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

[news 28]

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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 ( -at -) 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