PYSEC-2009-4

    Dashboard / Vulnerabilities / PYSEC-2009-4

    PYSEC-2009-4

    Published: 13 Oct 2009Last Modified: 10 Jun 2026

    Summary:

    Details: 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.

    References: http://www.securityfocus.com/bid/36655, http://groups.google.com/group/django-users/browse_thread/thread/15df9e45118dfc51/, http://secunia.com/advisories/36948, http://www.debian.org/security/2009/dsa-1905, http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=550457, http://www.vupen.com/english/advisories/2009/2871, http://www.djangoproject.com/weblog/2009/oct/09/security/, http://secunia.com/advisories/36968, http://www.openwall.com/lists/oss-security/2009/10/13/6, https://exchange.xforce.ibmcloud.com/vulnerabilities/53727, https://github.com/advisories/GHSA-p6m5-h7pp-v2x5

    Affected packages

    Package

    Name: django

    Purl: pkg:pypi/django

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 1.0
    Fixed -1.0.4

    Affected versions

    1.0.1
    1.0.2
    1.0.3

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High