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.
https://exchange.xforce.ibmcloud.com/vulnerabilities/53727
http://www.vupen.com/english/advisories/2009/2871
http://www.securityfocus.com/bid/36655
http://www.openwall.com/lists/oss-security/2009/10/13/6
http://www.djangoproject.com/weblog/2009/oct/09/security/
http://www.debian.org/security/2009/dsa-1905
http://secunia.com/advisories/36968
http://secunia.com/advisories/36948
http://groups.google.com/group/django-users/browse_thread/thread/15df9e45118dfc51/
Published: 2009-10-13
Updated: 2025-04-09
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Severity: Medium
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity: High
Base Score: 8.7
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Severity: High