GHSA-h92m-42h4-82f6

postfix-mta-sts-resolver Algorithm Downgrade vulnerability

Source: GitHub Advisory Database (reviewed) High CVE-2019-16791

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	postfix-mta-sts-resolver	< 0.5.1	0.5.1

Details

As written in the advisory (Markdown source, shown as plain text).

## 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

External links from the advisory. They lead to third-party sites.