| Name | CVE-2009-1959 |
| Description | Off-by-one error in the event_wallops function in fe-common/irc/fe-events.c in irssi 0.8.13 allows remote IRC servers to cause a denial of service (crash) via an empty command, which triggers a one-byte buffer under-read and a one-byte buffer underflow. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 531357, 532607 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| irssi (PTS) | jessie, jessie (lts) | 0.8.17-1+deb8u5 | fixed |
| stretch (security), stretch (lts), stretch | 1.0.7-1~deb9u2 | fixed |
| buster | 1.2.0-2+deb10u1 | fixed |
| bullseye | 1.2.3-1 | fixed |
| bookworm | 1.4.3-2 | fixed |
| sid, trixie | 1.4.5-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| irssi | source | etch | 0.8.10-3 | | | |
| irssi | source | lenny | 0.8.12-7 | | | |
| irssi | source | (unstable) | 0.8.13-2 | low | | 531357, 532607 |
Notes
exploitability limited, DoS rather obscure attack scenario