Description
Gajim 1.2.x and 1.3.x before 1.3.3 allows remote attackers to cause a denial of service (crash) via a crafted XMPP Last Message Correction (XEP-0308) message in multi-user chat, where the message ID equals the correction ID.
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 | python-nbxmpp | 2.0.4-1 | — |
| Debian 13 | python-nbxmpp | 2.0.4-1 | — |
| Debian 12 | python-nbxmpp | 2.0.4-1 | — |
| Debian 11 | python-nbxmpp | 2.0.2-1+deb11u1 | DSA-5064-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | python-nbxmpp | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | gajim | 1.3.3-1.1 | openSUSE-SU-2024:11734-1 |
Advisories 2
- DSA-5064-1 python-nbxmpp - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:11734-1 gajim-1.3.3-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026