--- title: "CVE-2005-2491\n | Ubuntu" description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/CVE-2005-2491?format=md keywords: index, follow --- # CVE-2005-2491 Publication date 23 August 2005 Last updated 17 July 2025 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## Description Integer overflow in pcre\_compile.c in Perl Compatible Regular Expressions (PCRE) before 6.2, as used in multiple products such as Python, Ethereal, and PHP, allows attackers to execute arbitrary code via quantifier values in regular expressions, which leads to a heap-based buffer overflow. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | apache2 | 7.04 feisty | Not affected | | 6.10 edgy | Not affected | | 6.06 LTS dapper | Not affected | | gnumeric | 7.04 feisty | Not affected | | 6.10 edgy | Not affected | | 6.06 LTS dapper | Not affected | | pcre3 | 7.04 feisty | Fixed 6.4-1.1ubuntu4 | | 6.10 edgy | Fixed 6.4-1.1ubuntu4 | | 6.06 LTS dapper | Fixed 6.4-1.1ubuntu4 | | python2.2 | 7.04 feisty | Not in release | | 6.10 edgy | Not in release | | 6.06 LTS dapper | Fixed 2.2.3dfsg-4 | | python2.3 | 7.04 feisty | Not in release | | 6.10 edgy | Not in release | | 6.06 LTS dapper | Fixed 2.3.5-9ubuntu1.2 | | python2.4 | 7.04 feisty | Not affected | | 6.10 edgy | Not affected | | 6.06 LTS dapper | Not affected | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2491) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2005-2491) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2005-2491) * [Debian](https://security-tracker.debian.org/tracker/CVE-2005-2491) ### Related Ubuntu Security Notices (USN) + [USN-173-2](https://usn.ubuntu.com/USN-173-2) + PCRE vulnerability + 25 August 2005 + [USN-173-4](https://usn.ubuntu.com/USN-173-4) + PCRE vulnerabilities + 31 August 2005 + [USN-173-1](https://usn.ubuntu.com/USN-173-1) + PCRE vulnerability + 24 August 2005 ### Other references *