Postfix · Postfix-Mta-Sts-Resolver · CVE-2019-16791
**Name of the Vulnerable Software and Affected Versions**
postfix-mta-sts-resolver versions prior to 0.5.1
**Description**
The issue affects all users and can cause the daemon to return an incorrect response under rare conditions, leading to a downgrade of the effective STS policy.
**Recommendations**
For versions prior to 0.5.1, update to version 0.5.1 to resolve the issue.
As a temporary workaround, users may apply the provided patches to older supported versions.