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