CVE-2014-0979: Null Pointer Dereference
First published: Thu Jan 23 2014(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| SUSE Linux | =12.2 | |
| SUSE Linux | =12.3 | |
| SUSE Linux | =13.1 | |
| LightDM GTK+ Greeter | <=1.7.0 | |
| LightDM GTK+ Greeter | =1.1.1 | |
| LightDM GTK+ Greeter | =1.1.2 | |
| LightDM GTK+ Greeter | =1.1.3 | |
| LightDM GTK+ Greeter | =1.1.4 | |
| LightDM GTK+ Greeter | =1.1.5 | |
| LightDM GTK+ Greeter | =1.1.6 | |
| LightDM GTK+ Greeter | =1.3.0 | |
| LightDM GTK+ Greeter | =1.3.1 | |
| LightDM GTK+ Greeter | =1.5.0 | |
| LightDM GTK+ Greeter | =1.5.1 | |
| LightDM GTK+ Greeter | =1.5.2 | |
| LightDM GTK+ Greeter | =1.6.0 | |
| LightDM GTK+ Greeter | =1.6.1 |
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Reference Links
- 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://secunia.com/advisories/56211
- http://secunia.com/advisories/56423
- 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
Frequently Asked Questions
What is the severity of CVE-2014-0979?
CVE-2014-0979 has been classified as a medium severity vulnerability due to its potential to cause a denial of service.
How do I fix CVE-2014-0979?
To fix CVE-2014-0979, update LightDM GTK+ Greeter to version 1.7.1 or later.
What systems are affected by CVE-2014-0979?
CVE-2014-0979 affects LightDM GTK+ Greeter versions up to and including 1.7.0 and specific versions of openSUSE.
What type of vulnerability is CVE-2014-0979?
CVE-2014-0979 is a local denial of service vulnerability caused by improper handling of user input.
Can CVE-2014-0979 be exploited remotely?
No, CVE-2014-0979 can only be exploited by local users with access to the affected system.
- agent/type
- agent/references
- agent/weakness
- agent/severity
- agent/author
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/first-publish-date
- agent/event
- agent/source
- agent/tags
- agent/softwarecombine
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/opensuse
- canonical/suse linux
- version/suse linux/12.2
- version/suse linux/12.3
- version/suse linux/13.1
- vendor/lightdm gtk\+ greeter project
- canonical/lightdm gtk+ greeter
- version/lightdm gtk+ greeter/1.7.0
- version/lightdm gtk+ greeter/1.1.1
- version/lightdm gtk+ greeter/1.1.2
- version/lightdm gtk+ greeter/1.1.3
- version/lightdm gtk+ greeter/1.1.4
- version/lightdm gtk+ greeter/1.1.5
- version/lightdm gtk+ greeter/1.1.6
- version/lightdm gtk+ greeter/1.3.0
- version/lightdm gtk+ greeter/1.3.1
- version/lightdm gtk+ greeter/1.5.0
- version/lightdm gtk+ greeter/1.5.1
- version/lightdm gtk+ greeter/1.5.2
- version/lightdm gtk+ greeter/1.6.0
- version/lightdm gtk+ greeter/1.6.1