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Python: Heap overflow in the included PCRE library


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200509-08 / Python
Release Date September 12, 2005
Latest Revision September 12, 2005: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
dev-lang/python < 2.3.5-r2 >= 2.3.5-r2 All supported architectures

Related bugreports: #104009


The "re" Python module is vulnerable to a heap overflow, possibly leading to the execution of arbitrary code.

2.  Impact Information


Python is an interpreted, interactive, object-oriented, cross-platform programming language. The "re" Python module provides regular expression functions.


The "re" Python module makes use of a private copy of libpcre which is subject to an integer overflow leading to a heap overflow (see GLSA 200508-17).


An attacker could target a Python-based web application (or SUID application) that would use untrusted data as regular expressions, potentially resulting in the execution of arbitrary code (or privilege escalation).

3.  Resolution Information


Python users that don't run any Python web application or SUID application (or that run one that wouldn't use untrusted inputs as regular expressions) are not affected by this issue.


All Python users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-lang/python-2.3.5-r2"

4.  References


Page updated September 12, 2005

Summary: This is a Gentoo Linux Security Advisory

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