IBM AIX TCP stack denial of service

aix-tcpstack-dos (72562) The risk level is classified as HighHigh Risk

Description:

AIX could allow a remote attacker to cause a denial of service, caused by an error when the TCP large send offload option is enabled on a network interface. By sending a specially-crafted sequence of packets, an attacker could exploit this vulnerability to cause a kernel panic.

*CVSS:

Base Score: 7.1
  Access Vector: Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Complete
 
Temporal Score: 5.3
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Refer to IBM Security Advisory: Vulnerability in AIX RPC for patch, upgrade or suggested workaround information. See References.

References:

  • IBM SECURITY ADVISORY: Vulnerability in AIX TCP stack.
  • BID-51864: IBM AIX TCP Stack Denial of Service Vulnerability
  • CVE-2012-0194: The TCP implementation in IBM AIX 5.3, 6.1, and 7.1, when the Large Send Offload option is enabled, allows remote attackers to cause a denial of service (assertion failure and panic) via an unspecified series of packets.
  • OSVDB ID: 78887: IBM AIX Packet Sequence Parsing Remote DoS
  • OSVDB ID: 79631: IBM AIX ICMP Packet Parsing Remote DoS
  • SA47865: IBM AIX "TCP large send offload" Denial of Service Vulnerability

Platforms Affected:

  • IBM AIX 5.3
  • IBM AIX 6.1
  • IBM AIX 7.1

Reported:

Feb 03, 2012

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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