Description
srs2.c in PostSRSd before 1.10 allows remote attackers to cause a denial of service (CPU consumption) via a long timestamp tag in an SRS address.
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 | 1.10-1 | — |
| Debian 13 | postsrsd | 1.10-1 | — |
| Debian 12 | postsrsd | 1.10-1 | — |
| Debian 9 | postsrsd | 1.4-1+deb9u1 | DLA-2502-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | postsrsd | No fix yet | — |
| Ubuntu 20.04 LTS | postsrsd | No fix yet | — |
| Ubuntu 18.04 LTS | postsrsd | 1.4-1ubuntu0.1 | USN-4730-1 |
| Ubuntu 16.04 LTS | postsrsd | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP3 | postsrsd | 1.11-bp153.2.3.1 | openSUSE-SU-2021:1642-1 |
| SUSE Package Hub 15 SP2 | postsrsd | 1.11-bp152.4.3.1 | openSUSE-SU-2021:0669-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | postsrsd | 1.11-1.3 | openSUSE-SU-2024:11188-1 |
| openSUSE Leap 15.3 | postsrsd | 1.11-bp153.2.3.1 | openSUSE-SU-2021:1642-1 |
| openSUSE Leap 15.2 | postsrsd | 1.11-lp152.4.3.1 | openSUSE-SU-2021:0646-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | postsrsd | 1.6-r4 | — |
| Alpine v3.23 | postsrsd | 1.6-r4 | — |
| Alpine v3.22 | postsrsd | 1.6-r4 | — |
| Alpine v3.21 | postsrsd | 1.6-r4 | — |
| Alpine v3.20 | postsrsd | 1.6-r4 | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | postsrsd | 1.6-r4 | — |
| Alpine v3.18 | postsrsd | 1.6-r4 | — |
| Alpine v3.17 | postsrsd | 1.6-r4 | — |
| Alpine v3.16 | postsrsd | 1.6-r4 | — |
| Alpine v3.15 | postsrsd | 1.6-r4 | — |
| Alpine v3.14 | postsrsd | 1.6-r4 | — |
| Alpine v3.13 | postsrsd | 1.6-r4 | — |
| Alpine v3.12 | postsrsd | 1.6-r4 | — |
Advisories 6
- USN-4730-1 postsrsd vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-2502-1 postsrsd - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:11188-1 postsrsd-1.11-1.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0669-1 Security update for postsrsd SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1642-1 Security update for postrsd SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0646-1 Security update for postsrsd SUSE / openSUSE Security Updates · Feb 4, 2026