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[gentoo-announce] [ GLSA 200807-01 ] Python: Multiple integer overflows

Posted on 01 July 2008
Gentoo-announce

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Gentoo Linux Security Advisory GLSA 200807-01
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http://security.gentoo.org/
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Severity: Normal
Title: Python: Multiple integer overflows
Date: July 01, 2008
Bugs: #216673, #217221
ID: 200807-01

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Synopsis
========
Multiple integer overflows may allow for Denial of Service.

Background
==========
Python is an interpreted, interactive, object-oriented programming
language.

Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-lang/python < 2.4.4-r13 *>= 2.3.6-r6
>= 2.4.4-r13

Description
===========
Multiple vulnerabilities were discovered in Python:

* David Remahl reported multiple integer overflows in the file
imageop.c, leading to a heap-based buffer overflow (CVE-2008-1679).
This issue is due to an incomplete fix for CVE-2007-4965.

* Justin Ferguson discovered that an integer signedness error in the
zlib extension module might trigger insufficient memory allocation
and a buffer overflow via a negative signed integer (CVE-2008-1721).

* Justin Ferguson discovered that insufficient input validation in
the PyString_FromStringAndSize() function might lead to a buffer
overflow (CVE-2008-1887).

Impact
======
A remote attacker could exploit these vulnerabilities to cause a Denial
of Service or possibly the remote execution of arbitrary code with the
privileges of the user running Python.

Workaround
==========
There is no known workaround at this time.

Resolution
==========
The imageop module is no longer built in the unaffected versions.

All Python 2.3 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-lang/python-2.3.6-r6"

All Python 2.4 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-lang/python-2.4.4-r13"

References
==========
[ 1 ] CVE-2008-1679
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1679
[ 2 ] CVE-2008-1721
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1721
[ 3 ] CVE-2008-1887
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1887

Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200807-01.xml

Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======
Copyright 2008 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5


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