CVE-2021-33571

    Dashboard / Vulnerabilities / CVE-2021-33571

    CVE-2021-33571

    Published: 8 Jun 2021Last Modified: 15 Jul 2026

    Summary:

    Details: In Django 2.2 before 2.2.24, 3.x before 3.1.12, and 3.2 before 3.2.4, URLValidator, validate_ipv4_address, and validate_ipv46_address do not prohibit leading zero characters in octal literals. This may allow a bypass of access control that is based on IP addresses. (validate_ipv4_address and validate_ipv46_address are unaffected with Python 3.9.5+..) .

    References: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV/, https://groups.google.com/g/django-announce/c/sPyjSKMi8Eo, https://security.netapp.com/advisory/ntap-20210727-0004/, https://docs.djangoproject.com/en/3.2/releases/security/, https://github.com/django/django/commit/203d4ab9ebcd72fc4d6eb7398e66ed9e474e118e, https://github.com/django/django/commit/9f75e2e562fa0c0482f3dde6fc7399a9070b4a3d, https://github.com/django/django/commit/f27c38ab5d90f68c9dd60cabef248a570c0be8fc, https://www.djangoproject.com/weblog/2021/jun/02/security-releases/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 2a62cdcfec85938f40abb2e9e6a9ff497e02afe8
    Fixed -2da029d8540ab0b2e9edcba25c4d46c52853197f

    Affected versions

    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
    CVE-2021-33571 | CVE-DB