| Name | CVE-2020-16125 |
| Description | gdm3 versions before 3.36.2 or 3.38.2 would start gnome-initial-setup if gdm3 can't contact the accountservice service via dbus in a timely manner; on Ubuntu (and potentially derivatives) this could be be chained with an additional issue that could allow a local user to create a new privileged account. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2434-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| gdm3 (PTS) | jessie, jessie (lts) | 3.14.1-7+deb8u1 | vulnerable |
| stretch (security), stretch (lts), stretch | 3.22.3-3+deb9u3 | fixed |
| buster | 3.30.2-3 | vulnerable |
| bullseye | 3.38.2.1-1 | fixed |
| bookworm | 43.0-3 | fixed |
| sid, trixie | 47.0-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| gdm3 | source | jessie | (unfixed) | end-of-life | | |
| gdm3 | source | stretch | 3.22.3-3+deb9u3 | | DLA-2434-1 | |
| gdm3 | source | (unstable) | 3.38.2-1 | | | |
Notes
[buster] - gdm3 <no-dsa> (Minor issue on Debian)
https://github.com/GNOME/gdm/commit/dc8235128c3a1fcd5da8f30ab6839d413d353f28
https://gitlab.gnome.org/GNOME/gdm/-/issues/642