Vulnerability CVE-2014-0979
Published: 2014-01-22   Modified: 2014-01-23

Description:
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.

Type:

CWE-Other

CVSS2 => (AV:L/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
2.1/10
2.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Opensuse -> Opensuse 
Novell -> Opensuse 
Lightdm gtk+ greeter project -> Lightdm gtk+ greeter 

 References:
http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128117.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128150.html
http://lists.opensuse.org/opensuse-updates/2014-01/msg00048.html
http://www.openwall.com/lists/oss-security/2014/01/07/15
http://www.securityfocus.com/bid/64679
https://bugs.launchpad.net/lightdm-gtk-greeter/+bug/1266449
https://bugzilla.novell.com/show_bug.cgi?id=857303
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