Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2011-1521

Severity CVSS v4.0:
Pending analysis
Type:
CWE-399 Resource Management Errors
Publication date:
24/05/2011
Last modified:
11/04/2025

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.

Impact

Vector 2.0
AV:N/AC:L/Au:N/C:P/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 6.40 MEDIUM
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): None
Availability (A): Physical

Base Score 2.0
6.40
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:python:python:2.0:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.0.1:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.1:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.1.1:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.1.2:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.1.3:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.2:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.2.1:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.2.2:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.2.3:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.3.1:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.3.2:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.3.3:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.3.4:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.3.5:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools