Vulnerability Details : CVE-2014-0979
The 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.
Vulnerability category: Memory CorruptionDenial of service
Exploit prediction scoring system (EPSS) score for CVE-2014-0979
Probability of exploitation activity in the next 30 days: 0.04%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 6 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2014-0979
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
2.1
|
LOW | AV:L/AC:L/Au:N/C:N/I:N/A:P |
3.9
|
2.9
|
NIST |
References for CVE-2014-0979
-
http://lists.opensuse.org/opensuse-updates/2014-01/msg00048.html
openSUSE-SU-2014:0071-1: moderate: update for lightdm-gtk-greeter
-
http://www.securityfocus.com/bid/64679
LightDM GTK+ Greeter Local Denial of Service Vulnerability
-
http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128117.html
[SECURITY] Fedora 20 Update: lightdm-gtk-1.6.1-3.fc20
-
https://bugzilla.novell.com/show_bug.cgi?id=857303
Bug 857303 – VUL-0: CVE-2014-0979: lightdm/X crashes on empty username
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https://bugs.launchpad.net/lightdm-gtk-greeter/+bug/1266449
Bug #1266449 “greeter crashes on empty username” : Bugs : LightDM GTK+ Greeter
-
http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128150.html
[SECURITY] Fedora 19 Update: lightdm-gtk-1.6.1-3.fc19
-
http://www.openwall.com/lists/oss-security/2014/01/07/15
oss-security - Re: CVE request: lightdm-gtk-greeter - local DOS due to NULL pointer dereference
Products affected by CVE-2014-0979
- cpe:2.3:o:opensuse:opensuse:12.2:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:opensuse:12.3:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
- cpe:2.3:a:lightdm_gtk\+_greeter_project:lightdm_gtk\+_greeter:*:*:*:*:*:*:*:*
- cpe:2.3:a:lightdm_gtk\+_greeter_project:lightdm_gtk\+_greeter:1.5.2:*:*:*:*:*:*:*
- cpe:2.3:a:lightdm_gtk\+_greeter_project:lightdm_gtk\+_greeter:1.5.1:*:*:*:*:*:*:*
- cpe:2.3:a:lightdm_gtk\+_greeter_project:lightdm_gtk\+_greeter:1.1.3:*:*:*:*:*:*:*
- cpe:2.3:a:lightdm_gtk\+_greeter_project:lightdm_gtk\+_greeter:1.1.2:*:*:*:*:*:*:*
- cpe:2.3:a:lightdm_gtk\+_greeter_project:lightdm_gtk\+_greeter:1.3.0:*:*:*:*:*:*:*
- cpe:2.3:a:lightdm_gtk\+_greeter_project:lightdm_gtk\+_greeter:1.1.6:*:*:*:*:*:*:*
- cpe:2.3:a:lightdm_gtk\+_greeter_project:lightdm_gtk\+_greeter:1.6.1:*:*:*:*:*:*:*
- cpe:2.3:a:lightdm_gtk\+_greeter_project:lightdm_gtk\+_greeter:1.6.0:*:*:*:*:*:*:*
- cpe:2.3:a:lightdm_gtk\+_greeter_project:lightdm_gtk\+_greeter:1.1.5:*:*:*:*:*:*:*
- cpe:2.3:a:lightdm_gtk\+_greeter_project:lightdm_gtk\+_greeter:1.1.4:*:*:*:*:*:*:*
- cpe:2.3:a:lightdm_gtk\+_greeter_project:lightdm_gtk\+_greeter:1.5.0:*:*:*:*:*:*:*
- cpe:2.3:a:lightdm_gtk\+_greeter_project:lightdm_gtk\+_greeter:1.3.1:*:*:*:*:*:*:*
- cpe:2.3:a:lightdm_gtk\+_greeter_project:lightdm_gtk\+_greeter:1.1.1:*:*:*:*:*:*:*