Robert Ancell LightDM up to 1.7.13 Xauthority access control

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-$5k	0.00

Summaryinfo

A vulnerability was found in Robert Ancell LightDM and classified as problematic. Impacted is an unknown function of the component Xauthority. Executing a manipulation can lead to access control. This vulnerability is registered as CVE-2013-4331. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Robert Ancell LightDM and classified as problematic. This vulnerability affects an unknown code of the component Xauthority. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality. CVE summarizes:

Light Display Manager (aka LightDM) 1.4.x before 1.4.3, 1.6.x before 1.6.2, and 1.7.x before 1.7.14 uses 0664 permissions for the temporary .Xauthority file, which allows local users to obtain sensitive information by reading the file.

The weakness was published 02/01/2014 (Website). The advisory is shared for download at bugs.launchpad.net. This vulnerability was named CVE-2013-4331 since 06/12/2013. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 69862 (Ubuntu 13.04 : lightdm vulnerability (USN-1950-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195952 (Ubuntu Security Notification for Lightdm Vulnerability (USN-1950-1)).

Upgrading to version 1.7.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (87137), Tenable (69862), SecurityFocus (BID 62329†) and Vulnerability Center (SBV-41667†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• Robert Ancell

Name

• LightDM

Version

• 1.4.0
• 1.4.1
• 1.4.2
• 1.6.0
• 1.6.1
• 1.7.0
• 1.7.1
• 1.7.2
• 1.7.3
• 1.7.4
• 1.7.5
• 1.7.6
• 1.7.7
• 1.7.8
• 1.7.9
• 1.7.10
• 1.7.11
• 1.7.12
• 1.7.13

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

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 69862
Nessus Name: Ubuntu 13.04 : lightdm vulnerability (USN-1950-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 866939
OpenVAS Name: Fedora Update for lightdm FEDORA-2013-16381
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: LightDM 1.7.0

Timelineinfo

06/12/2013 🔍
09/03/2013 +83 days 🔍
09/13/2013 +10 days 🔍
09/30/2013 +17 days 🔍
02/01/2014 +124 days 🔍
02/01/2014 +0 days 🔍
03/24/2015 +416 days 🔍
12/25/2024 +3564 days 🔍

Sourcesinfo

Advisory: USN-1950-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-4331 (🔍)
GCVE (CVE): GCVE-0-2013-4331
GCVE (VulDB): GCVE-100-66280

OVAL: 🔍

X-Force: 87137
SecurityFocus: 62329
Vulnerability Center: 41667 - LightDM before 1.4.3, 1.6.2, 1.7.14 Local Bypass Restrictions via .Xauthority Files with World-Readable Permissions, Low

Entryinfo

Created: 03/24/2015 15:54
Updated: 12/25/2024 16:51
Changes: 03/24/2015 15:54 (65), 05/12/2017 09:13 (3), 02/01/2022 08:35 (4), 12/25/2024 16:51 (18)
Complete: 🔍
Cache ID: 216:03A:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

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