Mission and Overview
NVD is the U.S. government repository of standards based vulnerability management data. This data enables automation of vulnerability management, security measurement, and compliance (e.g. FISMA).
Resource Status
NVD contains:

Last updated: 2/11/2016 12:02:31 PM

CVE Publication rate: 12.7

Email List

NVD provides four mailing lists to the public. For information and subscription instructions please visit NVD Mailing Lists

Workload Index
Vulnerability Workload Index: 5.04
About Us
NVD is a product of the NIST Computer Security Division and is sponsored by the Department of Homeland Security's National Cyber Security Division. It supports the U.S. government multi-agency (OSD, DHS, NSA, DISA, and NIST) Information Security Automation Program. It is the U.S. government content repository for the Security Content Automation Protocol (SCAP).

National Cyber Awareness System

Vulnerability Summary for CVE-2011-1521

Original release date: 05/24/2011
Last revised: 02/20/2014


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.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 6.4 MEDIUM
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

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

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

Technical Details

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