USN-581-1: PCRE vulnerability

21 February 2008

pcre3 vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 7.10
  • Ubuntu 7.04
  • Ubuntu 6.10
  • Ubuntu 6.06 LTS

Software Description

  • pcre3


It was discovered that PCRE did not correctly handle very long strings containing UTF8 sequences. In certain situations, an attacker could exploit applications linked against PCRE by tricking a user or automated system in processing a malicious regular expression leading to a denial of service or possibly arbitrary code execution.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 7.10
libpcre3 - 7.4-0ubuntu0.7.10.2
Ubuntu 7.04
libpcre3 - 7.4-0ubuntu0.7.04.2
Ubuntu 6.10
libpcre3 - 7.4-0ubuntu0.6.10.2
Ubuntu 6.06 LTS
libpcre3 - 7.4-0ubuntu0.6.06.2

To update your system, please follow these instructions:

After a standard system upgrade you need to reboot your computer to effect the necessary changes.