Critical severityNVD Advisory· Published Mar 13, 2023· Updated Feb 25, 2025
Full authentication bypass if SASL authorization username is specified
CVE-2023-27582
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/foxcpp/maddyGo | >= 0.2.0, < 0.6.3 | 0.6.3 |
Affected products
2- foxcpp/maddyv5Range: >= 0.2.0 0.6.3
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-4g76-w3xw-2x6wghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2023-27582ghsaADVISORY
- github.com/foxcpp/maddy/commit/55a91a37b71210f34f98f4d327c30308fe24399aghsax_refsource_MISCWEB
- github.com/foxcpp/maddy/commit/9f58cb64b39cdc01928ec463bdb198c4c2313a9cghsax_refsource_MISCWEB
- github.com/foxcpp/maddy/releases/tag/v0.6.3ghsax_refsource_MISCWEB
- github.com/foxcpp/maddy/security/advisories/GHSA-4g76-w3xw-2x6wghsax_refsource_CONFIRMWEB
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