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CVE-2009-3695

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Date: October 13, 2009

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.

Language: Python

Severity Score

Related Resources (21)

https://web.archive.org/web/20091013093057/http://secunia.com/advisories/36968
http://www.openwall.com/lists/oss-security/2009/10/13/6
http://www.djangoproject.com/weblog/2009/oct/09/security
https://web.archive.org/web/20091017070244/http://secunia.com/advisories/36948
http://secunia.com/advisories/36968
http://www.vupen.com/english/advisories/2009/2871
http://secunia.com/advisories/36948
https://github.com/django/django/commit/e3e992e18b368fcd56aabafc1b5bf80a6e11b495
http://groups.google.com/group/django-users/browse_thread/thread/15df9e45118dfc51/
http://www.debian.org/security/2009/dsa-1905
https://nvd.nist.gov/vuln/detail/CVE-2009-3695
https://github.com/django/django
http://www.securityfocus.com/bid/36655
https://web.archive.org/web/20200228171918/http://www.securityfocus.com/bid/36655
http://groups.google.com/group/django-users/browse_thread/thread/15df9e45118dfc51
https://exchange.xforce.ibmcloud.com/vulnerabilities/53727
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=550457
http://www.djangoproject.com/weblog/2009/oct/09/security/
https://github.com/django/django/commit/594a28a9044120bed58671dde8a805c9e0f6c79a
https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2009-4.yaml
https://www.mend.io/vulnerability-database/CVE-2009-3695

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Inefficient Regular Expression Complexity

CWE-1333

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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