CVE-2023-27582
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.02%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.02% probability · 61th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-287, CWE-305
- Affected
- maddy project/maddy
- Source
- security-advisories@github.com
References
- https://github.com/foxcpp/maddy/commit/55a91a37b71210f34f98f4d327c30308fe24399aPatch
- https://github.com/foxcpp/maddy/commit/9f58cb64b39cdc01928ec463bdb198c4c2313a9cPatch
- https://github.com/foxcpp/maddy/releases/tag/v0.6.3Release Notes
- https://github.com/foxcpp/maddy/security/advisories/GHSA-4g76-w3xw-2x6wPatch, Vendor Advisory
- https://github.com/foxcpp/maddy/commit/55a91a37b71210f34f98f4d327c30308fe24399aPatch
- https://github.com/foxcpp/maddy/commit/9f58cb64b39cdc01928ec463bdb198c4c2313a9cPatch
- https://github.com/foxcpp/maddy/releases/tag/v0.6.3Release Notes
- https://github.com/foxcpp/maddy/security/advisories/GHSA-4g76-w3xw-2x6wPatch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.