CVE-2020-16125

NameCVE-2020-16125
Descriptiongdm3 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2434-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
gdm3 (PTS)stretch3.22.3-3+deb9u2vulnerable
stretch (security)3.22.3-3+deb9u3fixed
buster3.30.2-3vulnerable
bullseye, sid3.38.2.1-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
gdm3sourcestretch3.22.3-3+deb9u3DLA-2434-1
gdm3source(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

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