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Last updated: 4/19/2014

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National Cyber Awareness System

Vulnerability Summary for CVE-2011-1521

Original release date: 05/24/2011
Last revised: 02/20/2014
Source: US-CERT/NIST

Overview

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.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 6.4 (HIGH) (AV:N/AC:L/AU:N/C:P/I:N/A:P) (legend)
Impact Subscore: 4.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows disruption of service

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External Source: SECTRACK
Name: 1025488
External Source: SUSE
Name: SUSE-SR:2011:009
External Source: MLIST
Name: [oss-security] 20110328 Re: CVE Request -- Python (urllib, urllib2): Improper management of ftp:// and file:// URL schemes
External Source: SECUNIA
Name: 51040
External Source: SECUNIA
Name: 51024
External Source: CONFIRM
Name: http://hg.python.org/cpython/rev/96a6c128822b/
Type: Patch Information
External Source: MLIST
Name: [oss-security] 20110911 CVE Request -- Django: v1.3.1, v1.2.7 multiple security flaws
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=690560
Type: Patch Information
External Source: UBUNTU
Name: USN-1613-1
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=737366
External Source: APPLE
Name: APPLE-SA-2011-10-12-3
External Source: CONFIRM
Name: http://hg.python.org/cpython/rev/b2934d98dac1/
Type: Patch Information
External Source: MLIST
Name: [oss-security] 20110913 Re: CVE Request -- Django: v1.3.1, v1.2.7 multiple security flaws
External Source: UBUNTU
Name: USN-1613-2
External Source: CONFIRM
Name: http://hg.python.org/cpython/file/b2934d98dac1/Misc/NEWS
External Source: UBUNTU
Name: USN-1592-1
External Source: UBUNTU
Name: USN-1596-1
External Source: CONFIRM
Name: https://www.djangoproject.com/weblog/2011/sep/09/
External Source: MLIST
Name: [oss-security] 20110324 CVE Request -- Python (urllib, urllib2): Improper management of ftp:// and file:// URL schemes
External Source: CONFIRM
Name: https://www.djangoproject.com/weblog/2011/sep/10/127/
External Source: MANDRIVA
Name: MDVSA-2011:096
External Source: CONFIRM
Name: http://hg.python.org/cpython/file/96a6c128822b/Misc/NEWS
External Source: MLIST
Name: [oss-security] 20110916 Re: CVE Request -- Django: v1.3.1, v1.2.7 multiple security flaws
External Source: SECUNIA
Name: 50858
External Source: CONFIRM
Name: http://support.apple.com/kb/HT5002
External Source: CONFIRM
Name: http://bugs.python.org/issue11662
Type: Patch Information

Technical Details

Vulnerability Type (View All)
  • Resource Management Errors (CWE-399)