of CSCtd86472

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

Impact

Successful exploitation of any of the vulnerabilities described in this document may cause the affected device to reload. Repeated exploitation will result in an extended denial of service (DoS) condition.

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 following Cisco IOS Software table corresponds to a Cisco IOS Software train. If a particular train is vulnerable, the earliest releases that contain the fix are listed in the First Fixed Release For This Advisory column. The First Fixed Release for All Advisories in the September 2010 Bundle Publication column lists the earliest possible releases that correct all the published vulnerabilities in the Cisco IOS Software Security Advisory bundled publication. Cisco recommends upgrading to the latest available release, where possible.

Major Release

Availability of Repaired Releases

Affected 12.0-Based Releases

First Fixed Release for This Advisory

First Fixed Release for All Advisories in the September 2010 Bundle Publication

There are no affected 12.0 based releases

Affected 12.1-Based Releases

First Fixed Release for This Advisory

First Fixed Release for All Advisories in the September 2010 Bundle Publication

12.1

Vulnerable; first fixed in 12.4

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

Vulnerable; first fixed in 12.4T

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

12.1AA

Not Vulnerable

Not Vulnerable

12.1AX

Not Vulnerable

Not Vulnerable

12.1AY

Not Vulnerable

Not Vulnerable

12.1AZ

Not Vulnerable

Not Vulnerable

12.1CX

Not Vulnerable

Not Vulnerable

12.1DA

Not Vulnerable

Not Vulnerable

12.1DB

Not Vulnerable

Not Vulnerable

12.1DC

Not Vulnerable

Not Vulnerable

12.1E

Not Vulnerable

Not Vulnerable

12.1EA

Not Vulnerable

Not Vulnerable

12.1EB

Not Vulnerable

Not Vulnerable

12.1EC

Not Vulnerable

Not Vulnerable

12.1EO

Not Vulnerable

Not Vulnerable

12.1EU

Not Vulnerable

Not Vulnerable

12.1EV

Not Vulnerable

Not Vulnerable

12.1EW

Not Vulnerable

Not Vulnerable

12.1EX

Not Vulnerable

Not Vulnerable

12.1EY

Not Vulnerable

Not Vulnerable

12.1EZ

Not Vulnerable

Not Vulnerable

12.1GA

Not Vulnerable

Not Vulnerable

12.1GB

Not Vulnerable

Not Vulnerable

12.1T

Not Vulnerable

Vulnerable; first fixed in 12.4T

Releases up to and including 12.1(3a)T8 are not vulnerable.

12.1XA

Not Vulnerable

Not Vulnerable

12.1XB

Not Vulnerable

Not Vulnerable

12.1XC

Not Vulnerable

Not Vulnerable

12.1XD

Not Vulnerable

Not Vulnerable

12.1XE

Not Vulnerable

Not Vulnerable

12.1XF

Not Vulnerable

Not Vulnerable

12.1XG

Not Vulnerable

Not Vulnerable

12.1XH

Not Vulnerable

Not Vulnerable

12.1XI

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.1XJ

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.1XL

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.1XM

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.1XP

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.1XQ

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.1XR

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.1XS

Not Vulnerable

Vulnerable; first fixed in 12.4T

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

12.1XT

Not Vulnerable

Vulnerable; first fixed in 12.4T

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

12.1XU

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.1XV

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.1XW

Not Vulnerable

Not Vulnerable

12.1XX

Not Vulnerable

Not Vulnerable

12.1XY

Not Vulnerable

Vulnerable; first fixed in 12.4T

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

12.1XZ

Not Vulnerable

Not Vulnerable

12.1YA

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.1YB

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.1YC

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.1YD

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.1YE

Not Vulnerable

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

12.1YF

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.1YH

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.1YI

Not Vulnerable

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

12.1YJ

Not Vulnerable

Not Vulnerable

Affected 12.2-Based Releases

First Fixed Release for This Advisory

First Fixed Release for All Advisories in the September 2010 Bundle Publication

12.2

Vulnerable; first fixed in 12.4

Releases up to and including 12.2(16f) are not vulnerable.

Vulnerable; first fixed in 12.4T

12.2B

Not Vulnerable

Vulnerable; first fixed in 12.4T

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

12.2BC

Not Vulnerable

Not Vulnerable

12.2BW

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2BX

Not Vulnerable

Vulnerable; first fixed in 12.2SB

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

12.2BY

Not Vulnerable

Vulnerable; first fixed in 12.4T

Releases up to and including 12.2(2)BY3 are not vulnerable.

12.2BZ

Not Vulnerable

Not Vulnerable

12.2CX

Not Vulnerable

Not Vulnerable

12.2CY

Not Vulnerable

Not Vulnerable

12.2CZ

Not Vulnerable

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

12.2DA

Not Vulnerable

Not Vulnerable

12.2DD

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2DX

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2EW

Not Vulnerable

Not Vulnerable

12.2EWA

Not Vulnerable

Not Vulnerable

12.2EX

Vulnerable; migrate to any release in 12.2SE

Not Vulnerable

12.2EY

Not Vulnerable

Not Vulnerable

12.2EZ

Not Vulnerable

Not Vulnerable

12.2FX

Not Vulnerable

Not Vulnerable

12.2FY

Not Vulnerable

Not Vulnerable

12.2FZ

Not Vulnerable

Not Vulnerable

12.2IRA

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

12.2IRB

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

12.2IRC

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

12.2IRD

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

12.2IRE

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

12.2IXA

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

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

12.2IXB

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

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

12.2IXC

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

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

12.2IXD

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

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

12.2IXE

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

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

12.2IXF

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

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

12.2IXG

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

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

12.2IXH

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

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

12.2JA

Not Vulnerable

Not Vulnerable

12.2JK

Not Vulnerable

Not Vulnerable

12.2MB

Not Vulnerable

Not Vulnerable

12.2MC

Not Vulnerable

Releases up to and including 12.2(15)MC1 are not vulnerable. Releases 12.2(15)MC2b and later are not vulnerable; first fixed in 12.4T

12.2MRA

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

12.2MRB

12.2(33)MRB2

12.2(33)MRB2

12.2S

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

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

12.2SB

Not Vulnerable

12.2(31)SB19; Releases prior to 12.2(33)SB5 are vulnerable, release 12.2(33)SB5 and later are not vulnerable

12.2SBC

Vulnerable; first fixed in 12.2SB

Vulnerable; first fixed in 12.2SB

12.2SCA

Not Vulnerable

Vulnerable; first fixed in 12.2SCB

12.2SCB

12.2(33)SCB10

12.2(33)SCB9

12.2(33)SCB9

12.2SCC

12.2(33)SCC5

12.2(33)SCC5

12.2SCD

12.2(33)SCD3

12.2(33)SCD4

12.2(33)SCD3

12.2SE

Not Vulnerable

Not Vulnerable

12.2SEA

Not Vulnerable

Not Vulnerable

12.2SEB

Not Vulnerable

Not Vulnerable

12.2SEC

Not Vulnerable

Not Vulnerable

12.2SED

Not Vulnerable

Not Vulnerable

12.2SEE

Not Vulnerable

Not Vulnerable

12.2SEF

Not Vulnerable

Not Vulnerable

12.2SEG

Not Vulnerable

Not Vulnerable

12.2SG

Releases prior to 12.2(40)SG are vulnerable, release 12.2(40)SG and later are not vulnerable; migrate to any release in 12.2SGA

Releases prior to 12.2(40)SG are vulnerable, release 12.2(40)SG and later are not vulnerable; migrate to any release in 12.2SGA

12.2SGA

Not Vulnerable

Not Vulnerable

12.2SL

Not Vulnerable

Not Vulnerable

12.2SM

Not Vulnerable

Not Vulnerable

12.2SO

Not Vulnerable

Not Vulnerable

12.2SQ

Not Vulnerable

Not Vulnerable

12.2SRA

Not Vulnerable

Releases prior to 12.2(33)SRA6 are vulnerable, release 12.2(33)SRA6 and later are not vulnerable

12.2SRB

Not Vulnerable

Releases prior to 12.2(33)SRB1 are vulnerable, release 12.2(33)SRB1 and later are not vulnerable

12.2SRC

Not Vulnerable

Not vulnerable

12.2SRD

Not Vulnerable

Not vulnerable

12.2SRE

12.2(33)SRE1

12.2(33)SRE1

12.2STE

Not Vulnerable

Not Vulnerable

12.2SU

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2SV

Releases prior to 12.2(29b)SV1 are vulnerable, release 12.2(29b)SV1 and later are not vulnerable; migrate to any release in 12.2SVD

Releases prior to 12.2(29b)SV1 are vulnerable, release 12.2(29b)SV1 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 up to and including 12.2(25)SW3 are not vulnerable.

Releases 12.2(25)SW12 and later are not vulnerable; first fixed in 12.4T

Releases up to and including 12.2(21)SW1 are not vulnerable. Releases 12.2(25)SW12 and later are not vulnerable; first fixed in 12.4T

12.2SX

Releases up to and including 12.2(14)SX2 are not vulnerable.

Releases up to and including 12.2(14)SX2 are not vulnerable.

12.2SXA

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

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

12.2SXB

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

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

12.2SXD

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

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

12.2SXE

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

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

12.2SXF

Releases prior to 12.2(18)SXF11 are vulnerable, releases 12.2(18)SXF11 and later are not vulnerable

Releases prior to 12.2(18)SXF11 are vulnerable, releases 12.2(18)SXF11 and later are not vulnerable

12.2SXH

Not Vulnerable

Not Vulnerable

12.2SXI

Not Vulnerable

Not Vulnerable

12.2SY

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

Not Vulnerable

12.2SZ

Not Vulnerable

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

12.2T

Not Vulnerable

Vulnerable; first fixed in 12.4T

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 12.4T

12.2XB

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2XC

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2XD

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2XE

Not Vulnerable

Not Vulnerable

12.2XF

Not Vulnerable

Not Vulnerable

12.2XG

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2XH

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2XI

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2XJ

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2XK

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2XL

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2XM

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2XN

Vulnerable; first fixed in 12.2SB

Vulnerable; first fixed in 12.2SB

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

Not Vulnerable

12.2XQ

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2XR

Not Vulnerable

Not Vulnerable

12.2XS

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2XT

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2XU

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2XV

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2XW

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2YA

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2YB

Not Vulnerable

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

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

12.2YF

Not Vulnerable

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

12.2YG

Not Vulnerable

Not Vulnerable

12.2YH

Not Vulnerable

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

12.2YJ

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

12.2YL

Not Vulnerable

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

12.2YM

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2YN

Not Vulnerable

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

12.2YO

Not Vulnerable

Not Vulnerable

12.2YP

Not Vulnerable

Not Vulnerable

12.2YQ

Not Vulnerable

Not Vulnerable

12.2YR

Not Vulnerable

Not Vulnerable

12.2YS

Not Vulnerable

Not Vulnerable

12.2YT

Not Vulnerable

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

12.2YU

Not Vulnerable

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

12.2YV

Not Vulnerable

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

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

Not Vulnerable

12.2ZB

Not Vulnerable

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

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 12.4T

12.2ZF

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2ZG

Not Vulnerable

Not Vulnerable

12.2ZH

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.2ZJ

Not Vulnerable

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

12.2ZL

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

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

12.2ZP

Not Vulnerable

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

12.2ZU

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

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

12.2ZX

Not Vulnerable

Not Vulnerable

12.2ZY

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

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

12.2ZYA

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

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

Affected 12.3-Based Releases

First Fixed Release for This Advisory

First Fixed Release for All Advisories in the September 2010 Bundle Publication

12.3

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.3B

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.3BC

Not Vulnerable

Not Vulnerable

12.3BW

Not Vulnerable

Not Vulnerable

12.3EU

Not Vulnerable

Not Vulnerable

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 12.4T

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 12.4T

12.3JL

Not Vulnerable

Not Vulnerable

12.3JX

Not Vulnerable

Not Vulnerable

12.3T

Vulnerable; first fixed in 12.4

Vulnerable; first fixed in 12.4T

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

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3XA

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3XB

Not Vulnerable

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

12.3XC

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3XD

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3XE

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

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 12.4T

Vulnerable; first fixed in 12.4T

12.3XI

Releases prior to 12.3(7)XI11 are vulnerable, release 12.3(7)XI11 and later are not vulnerable; first fixed in 12.2SB

Releases prior to 12.3(7)XI11 are vulnerable, releases 12.3(7)XI11 and later are not vulnerable; first fixed in 12.2SB

12.3XJ

Vulnerable; first fixed in 12.3YX

Vulnerable; first fixed in 12.4XR

12.3XK

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3XL

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3XQ

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3XR

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3XS

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3XU

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3XW

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3XX

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3XY

Not Vulnerable

Vulnerable; first fixed in 12.4T

12.3XZ

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3YA

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3YD

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3YF

Vulnerable; first fixed in 12.3YX

Vulnerable; first fixed in 12.4XR

12.3YG

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3YH

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3YI

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3YJ

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3YK

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3YM

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3YQ

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3YS

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3YT

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3YU

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.3YX

12.3(14)YX17

Vulnerable; first fixed in 12.4XR

12.3YZ

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

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

12.3ZA

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

Affected 12.4-Based Releases

First Fixed Release for This Advisory

First Fixed Release for All Advisories in the September 2010 Bundle Publication

12.4

12.4(25d)

12.4(25d)

12.4GC

12.4(24)GC2

12.4(24)GC2

12.4JA

Not Vulnerable

Not Vulnerable

12.4JDA

Not Vulnerable

Not Vulnerable

12.4JDC

Not Vulnerable

Not Vulnerable

12.4JDD

Not Vulnerable

Not Vulnerable

12.4JHA

Not Vulnerable

Not Vulnerable

12.4JHB

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

Not Vulnerable

12.4JY

Not Vulnerable

Not Vulnerable

12.4MD

12.4(22)MD2

12.4(24)MD2

12.4MDA

12.4(22)MDA4

12.4(22)MDA4

12.4MR

Vulnerable; first fixed in 12.4MRA

Vulnerable; first fixed in 12.4MRA

12.4MRA

12.4(20)MRA1

12.4(20)MRA1

12.4SW

Releases prior to 12.4(15)SW6 are vulnerable, release 12.4(15)SW6 and later are not vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.4T

12.4(15)T14

12.4(20)T6

12.4(24)T4

12.4(15)T14

12.4(20)T6

12.4(24)T4

12.4XA

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.4XB

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.4XC

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.4XD

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.4XE

Releases prior to 12.4(6)XE5 are vulnerable, release 12.4(6)XE5 and later are not vulnerable; first fixed in 12.4T

Releases prior to 12.4(6)XE5 are vulnerable, release 12.4(6)XE5 and later are not vulnerable; first fixed in 12.4T

12.4XF

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.4XG

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.4XJ

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.4XK

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

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 12.4T

Vulnerable; first fixed in 12.4T

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

12.4(15)XQ6; Available on 22-SEP-10

12.4(15)XQ6; Available on 22-SEP-10

12.4XR

12.4(15)XR9

12.4(22)XR7

12.4(15)XR9

12.4(22)XR7

12.4XT

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

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 12.4T

Vulnerable; first fixed in 12.4T

12.4XY

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.4XZ

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

12.4YA

Vulnerable; first fixed in 12.4T

Vulnerable; first fixed in 12.4T

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

Vulnerable; first fixed in 12.4T

12.4(24)YE1

12.4YG

12.4(24)YG3

12.4(24)YG3

Affected 15.0-Based Releases

First Fixed Release for This Advisory

First Fixed Release for All Advisories in the September 2010 Bundle Publication

15.0M

15.0(1)M3

15.0(1)M3

15.0S

Cisco 7600 and 10000 Series routers: 15.0(1)S1

Cisco ASR 1000 Series routers: Please see Cisco IOS-XE Software Availability

Cisco 7600 and 10000 Series routers: 15.0(1)S1

Cisco ASR 1000 Series routers: Please see Cisco IOS-XE Software Availability

15.0XA

Vulnerable; first fixed in 15.1T

Vulnerable; first fixed in 15.1T

15.0XO

Not Vulnerable

Not Vulnerable

Affected 15.1-Based Releases

First Fixed Release for This Advisory

First Fixed Release for All Advisories in the September 2010 Bundle Publication

15.1T

15.1(1)T1

15.1(2)T1

15.1XB

15.1(1)XB2

Vulnerable; first fixed in 15.1T

Cisco IOS XE Software

Cisco IOS XE Release

First Fixed Release for This Advisory

First Fixed Release for All Advisories in the September 2010 Bundle Publication

2.1.x

Not Vulnerable

Not Vulnerable

2.2.x

Not Vulnerable

Not Vulnerable

2.3.x

Not Vulnerable

Not Vulnerable

2.4.x

Not Vulnerable

Not Vulnerable

2.5.x

Not Vulnerable

Vulnerable; migrate to 2.6.2 or later

2.6.x

Not Vulnerable

2.6.2

3.1.xS

Not Vulnerable

Not Vulnerable

For mapping of Cisco IOS XE Software releases to Cisco IOS Software releases, refer to the Cisco IOS XE 2 and Cisco IOS XE 3S Release Notes.

Cisco IOS XR Software Table

Cisco IOS XR Software is not affected by the vulnerabilities disclosed in the September 22, 2010, Cisco IOS Software Security Advisory bundle publication.

Workarounds

The mitigations for the NAT vulnerabilities disable the respective Application Layer Gateway NAT processing. That is, packets will continue to be translated at the network and transport layers, but the embedded IP addresses will not be translated.

NAT for Session Initiation Protocol DoS Vulnerability

Mitigation for this vulnerability consists of disabling NAT for SIP over the UDP transport by using the no ip nat service sip udp port 5060 global configuration command.

NAT for H.323 DoS Vulnerability

Mitigation for this vulnerability consists of disabling NAT for H.323 and H.225.0 using the no ip nat service h225 global configuration command.

NAT for H.225.0 DoS vulnerability

Mitigation for this vulnerability consists of disabling NAT for H.323 and H.225.0 using the no ip nat service h225 global configuration command.

Obtaining Fixed Software

Cisco has released free software updates that address these vulnerabilities. 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 with contracts should obtain upgraded software through their regular update channels. For most customers, upgrades should be obtained through the Software Center on Cisco.com at http://www.cisco.com.

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 vulnerabilities described in this advisory.

The NAT for SIP DoS vulnerability was found during internal testing.

The NAT for H.323 DoS and the NAT for H.225.0 DoS vulnerabilities were found during the resolution of customer service requests.

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-20100922-nat

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 1.0

2010-Sep-22

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.