CVE-2023-27582

Full authentication bypass if SASL authorization username is specified

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.

Category

9.1
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.11%
Vendor Advisory github.com
Affected: foxcpp maddy
Published at:
Updated at:

References

Link Tags
https://github.com/foxcpp/maddy/security/advisories/GHSA-4g76-w3xw-2x6w patch vendor advisory
https://github.com/foxcpp/maddy/commit/55a91a37b71210f34f98f4d327c30308fe24399a patch
https://github.com/foxcpp/maddy/commit/9f58cb64b39cdc01928ec463bdb198c4c2313a9c patch
https://github.com/foxcpp/maddy/releases/tag/v0.6.3 release notes

Frequently Asked Questions

What is the severity of CVE-2023-27582?
CVE-2023-27582 has been scored as a critical severity vulnerability.
How to fix CVE-2023-27582?
To fix CVE-2023-27582, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-27582 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-27582 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-27582?
CVE-2023-27582 affects foxcpp maddy.
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