GHSA-2f9x-5v75-3qv4

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    GHSA-2f9x-5v75-3qv4

    Published: 4 Jan 2019Last Modified: 27 Nov 2024

    Summary: Django Denial-of-service possibility in truncatechars_html and truncatewords_html template filters

    Details: An issue was discovered in Django 2.0 before 2.0.3, 1.11 before 1.11.11, and 1.8 before 1.8.19. If django.utils.text.Truncator's chars() and words() methods were passed the html=True argument, they were extremely slow to evaluate certain inputs due to a catastrophic backtracking vulnerability in a regular expression. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which were thus vulnerable.

    References: https://nvd.nist.gov/vuln/detail/CVE-2018-7537, https://github.com/django/django/commit/94c5da1d17a6b0d378866c66b605102c19f7988c, https://github.com/django/django/commit/a91436360b79a6ff995c3e5018bcc666dfaf1539, https://github.com/django/django/commit/d17974a287a6ea2e361daff88fcc004cbd6835fa, https://access.redhat.com/errata/RHSA-2018:2927, https://access.redhat.com/errata/RHSA-2019:0265, https://github.com/advisories/GHSA-2f9x-5v75-3qv4, https://github.com/django/django, https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2018-6.yaml, https://lists.debian.org/debian-lts-announce/2018/03/msg00006.html, https://usn.ubuntu.com/3591-1, https://www.debian.org/security/2018/dsa-4161, https://www.djangoproject.com/weblog/2018/mar/06/security-releases

    Affected packages

    Package

    Name: django

    Purl: pkg:pypi/django

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 2.0
    Fixed -2.0.3

    Affected versions

    2.0
    2.0.1
    2.0.2

    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