GHSA-h92m-42h4-82f6

    Dashboard / Vulnerabilities / GHSA-h92m-42h4-82f6

    GHSA-h92m-42h4-82f6

    Published: 5 Jul 2019Last Modified: 10 Sept 2026

    Summary: postfix-mta-sts-resolver Algorithm Downgrade vulnerability

    Details: ## Incorrect query parsing ### Impact All users of versions prior to 0.5.1 can receive incorrect response from daemon under rare conditions, rendering downgrade of effective STS policy. ### Patches Problem has been patched in version 0.5.1 ### Workarounds Users may remediate this vulnerability without upgrading by applying [these patches](https://gist.github.com/Snawoot/b9da85d6b26dea5460673b29df1adc6b) to older suppoorted versions. ### For more information If you have any questions or comments about this advisory: * Open an issue in [postfix-mta-sts-resolver repo](https://github.com/Snawoot/postfix-mta-sts-resolver) * Email me at [vladislav at vm-0 dot com](mailto:[email protected])

    References: https://github.com/Snawoot/postfix-mta-sts-resolver/security/advisories/GHSA-h92m-42h4-82f6, https://nvd.nist.gov/vuln/detail/CVE-2019-16791, https://gist.github.com/Snawoot/b9da85d6b26dea5460673b29df1adc6b, https://github.com/Snawoot/postfix-mta-sts-resolver, https://github.com/pypa/advisory-database/tree/main/vulns/postfix-mta-sts-resolver/PYSEC-2020-174.yaml

    Affected packages

    Package

    Name: postfix-mta-sts-resolver

    Purl: pkg:pypi/postfix-mta-sts-resolver

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.5.1

    Affected versions

    0.1.1
    0.1.2
    0.1.3
    0.1.4
    0.1.5

    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