CVE-2011-1521
MEDIUM · CVSS 6.4EPSS 3.6%EU EUVD
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.
Key facts
- CVSS score
- 6.4 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:N/A:P- Weakness (CWE)
- CWE-399
- EPSS score
- 3.6% (89th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2011-1522)
- Published
- May 24, 2011
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2011-1522 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
References
- http://bugs.python.org/issue11662(Patch)
- 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/(Patch)
- http://hg.python.org/cpython/rev/b2934d98dac1/(Patch)
- 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(Patch)
- 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/
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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