GHSA-g3rq-g295-4j3m

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    GHSA-g3rq-g295-4j3m

    Published: 19 Mar 2021Last Modified: 14 Feb 2025

    Summary: Regular Expression Denial of Service (ReDoS) in Jinja2

    Details: This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDOS vulnerability of the regex is mainly due to the sub-pattern [a-zA-Z0-9._-]+.[a-zA-Z0-9._-]+ This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory.

    References: https://nvd.nist.gov/vuln/detail/CVE-2020-28493, https://github.com/pallets/jinja/pull/1343, https://github.com/pallets/jinja/commit/15ef8f09b659f9100610583938005a7a10472d4d, https://github.com/advisories/GHSA-g3rq-g295-4j3m, https://github.com/pallets/jinja, https://github.com/pallets/jinja/blob/ab81fd9c277900c85da0c322a2ff9d68a235b2e6/src/jinja2/utils.py%23L20, https://github.com/pypa/advisory-database/tree/main/vulns/jinja2/PYSEC-2021-66.yaml, https://lists.fedoraproject.org/archives/list/[email protected]/message/PVAKCOO7VBVUBM3Q6CBBTPBFNP5NDXF4, https://security.gentoo.org/glsa/202107-19, https://snyk.io/vuln/SNYK-PYTHON-JINJA2-1012994

    Affected packages

    Package

    Name: jinja2

    Purl: pkg:pypi/jinja2

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.11.3

    Affected versions

    2.0

    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
    GHSA-g3rq-g295-4j3m | CVE-DB