Python: Multiple integer overflows — GLSA 200807-01

Multiple integer overflows may allow for Denial of Service.

Affected Packages

dev-lang/python on all architectures
Affected versions < 2.4.4-r13
Unaffected versions revision >= 2.3.6-r6, >= 2.4.4-r13

Background

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

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

Release Date
July 01, 2008

Latest Revision
July 01, 2008: 01

Severity
normal

Exploitable
remote

Bugzilla entries