CVE-2019-16791: downgrade of effective Strict Transport Security (STS) policy in postfix-mta-sts-resolver
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
Other sources
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 Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2019-16791?
CVE-2019-16791 is considered a medium severity vulnerability due to the potential impact on the effective STS policy.
How do I fix CVE-2019-16791?
To fix CVE-2019-16791, upgrade to version 0.5.1 of postfix-mta-sts-resolver or a later version.
Who is affected by CVE-2019-16791?
CVE-2019-16791 affects all users of postfix-mta-sts-resolver versions prior to 0.5.1.
What impact does CVE-2019-16791 have?
CVE-2019-16791 can cause users to receive incorrect responses from the daemon, potentially leading to a downgrade of the effective STS policy.
Is there a workaround for CVE-2019-16791?
No specific workaround is suggested for CVE-2019-16791 other than upgrading to the patched version.