GNOME Display Manager 3.4.1 Login disable-user-list=true null pointer dereference

HistoryDiffrelatejsonxmlCTI

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.
5.9	$0-$5k	0.00

Summaryinfo

A vulnerability marked as problematic has been reported in GNOME Display Manager 3.4.1. Affected by this issue is some unknown functionality of the component Login Handler. This manipulation of the argument disable-user-list=true causes null pointer dereference. The identification of this vulnerability is CVE-2013-7273. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability classified as problematic was found in GNOME Display Manager 3.4.1. Affected by this vulnerability is an unknown code of the component Login Handler. The manipulation of the argument disable-user-list=true with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

GNOME Display Manager (gdm) 3.4.1 and earlier, when disable-user-list is set to true, allows local users to cause a denial of service (unable to login) by pressing the cancel button after entering a user name.

The weakness was shared 07/30/2012 as 704284 as not defined bug report (Website). It is possible to read the advisory at bugzilla.gnome.org. This vulnerability is known as CVE-2013-7273 since 01/07/2014. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at SecurityFocus (BID 64714†), OSVDB (102544†) and SecurityTracker (ID 1030166†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

GNOME

Name

Display Manager

Version

3.4.1

License

open-source

Website

Vendor: https://www.gnome.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.2
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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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: 🔍
Access: Public
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/30/2012 🔍
01/07/2014 +526 days 🔍
01/07/2014 +0 days 🔍
01/28/2014 +21 days 🔍
04/29/2014 +91 days 🔍
04/30/2014 +1 days 🔍
04/02/2019 +1797 days 🔍

Sourcesinfo

Vendor: gnome.org

Advisory: 704284
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-7273 (🔍)
GCVE (CVE): GCVE-0-2013-7273
GCVE (VulDB): GCVE-100-12079
SecurityFocus: 64714 - GNOME GDM Local Denial of Service Vulnerability
OSVDB: 102544
SecurityTracker: 1030166

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/28/2014 10:19
Updated: 04/02/2019 00:12
Changes: 01/28/2014 10:19 (46), 04/02/2019 00:12 (16)
Complete: 🔍
Committer: olku
Cache ID: 216:6ED:103