Description
PostSRSd before 1.11 allows a denial of service (subprocess hang) if Postfix sends certain long data fields such as multiple concatenated email addresses. NOTE: the PostSRSd maintainer acknowledges "theoretically, this error should never occur ... I'm not sure if there's a reliable way to trigger this condition by an external attacker, but it is a security bug in PostSRSd nevertheless."
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | postsrsd | 1.10-2 | — |
| Debian 13 | postsrsd | 1.10-2 | — |
| Debian 12 | postsrsd | 1.10-2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | postsrsd | No fix yet | — |
| Ubuntu 25.10 | postsrsd | No fix yet | — |
| Ubuntu 24.04 LTS | postsrsd | No fix yet | — |
| Ubuntu 22.04 LTS | postsrsd | No fix yet | — |
| Ubuntu 20.04 LTS | postsrsd | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | postsrsd | No fix yet | — |
| Ubuntu 16.04 LTS | postsrsd | No fix yet | — |