Python up to 3.1.3 resource management

CVSS Meta Temp Score
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Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.

A vulnerability, which was classified as critical, was found in Python (Programming Language Software). This affects an unknown functionality. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on confidentiality, and availability. The summary by CVE is:

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.

The weakness was presented 05/24/2011 as Bug 690560 as confirmed bug report (Bugzilla). The advisory is shared at This vulnerability is uniquely identified as CVE-2011-1521. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 75608 (openSUSE Security Update : libpython2_6-1_0 (openSUSE-SU-2011:0484-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 216004 (VMWare ESXi 4.1.0 Patch Release ESXi410-201201001 Missing (KB2009137)).

Upgrading to version 2.1.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (75608). See 5322, 51038, 50685 and 53383 for similar entries.






CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Resource management
CWE: CWE-399 / CWE-404
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 75608
Nessus Name: openSUSE Security Update : libpython2_6-1_0 (openSUSE-SU-2011:0484-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 880556
OpenVAS Name: CentOS Update for python CESA-2011:0491 centos4 i386
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Python 2.1.2


03/24/2011 🔍
03/28/2011 +3 days 🔍
05/05/2011 +38 days 🔍
05/18/2011 +13 days 🔍
05/24/2011 +6 days 🔍
05/24/2011 +0 days 🔍
06/13/2014 +1116 days 🔍
03/23/2015 +283 days 🔍
11/07/2021 +2421 days 🔍


Advisory: Bug 690560
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-1521 (🔍)

Vulnerability Center: 31484 - Python urllib and urllib2 Remote Sensitive Information Disclosure or Denial of Service, Medium
SecurityFocus: 47024 - Python 'urllib' and 'urllib2' Modules Information Disclosure and Denial of Service Vulnerabilities
Secunia: 50858

See also: 🔍


Created: 03/23/2015 04:50 PM
Updated: 11/07/2021 06:35 PM
Changes: 03/23/2015 04:50 PM (66), 03/22/2017 02:17 PM (9), 11/07/2021 06:28 PM (5), 11/07/2021 06:35 PM (1)
Complete: 🔍


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