Django 1.0/1.1 denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability classified as problematic was found in Django 1.0/1.1 (Content Management System). This vulnerability affects an unknown function. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The program does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. CVE summarizes:

Algorithmic complexity vulnerability in the forms library in Django 1.0 before 1.0.4 and 1.1 before 1.1.1 allows remote attackers to cause a denial of service (CPU consumption) via a crafted (1) EmailField (email address) or (2) URLField (URL) that triggers a large amount of backtracking in a regular expression.

The weakness was presented 10/13/2009 (Website). The advisory is shared for download at This vulnerability was named CVE-2009-3695. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 42170 (FreeBSD : django -- denial-of-service attack (87917d6f-ba76-11de-bac2-001a4d563a0f)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks.

Upgrading to version 1.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (53727), Vulnerability Center (SBV-23771) and Tenable (42170).





  • open-source

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
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VulDB Reliability: 🔍



VulDB Base Score: 🔍
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Class: Denial of service
CWE: CWE-404
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

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Current Price Estimation: 🔍


Nessus ID: 42170
Nessus Name: FreeBSD : django -- denial-of-service attack (87917d6f-ba76-11de-bac2-001a4d563a0f)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 66052
OpenVAS Name: Debian Security Advisory DSA 1905-1 (python-django)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Django 1.0


10/09/2009 🔍
10/13/2009 +3 days 🔍
10/13/2009 +0 days 🔍
10/13/2009 +0 days 🔍
10/13/2009 +0 days 🔍
10/18/2009 +5 days 🔍
10/19/2009 +1 days 🔍
03/18/2015 +1976 days 🔍
08/23/2021 +2350 days 🔍


Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-3695 (🔍)
X-Force: 53727
Vulnerability Center: 23771 - Django 1.0 - 1.0.3 and 1.1 Forms Library Algorithmic Complexity Vulnerability Allows Remote DoS, High
SecurityFocus: 36655 - Django 'EmailField' and 'URLField' Remote Denial of Service Vulnerability


Created: 03/18/2015 03:15 PM
Updated: 08/23/2021 05:39 PM
Changes: 03/18/2015 03:15 PM (59), 02/15/2017 09:37 AM (8), 08/23/2021 05:31 PM (4), 08/23/2021 05:39 PM (1)
Complete: 🔍


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