Novell openSUSE 12.2/12.3/13.1 lightdm-gtk-greeter.c lightdm_greeter_get_authentication_user null pointer dereference
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
3.8 | $0-$5k | 0.00 |
A vulnerability, which was classified as problematic, has been found in Novell openSUSE 12.2/12.3/13.1 (Operating System). Affected by this issue is the function lightdm_greeter_get_authentication_user
of the file lightdm-gtk-greeter.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. CVE summarizes:
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.
The weakness was published 01/22/2014 as Bug 857303 as not defined bug report (Bugzilla). The advisory is available at bugzilla.novell.com. This vulnerability is handled as CVE-2014-0979 since 01/07/2014. The exploitation is known to be easy. Local access is required to approach this attack. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.
The vulnerability scanner Nessus provides a plugin with the ID 75386 (openSUSE Security Update : lightdm-gtk-greeter (openSUSE-SU-2014:0071-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks.
Upgrading to version 13.1 eliminates this vulnerability.
The vulnerability is also documented in the databases at X-Force (90142) and Tenable (75386).
Product
Type
Vendor
Name
Version
License
Support
- end of life
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 4.0VulDB Meta Temp Score: 3.8
VulDB Base Score: 4.0
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
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VulDB Base Score: 🔍
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VulDB Reliability: 🔍
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Exploiting
Class: Null pointer dereferenceCWE: CWE-476 / CWE-404
ATT&CK: Unknown
Local: Yes
Remote: No
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
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Current Price Estimation: 🔍
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Nessus ID: 75386
Nessus Name: openSUSE Security Update : lightdm-gtk-greeter (openSUSE-SU-2014:0071-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍
OpenVAS ID: 867500
OpenVAS Name: Fedora Update for lightdm-gtk FEDORA-2014-1647
OpenVAS File: 🔍
OpenVAS Family: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: openSUSE 13.1
Timeline
01/06/2014 🔍01/06/2014 🔍
01/07/2014 🔍
01/08/2014 🔍
01/22/2014 🔍
01/22/2014 🔍
02/03/2014 🔍
06/13/2014 🔍
03/24/2015 🔍
01/31/2022 🔍
Sources
Vendor: novell.comAdvisory: Bug 857303
Status: Not defined
Confirmation: 🔍
CVE: CVE-2014-0979 (🔍)
X-Force: 90142
Vulnerability Center: 43123 - LightDM Greeter Local DoS Vulnerability via an Empty Username, Low
SecurityFocus: 64679 - LightDM GTK+ Greeter Local Denial of Service Vulnerability
Secunia: 56211 - LightDM GTK+ Greeter NULL Pointer Dereference Denial of Service Vulnerability, Less Critical
Entry
Created: 03/24/2015 15:54Updated: 01/31/2022 16:38
Changes: 03/24/2015 15:54 (72), 05/20/2017 10:16 (7), 01/31/2022 16:38 (3)
Complete: 🔍
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