CVE-2023-27582

GHSA-4g76-w3xw-2x6w, CVE-2023-27582

go/github.com/foxcpp/maddy

Authentication Bypass by Primary Weakness

maddy is a composable, all-in-one mail server. Starting with version 0.2.0 and prior to version 0.6.3, maddy allows a full authentication bypass if SASL authorization username is specified when using the PLAIN authentication mechanisms. Instead of validating the specified username, it is accepted as is after checking the credentials for the authentication username. maddy 0.6.3 includes the fix for the bug. There are no known workarounds.

All versions starting from 0.2.0 before 0.6.3

Upgrade to version 0.6.3 or above.

2023-03-16