foxcpp/maddy · Security
Full authentication bypass if SASL authorization username is specified
- GHSA ID
- GHSA-4g76-w3xw-2x6w
- CVE ID
- CVE-2023-27582
- Severity
- critical
- Published
- Updated
- CVSS
- 9.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- CVSS v3
- 9.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Description
Impact
maddy 0.2.0 - 0.6.2 allows a full authentication bypass if SASL authorization username is specified when using the PLAIN authentication mechanisms. Instead of validating the specified authorization username, it is accepted as is after checking the credentials for the authentication username.
Patches
maddy 0.6.3 includes the fix for the bug.
Workarounds
There is no way to fix the issue without upgrading.
References
- Commit that introduced the vulnerable code: https://github.com/foxcpp/maddy/commit/55a91a37b71210f34f98f4d327c30308fe24399a
- Fix: https://github.com/foxcpp/maddy/commit/9f58cb64b39cdc01928ec463bdb198c4c2313a9c
CWEs
- CWE-287 · Improper Authentication
References
- https://github.com/foxcpp/maddy/security/advisories/GHSA-4g76-w3xw-2x6w ↗
- https://nvd.nist.gov/vuln/detail/CVE-2023-27582 ↗
- https://github.com/foxcpp/maddy/commit/55a91a37b71210f34f98f4d327c30308fe24399a ↗
- https://github.com/foxcpp/maddy/commit/9f58cb64b39cdc01928ec463bdb198c4c2313a9c ↗
- https://github.com/foxcpp/maddy/releases/tag/v0.6.3 ↗
- https://github.com/advisories/GHSA-4g76-w3xw-2x6w ↗