Robert Ancell LightDM up to 0.9.2 dmrc.c link following

CVSS Meta Temp Score
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CTI Interest Score
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3.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Robert Ancell LightDM up to 0.9.2. It has been rated as problematic. Affected is an unknown function of the file dmrc.c. Performing a manipulation results in link following. This vulnerability is cataloged as CVE-2011-3153. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Robert Ancell LightDM up to 0.9.2. This affects an unknown function of the file dmrc.c. 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 confidentiality. The summary by CVE is:

dmrc.c in Light Display Manager (aka LightDM) before 1.1.1 allows local users to read arbitrary files via a symlink attack on ~/.dmrc.

The weakness was shared 03/06/2014 (Website). The advisory is shared at bugs.launchpad.net. This vulnerability is uniquely identified as CVE-2011-3153 since 08/16/2011. An attack has to be approached locally. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 74566 (openSUSE Security Update : lightdm (openSUSE-SU-2012:0354-1)), 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 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 Tenable (74566), SecurityFocus (BID 50511†), Secunia (SA46868†) and Vulnerability Center (SBV-34152†). The entries VDB-60246 and VDB-72731 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

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

NVD Base Score: 🔍

Exploitinginfo

Class: Link following
CWE: CWE-59
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 74566
Nessus Name: openSUSE Security Update : lightdm (openSUSE-SU-2012:0354-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

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

08/16/2011 🔍
11/03/2011 +79 days 🔍
11/15/2011 +12 days 🔍
11/16/2011 +1 days 🔍
12/29/2011 +43 days 🔍
03/06/2014 +798 days 🔍
03/06/2014 +0 days 🔍
06/13/2014 +99 days 🔍
03/24/2015 +284 days 🔍
05/07/2026 +4062 days 🔍

Sourcesinfo

Advisory: USN-1262-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-3153 (🔍)
GCVE (CVE): GCVE-0-2011-3153
GCVE (VulDB): GCVE-100-66549

OVAL: 🔍

SecurityFocus: 50511 - LightDM 'xsession_setup()' Symlink Attack Local Privilege Escalation Vulnerability
Secunia: 46868 - LightDM "~/.dmrc" Privilege Escalation Security Issue, Less Critical
Vulnerability Center: 34152 - LightDM <1.0.6 Local Information Disclosure due to .dmrc Files Improper Privileges Handling, Low

See also: 🔍

Entryinfo

Created: 03/24/2015 15:54
Updated: 05/07/2026 05:01
Changes: 03/24/2015 15:54 (65), 04/09/2017 13:12 (12), 02/03/2022 09:41 (3), 02/03/2022 09:46 (1), 05/07/2026 05:01 (17)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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