CVE-2014-0979

NameCVE-2014-0979
DescriptionThe start_authentication function in lightdm-gtk-greeter.c in LightDM GTK+ Greeter before 1.7.1 does not properly handle the return value from the lightdm_greeter_get_authentication_user function, which allows local users to cause a denial of service (NULL pointer dereference) via an empty username.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs734472

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
lightdm-gtk-greeter (PTS)bookworm, bullseye2.0.8-2fixed
sid, trixie2.0.9-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
lightdm-gtk-greetersourcewheezy(not affected)
lightdm-gtk-greetersource(unstable)1.6.1-5734472

Notes

https://bugs.launchpad.net/lightdm-gtk-greeter/+bug/1266449
https://bugzilla.suse.com/show_bug.cgi?id=857303
[wheezy] - lightdm-gtk-greeter <not-affected> (in Wheezy, lightdm restarts when the greeter crashes, so there's no DoS)

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