The urllib and urllib2 modules in Python 2.x before 2.7.2...

Vulnerability Description

The urllib and urllib2 modules in Python 2.x before 2.7.2 and 3.x before 3.2.1 process Location headers that specify redirection to file: URLs, which makes it easier for remote attackers to obtain sensitive information or cause a denial of service (resource consumption) via a crafted URL, as demonstrated by the file:///etc/passwd and file:///dev/zero URLs.

References

• http://openwall.com/lists/oss-security/2011/09/15/5
• http://www.mandriva.com/security/advisories?name=MDVSA-2011:096
• http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html
• http://hg.python.org/cpython/rev/b2934d98dac1/
• http://www.ubuntu.com/usn/USN-1592-1
• http://hg.python.org/cpython/rev/96a6c128822b/
• http://secunia.com/advisories/51040
• http://secunia.com/advisories/50858
• http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
• http://bugs.python.org/issue11662
• http://openwall.com/lists/oss-security/2011/03/24/5
• http://openwall.com/lists/oss-security/2011/03/28/2
• http://securitytracker.com/id?1025488
• http://hg.python.org/cpython/file/96a6c128822b/Misc/NEWS
• https://bugzilla.redhat.com/show_bug.cgi?id=690560
• https://bugzilla.redhat.com/show_bug.cgi?id=737366
• http://www.ubuntu.com/usn/USN-1596-1
• http://hg.python.org/cpython/file/b2934d98dac1/Misc/NEWS
• http://openwall.com/lists/oss-security/2011/09/11/1
• http://www.ubuntu.com/usn/USN-1613-2
• http://support.apple.com/kb/HT5002
• https://www.djangoproject.com/weblog/2011/sep/10/127/
• http://secunia.com/advisories/51024
• http://www.ubuntu.com/usn/USN-1613-1
• http://openwall.com/lists/oss-security/2011/09/13/2
• https://www.djangoproject.com/weblog/2011/sep/09/