Resource management error in Python - CVE-2011-1521
Published: May 25, 2011 / Updated: August 11, 2020
Vulnerability identifier: #VU45029
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2011-1521
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Python.org
Affected software:
Python
Python
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to #BASIC_IMPACT#.
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.
How to mitigate CVE-2011-1521
Install update from vendor's website.
Sources
- http://bugs.python.org/issue11662
- http://hg.python.org/cpython/file/96a6c128822b/Misc/NEWS
- http://hg.python.org/cpython/file/b2934d98dac1/Misc/NEWS
- http://hg.python.org/cpython/rev/96a6c128822b/
- http://hg.python.org/cpython/rev/b2934d98dac1/
- http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
- http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html
- http://openwall.com/lists/oss-security/2011/03/24/5
- http://openwall.com/lists/oss-security/2011/03/28/2
- http://openwall.com/lists/oss-security/2011/09/11/1
- http://openwall.com/lists/oss-security/2011/09/13/2
- http://openwall.com/lists/oss-security/2011/09/15/5
- http://secunia.com/advisories/50858
- http://secunia.com/advisories/51024
- http://secunia.com/advisories/51040
- http://securitytracker.com/id?1025488
- http://support.apple.com/kb/HT5002
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:096
- http://www.ubuntu.com/usn/USN-1592-1
- http://www.ubuntu.com/usn/USN-1596-1
- http://www.ubuntu.com/usn/USN-1613-1
- http://www.ubuntu.com/usn/USN-1613-2
- https://bugzilla.redhat.com/show_bug.cgi?id=690560
- https://bugzilla.redhat.com/show_bug.cgi?id=737366
- https://www.djangoproject.com/weblog/2011/sep/09/
- https://www.djangoproject.com/weblog/2011/sep/10/127/