Apple Mac OS X could allow an attacker to bypass IPSec ACLs

macos-ipsec-acl-bypass (12027) The risk level is classified as MediumMedium Risk

Description:

Apple Mac OS X could allow a remote attacker to bypass Access Control Lists (ACL), caused by a vulnerability in the IPSec implementation. The IPSec implementation fails to properly handle certain types of IP traffic. A remote attacker can exploit this vulnerability by bypassing the security policy on the system to perform attacks on the network.


Consequences:

Bypass Security

Remedy:

Upgrade to the latest version of Mac OS X (10.2.6 or later), as listed in the Apple Security Update Article ID 61798. See References.

References:

  • AppleCare Knowledge Base Document 61798: Apple Security Updates.
  • BID-7628: Apple MacOS X IPSec Policy By Port Bypass Vulnerability
  • CVE-2003-0242: IPSec in Mac OS X before 10.2.6 does not properly handle certain incoming security policies that match by port, which could allow traffic that is not explicitly allowed by the policies.
  • SA8798: Apple Mac OS X IPSec ACL Bypass
  • SECTRACK ID: 1006796: Mac OS X IPSec Policy Flaw May Remote Users Bypass Access Controls
  • US-CERT VU#869548: Apple Mac OS X IPSec mechanism fails to handle certain incoming security policies that match by port

Platforms Affected:

  • Apple Mac OS X 10.0
  • Apple Mac OS X 10.0.4
  • Apple Mac OS X 10.1
  • Apple Mac OS X 10.1.1
  • Apple Mac OS X 10.1.2
  • Apple Mac OS X 10.1.3
  • Apple Mac OS X 10.1.4
  • Apple Mac OS X 10.1.5
  • Apple Mac OS X 10.2
  • Apple Mac OS X 10.2.1
  • Apple Mac OS X 10.2.2
  • Apple Mac OS X 10.2.3
  • Apple Mac OS X 10.2.4
  • Apple Mac OS X 10.2.5
  • Apple Mac OS X Server 10.0.1
  • Apple Mac OS X Server 10.0.2
  • Apple Mac OS X Server 10.0.3

Reported:

May 19, 2003

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