Description
In postfix-mta-sts-resolver before 0.5.1, All users can receive incorrect response from daemon under rare conditions, rendering downgrade of effective STS policy.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Snawoot | postfix-mta-sts-resolver | < 0.5.1 | — |
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.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | postfix-mta-sts-resolver | No fix yet | — |
| Ubuntu 26.04 LTS | postfix-mta-sts-resolver | No fix yet | — |
| Ubuntu 25.10 | postfix-mta-sts-resolver | No fix yet | — |
| Ubuntu 24.04 LTS | postfix-mta-sts-resolver | No fix yet | — |
| Ubuntu 22.04 LTS | postfix-mta-sts-resolver | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | postfix-mta-sts-resolver | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | postfix-mta-sts-resolver | < 0.5.1 | 0.5.1 | GHSA-h92m-42h4-82f6 |