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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| foxcpp | maddy | >= 0.2.0 0.6.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | maddy | 0.6.3-r0 | — |
| Alpine v3.23 | maddy | 0.6.3-r0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/foxcpp/maddy | >= 0.2.0, < 0.6.3 | 0.6.3 | GHSA-4g76-w3xw-2x6w |