Cisco IOS SSH multiple denial of service

cisco-ios-ssh-multiple-dos (42563) The risk level is classified as LowLow Risk

Description:

Cisco IOS is vulnerable to a denial of service, caused by multiple unspecified errors in the server side implementation of SSH. A remote attacker could exploit this vulnerability using unknown attack vectors to utilize all memory resources or reload the device.

Platforms Affected:

  • Cisco, IOS 12.4
  • Cisco, IOS 12.4(13D)JA
  • Cisco, IOS 12.4(13D)JA1
  • Cisco, IOS 12.4MR
  • Cisco, IOS 12.4SW
  • Cisco, IOS 12.4T
  • Cisco, IOS 12.4XE
  • Cisco, IOS 12.4XF
  • Cisco, IOS 12.4XJ
  • Cisco, IOS 12.4XK
  • Cisco, IOS 12.4XV
  • Cisco, IOS 12.4XW

Remedy:

Refer to cisco-sa-20080521-ssh for patch, upgrade or suggested workaround information. See References.

Consequences:

Denial of Service

References:

  • cisco-sa-20080521-ssh, Cisco IOS Secure Shell Denial of Service Vulnerabilities at http://www.cisco.com/warp/public/707/cisco-sa-20080521-ssh.shtml.
  • BID-29314: Cisco IOS SSH Multiple Denial of Service Vulnerabilities
  • CVE-2008-1159: Multiple unspecified vulnerabilities in the SSH server in Cisco IOS 12.4 allow remote attackers to cause a denial of service (device restart) via unknown vectors, aka Bug ID (1) CSCsk42419, (2) CSCsk60020, and (3) CSCsh51293.
  • FrSIRT/ADV-2008-1605: Cisco IOS Secure Shell Remote Denial of Service Vulnerabilities
  • SA30322: Cisco IOS SSH Server Denial of Service
  • SECTRACK ID: 1020073: Cisco IOS SSH Service Bug Lets Remote Users Deny Service

Reported:

May 21, 2008

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