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Python: Integer overflows


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200907-16 / python
Release Date July 19, 2009
Latest Revision July 19, 2009: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
dev-lang/python < 2.5.4-r2 >= 2.5.4-r2, revision >= 2.4.6 All supported architectures

Related bugreports: #246991


Multiple integer overflows in Python have an unspecified impact.

2.  Impact Information


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


Chris Evans reported multiple integer overflows in the expandtabs method, as implemented by (1) the string_expandtabs function in Objects/stringobject.c and (2) the unicode_expandtabs function in Objects/unicodeobject.c.


A remote attacker could exploit these vulnerabilities in Python applications or daemons that pass user-controlled input to vulnerable functions. The security impact is currently unknown but may include the execution of arbitrary code or a Denial of Service.

3.  Resolution Information


There is no known workaround at this time.


All Python 2.5 users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-lang/python-2.5.4-r2"

All Python 2.4 users should upgrade to the latest version:

Code Listing 3.2: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-lang/python-2.4.6"

4.  References


Page updated July 19, 2009

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