Cisco Pix and ASA TTL denial of service

pix-asa-ttl-dos (39862) The risk level is classified as MediumMedium Risk

Description:

Cisco PIX and ASA are vulnerable to a denial of service, caused by an error when the Time-to-Live (TTL) decrement feature is enabled. By sending a specially-crafted IP packet, a remote attacker could exploit this vulnerability to reload the device.

*CVSS:

Base Score: 7.8
  Access Vector: Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Complete
 
Temporal Score: 5.8
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Refer to cisco-sa-20080123-asa for patch, upgrade, or suggested workaround information. See References.

References:

  • cisco-sa-20080123-asa: Cisco Security Advisory: Cisco PIX and ASA Time-to-Live Vulnerability.
  • BID-27418: Cisco PIX and ASA Appliance 'TTL Decrement' Denial of Service Vulnerability
  • CVE-2008-0028: Unspecified vulnerability in Cisco PIX 500 Series Security Appliance and 5500 Series Adaptive Security Appliance (ASA) before 7.2(3)6 and 8.0(3), when the Time-to-Live (TTL) decrement feature is enabled, allows remote attackers to cause a denial of service (device reload) via a crafted IP packet.
  • OSVDB ID: 40640: Cisco PIX / ASA Crafted IP Packet Time-To-Live DoS
  • SA28625: Cisco PIX and ASA Time-To-Live Denial of Service Vulnerability
  • SECTRACK ID: 1019262: Cisco ASA TTL Decrement Feature Lets Remote Users Deny Service
  • SECTRACK ID: 1019263: Cisco PIX Firewall TTL Decrement Feature Lets Remote Users Deny Service

Platforms Affected:

  • Cisco 5500 Series Adaptive Security Appliance 7.2-2
  • Cisco 5500 Series Adaptive Security Appliance 8.0-2
  • Cisco PIX 500 7.2.2
  • Cisco PIX 500 8.0.2

Reported:

Jan 23, 2008

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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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