Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWg5Mm0tNDJoNC04MmY2

postfix-mta-sts-resolver Algorithm Downgrade vulnerability

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 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
• Email me at vladislav at vm-0 dot com

Permalink: https://github.com/advisories/GHSA-h92m-42h4-82f6
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWg5Mm0tNDJoNC04MmY2
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 5 years ago
Updated: about 1 month ago

CVSS Score: 6.9
CVSS vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N

EPSS Percentage: 0.00105
EPSS Percentile: 0.43686

Identifiers: GHSA-h92m-42h4-82f6, CVE-2019-16791
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/pypa/advisory-database/tree/main/vulns/postfix-mta-sts-resolver/PYSEC-2020-174.yaml
• https://github.com/advisories/GHSA-h92m-42h4-82f6

Repository: https://github.com/Snawoot/postfix-mta-sts-resolver
Blast Radius: 5.8

Affected Packages