id: PYSEC-2020-174
details: In postfix-mta-sts-resolver before 0.5.1, All users can receive incorrect
  response from daemon under rare conditions, rendering downgrade of effective STS
  policy.
affected:
- package:
    name: postfix-mta-sts-resolver
    ecosystem: PyPI
    purl: pkg:pypi/postfix-mta-sts-resolver
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: "0"
    - fixed: 0.5.1
  versions:
  - 0.1.1
  - 0.1.2
  - 0.1.3
  - 0.1.4
  - 0.1.5
  - 0.2.0
  - 0.2.1
  - 0.2.2
  - 0.2.3
  - 0.2.4
  - 0.2.5
  - 0.2.7
  - 0.2.8
  - 0.2.9
  - 0.3.0
  - 0.4.0
  - 0.4.1
  - 0.4.2
  - 0.4.3
  - 0.4.4
  - 0.4.5
  - 0.5.0
references:
- type: ADVISORY
  url: https://github.com/Snawoot/postfix-mta-sts-resolver/security/advisories/GHSA-h92m-42h4-82f6
- type: WEB
  url: https://gist.github.com/Snawoot/b9da85d6b26dea5460673b29df1adc6b
aliases:
- CVE-2019-16791
- GHSA-h92m-42h4-82f6
modified: "2020-10-23T18:18:00Z"
published: "2020-01-22T02:15:00Z"