Description
In Irssi before 1.0.3, when receiving a DCC message without source nick/host, it attempts to dereference a NULL pointer. Thus, remote IRC servers can cause a crash.
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 | irssi | 1.0.3-1 | — |
| Debian 13 | irssi | 1.0.3-1 | — |
| Debian 12 | irssi | 1.0.3-1 | — |
| Debian 9 | irssi | 1.0.2-1+deb9u1 | DSA-3885-1 |
| Debian 8 | irssi | 0.8.17-1+deb8u4 | DSA-3885-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | irssi | 0.8.15-5+deb7u2 | DLA-1088-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | irssi | 0.8.19-1ubuntu1.4 | USN-3317-1 |
| Ubuntu 14.04 LTS | irssi | 0.8.15-5ubuntu3.2 | USN-3317-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 12 | irssi | 1.0.3-25.1 | openSUSE-SU-2017:1515-1, openSUSE-SU-2017:1505-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | irssi | 1.2.3-2.4 | openSUSE-SU-2024:10865-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | irssi | 1.0.3-r0 | — |
| Alpine v3.23 | irssi | 1.0.3-r0 | — |
| Alpine v3.22 | irssi | 1.0.3-r0 | — |
| Alpine v3.21 | irssi | 1.0.3-r0 | — |
| Alpine v3.20 | irssi | 1.0.3-r0 | — |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | irssi | 1.0.3-r0 | — |
| Alpine v3.18 | irssi | 1.0.3-r0 | — |
| Alpine v3.17 | irssi | 1.0.3-r0 | — |
| Alpine v3.16 | irssi | 1.0.3-r0 | — |
| Alpine v3.15 | irssi | 1.0.3-r0 | — |
| Alpine v3.14 | irssi | 1.0.3-r0 | — |
| Alpine v3.13 | irssi | 1.0.3-r0 | — |
| Alpine v3.12 | irssi | 1.0.3-r0 | — |
| Alpine v3.11 | irssi | 1.0.3-r0 | — |
| Alpine v3.10 | irssi | 1.0.3-r0 | — |
| Alpine v3.9 | irssi | 1.0.3-r0 | — |
| Alpine v3.8 | irssi | 1.0.3-r0 | — |
| Alpine v3.7 | irssi | 1.0.3-r0 | — |
| Alpine v3.6 | irssi | 1.0.3-r0 | — |
| Alpine v3.5 | irssi | 0.8.21-r1 | — |
| Alpine v3.4 | irssi | 0.8.21-r1 | — |
| Alpine v3.3 | irssi | 0.8.21-r1 | — |
Advisories 6
- USN-3317-1 irssi vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3885-1 irssi - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1088-1 irssi - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10865-1 irssi-1.2.3-2.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2017:1515-1 Security update for irssi SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2017:1505-1 Security update for irssi SUSE / openSUSE Security Updates · Feb 4, 2026
References
- DSA-3885 vendor-advisory
- http://openwall.com/lists/oss-security/2017/06/06/4
- https://irssi.org/security/irssi_sa_2017_06.txt
- 99015 vdb-entry
- 1038621 vdb-entry