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

A vulnerability classified as problematic has been found in Robert Ancell LightDM. Affected is an unknown code of the component Xauthority. The manipulation with an unknown input leads to a link following vulnerability. CWE is classifying the issue as CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. This is going to have an impact on integrity. CVE summarizes:

LightDM before 1.0.6 allows local users to change ownership of arbitrary files via a symlink attack on ~/.Xauthority.

The weakness was released 02/17/2012 (Website). The advisory is available at ubuntu.com. This vulnerability is traded as CVE-2011-4105 since 10/18/2011. Local access is required to approach this attack. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 56854 (Ubuntu 11.10 : lightdm vulnerabilities (USN-1262-1)), 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 195214 (Ubuntu Security Notification for Lightdm Vulnerabilities (USN-1262-1)).

Upgrading to version 0.9.3 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (71120) and Tenable (56854). Entry connected to this vulnerability is available at 66549.

Productinfo

Vendor

• Robert Ancell

Name

• LightDM

Version

• 0.0.1
• 0.0.2
• 0.0.3
• 0.0.4
• 0.1.0
• 0.1.1
• 0.1.2
• 0.2.0
• 0.2.1
• 0.2.2
• 0.2.3
• 0.3.0
• 0.3.1
• 0.3.2
• 0.3.3
• 0.3.4
• 0.3.5
• 0.3.6
• 0.4.0
• 0.4.1
• 0.4.2
• 0.4.3
• 0.4.4
• 0.9.0
• 0.9.1
• 0.9.2
• 0.9.3
• 0.9.4
• 0.9.5
• 0.9.6
• 0.9.7
• 0.9.8
• 1.0.0
• 1.0.1
• 1.0.2
• 1.0.3
• 1.0.4
• 1.0.5
• 1.1.0

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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: Link following
CWE: CWE-59
CAPEC: 🔍
ATT&CK: 🔍

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: 56854
Nessus Name: Ubuntu 11.10 : lightdm vulnerabilities (USN-1262-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 840953
OpenVAS Name: Ubuntu Update for lightdm USN-1262-1
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 0.9.3

Timelineinfo

10/18/2011 🔍
11/02/2011 +15 days 🔍
11/15/2011 +13 days 🔍
12/29/2011 +44 days 🔍
02/17/2012 +50 days 🔍
02/17/2012 +0 days 🔍
03/23/2015 +1130 days 🔍
11/30/2021 +2444 days 🔍

Sourcesinfo

Advisory: USN-1262-1
Status: Not defined

CVE: CVE-2011-4105 (🔍)
OVAL: 🔍

X-Force: 71120
Vulnerability Center: 34150 - LightDM 1.0.4-1.0.5 Local File Access and Privilege Escalation Vulnerability via Symlink Attack, Medium
SecurityFocus: 50685 - RETIRED: LightDM '.Xauthority' Arbitrary File Access Vulnerability

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 11/30/2021 09:03
Changes: 03/23/2015 16:50 (61), 04/09/2017 13:12 (10), 11/30/2021 09:01 (3), 11/30/2021 09:03 (1)
Complete: 🔍

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