Multiple vendors 3rd party cryptographic library ASN.1 denial of service

multiple-crypto-asn1-dos (34430)

Low Risk

Description:

Multiple vendors including Cisco devices running IOS and Novell are vulnerable to a denial of service attack caused by improper parsing of abstract Syntax Notation One (ASN.1) objects by a 3rd party cryptographic library. A remote attacker could exploit this vulnerability to cause the device to stop responding.

Platforms Affected:

• Cisco, IOS 12.21XA
• Cisco, IOS 12.21XB
• Cisco, IOS 12.2B
• Cisco, IOS 12.2BC
• Cisco, IOS 12.2BZ
• Cisco, IOS 12.2CX
• Cisco, IOS 12.2CZ
• Cisco, IOS 12.2EW
• Cisco, IOS 12.2EWA
• Cisco, IOS 12.2EX
• Cisco, IOS 12.2EY
• Cisco, IOS 12.2EZ
• Cisco, IOS 12.2FX
• Cisco, IOS 12.2FZ
• Cisco, IOS 12.2IXC
• Cisco, IOS 12.2JA
• Cisco, IOS 12.2JK
• Cisco, IOS 12.2SB
• Cisco, IOS 12.2SE
• Cisco, IOS 12.2SEA
• Cisco, IOS 12.2SEB
• Cisco, IOS 12.2SEC
• Cisco, IOS 12.2SED
• Cisco, IOS 12.2SEE
• Cisco, IOS 12.2SEF
• Cisco, IOS 12.2SEG
• Cisco, IOS 12.2SG
• Cisco, IOS 12.2SGA
• Cisco, IOS 12.2SRA
• Cisco, IOS 12.2SRB
• Cisco, IOS 12.2SXD
• Cisco, IOS 12.2SXE
• Cisco, IOS 12.2SXF
• Cisco, IOS 12.2T
• Cisco, IOS 12.2XR
• Cisco, IOS 12.2YU
• Cisco, IOS 12.2YV
• Cisco, IOS 12.2ZD
• Cisco, IOS 12.2ZE
• Cisco, IOS 12.2ZF
• Cisco, IOS 12.2ZG
• Cisco, IOS 12.2ZH
• Cisco, IOS 12.2ZJ
• Cisco, IOS 12.2ZL
• Cisco, IOS 12.2ZU
• Cisco, IOS 12.2ZW
• Cisco, IOS 12.3
• Cisco, IOS 12.3B
• Cisco, IOS 12.3BC
• Cisco, IOS 12.3JA
• Cisco, IOS 12.3JEA
• Cisco, IOS 12.3JK
• Cisco, IOS 12.3JL
• Cisco, IOS 12.3JX
• Cisco, IOS 12.3T
• Cisco, IOS 12.3TPC
• Cisco, IOS 12.3XA
• Cisco, IOS 12.3XB
• Cisco, IOS 12.3XC
• Cisco, IOS 12.3XD
• Cisco, IOS 12.3XE
• Cisco, IOS 12.3XF
• Cisco, IOS 12.3XG
• Cisco, IOS 12.3XH
• Cisco, IOS 12.3XI
• Cisco, IOS 12.3XJ
• Cisco, IOS 12.3XK
• Cisco, IOS 12.3XQ
• Cisco, IOS 12.3XR
• Cisco, IOS 12.3XS
• Cisco, IOS 12.3XU
• Cisco, IOS 12.3XW
• Cisco, IOS 12.3XX
• Cisco, IOS 12.3YA
• Cisco, IOS 12.3YD
• Cisco, IOS 12.3YF
• Cisco, IOS 12.3YG
• Cisco, IOS 12.3YH
• Cisco, IOS 12.3YI
• Cisco, IOS 12.3YK
• Cisco, IOS 12.3YQ
• Cisco, IOS 12.3YS
• Cisco, IOS 12.3YT
• Cisco, IOS 12.3YU
• Cisco, IOS 12.3YX
• Cisco, IOS 12.3YZ
• Cisco, IOS 12.4
• Cisco, IOS 12.4SW
• Cisco, IOS 12.4T
• Cisco, IOS 12.4XA
• Cisco, IOS 12.4XB
• Cisco, IOS 12.4XC
• Cisco, IOS 12.4XD
• Cisco, IOS 12.4XE
• Cisco, IOS 12.4XJ
• Cisco, IOS 12.4XP
• Cisco, IOS XR 3.2.3
• Cisco, IOS XR 3.2.4
• Cisco, IOS XR 3.2.6
• Cisco, IOS XR 3.3
• Cisco, IOS XR 3.3.1
• Cisco, IOS XR 3.3.2
• Cisco, IOS XR 3.3.3
• Cisco, IOS XR 3.4
• Cisco, IOS XR 3.4.1
• Cisco, PIX ASA IDS 7.0
• Cisco, PIX ASA IDS 7.1
• Cisco, PIX ASA IDS 7.2
• Cisco, Unified CallManager 4.0
• Cisco, Unified CallManager 4.1
• Cisco, Unified CallManager 4.2
• Cisco, Unified CallManager 4.3
• Cisco, Unified CallManager 5.0
• Cisco, Unified CallManager 5.1
• RSA, BSAFE CERT-C 2.7
• RSA, BSAFE CRYPTO-C 6.3

Remedy:

For Cisco:
Refer to cisco-sa-20070522-crypto for patch, upgrade, or suggested workaround information. See References.

For Novell:
Refer to Novell Security Alert 3590033 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

Consequences:

Denial of Service

References:

• cisco-sa-20070522-crypto, Cisco Security Advisory: Vulnerability In Crypto Library at http://www.cisco.com/warp/public/707/cisco-sa-20070522-crypto.shtml .
• Novell Security Alert 3590033, Security Vulnerability: RSA BSAFE Libraries denial of service at https://secure-support.novell.com/KanisaPlatform/Publishing/97/3590033_f.SAL_Public.html.
• BID-24104: RSA BSAFE Library Remote ASN.1 Denial of Service Vulnerability
• CVE-2006-3894: The RSA Crypto-C before 6.3.1 and Cert-C before 2.8 libraries, as used by RSA BSAFE, multiple Cisco products, and other products, allows remote attackers to cause a denial of service via malformed ASN.1 objects.
• FrSIRT/ADV-2007-1908: RSA BSAFE Library ASN.1 Objects Processing Remote Denial of Service Vulnerability
• FrSIRT/ADV-2007-1909: Cisco Products Crypto Library ASN.1 Objects Processing Denial of Service Vulnerability
• FrSIRT/ADV-2007-1945: Novell International Crypotographic Infrastructure Security Bypass and DoS Issues
• SA25343: RSA BSAFE Unspecified Denial of Service Vulnerability
• SA25364: Cisco Products Crypto Library Denial of Service
• SA25399: Novell International Cryptographic Infrastructure Two Vulnerabilities
• SECTRACK ID: 1018095: RSA BSAFE ASN.1 Parsing Bug Lets Remote Users Deny Service
• US-CERT VU#754281: RSA BSAFE libraries denial of service vulnerability

Reported:

May 22, 2007

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