Novell openSUSE 12.2/12.3/13.1 lightdm-gtk-greeter.c lightdm_greeter_get_authentication_user null pointer dereference

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Novell openSUSE 12.2/12.3/13.1. It has been declared as problematic. Impacted is the function lightdm_greeter_get_authentication_user of the file lightdm-gtk-greeter.c. Such manipulation leads to null pointer dereference. This vulnerability is referenced as CVE-2014-0979. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 166725 (OpenSuSE Security Update for lightdm-gtk-greeter (openSUSE-SU-2014:0071-1)).

Upgrading to version 13.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (90142), Tenable (75386), SecurityFocus (BID 64679†), Secunia (SA56211†) and Vulnerability Center (SBV-43123†). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

Version

License

Support

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.0
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

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: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: openSUSE 13.1

Timelineinfo

01/06/2014 🔍
01/06/2014 +0 days 🔍
01/07/2014 +1 days 🔍
01/08/2014 +1 days 🔍
01/22/2014 +14 days 🔍
01/22/2014 +0 days 🔍
02/03/2014 +12 days 🔍
06/13/2014 +130 days 🔍
03/24/2015 +284 days 🔍
12/20/2024 +3559 days 🔍

Sourcesinfo

Vendor: novell.com

Advisory: Bug 857303
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-0979 (🔍)
GCVE (CVE): GCVE-0-2014-0979
GCVE (VulDB): GCVE-100-66170
X-Force: 90142
SecurityFocus: 64679 - LightDM GTK+ Greeter Local Denial of Service Vulnerability
Secunia: 56211 - LightDM GTK+ Greeter NULL Pointer Dereference Denial of Service Vulnerability, Less Critical
Vulnerability Center: 43123 - LightDM Greeter Local DoS Vulnerability via an Empty Username, Low

Entryinfo

Created: 03/24/2015 15:54
Updated: 12/20/2024 18:30
Changes: 03/24/2015 15:54 (72), 05/20/2017 10:16 (7), 01/31/2022 16:38 (3), 12/20/2024 18:30 (18)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you know our Splunk app?

Download it now for free!