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.
3.6	$0-$5k	0.00

A vulnerability classified as problematic has been found in Robert Ancell lightdm up to 1.1.6. This affects an unknown functionality. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on availability. The summary by CVE is:

debian/guest-account in Light Display Manager (lightdm) 1.0.x before 1.0.6 and 1.1.x before 1.1.7, as used in Ubuntu Linux 11.10, allows local users to delete arbitrary files via a space in the name of a file in /tmp. NOTE: this identifier was SPLIT per ADT1/ADT2 due to different codebases and affected versions. CVE-2012-6648 has been assigned for the gdm-guest-session issue.

The weakness was disclosed 05/22/2014 by Ryan Lortie (Website). The advisory is shared at ubuntu.com. This vulnerability is uniquely identified as CVE-2012-0943 since 02/01/2012. The exploitability is told to be easy. An attack has to be approached locally. No form of authentication is needed for exploitation. Technical details are unknown but a public exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The exploit is shared for download at securityfocus.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 58340 (Ubuntu 10.04 LTS / 10.10 / 11.04 : gdm-guest-session vulnerability (USN-1399-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks.

Upgrading to version 1.1.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (73998) and Tenable (58340). The entry 69778 is pretty similar.

Productinfo

Vendor

• Robert Ancell

Name

• lightdm

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 1.0.3
• 1.0.4
• 1.0.5
• 1.1.0
• 1.1.1
• 1.1.2
• 1.1.3
• 1.1.4
• 1.1.5
• 1.1.6

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: 3.6

VulDB Base Score: 4.0
VulDB Temp Score: 3.6
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
ATT&CK: T1068

Local: Yes
Remote: No

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 58340
Nessus Name: Ubuntu 10.04 LTS / 10.10 / 11.04 : gdm-guest-session vulnerability (USN-1399-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 840947
OpenVAS Name: Ubuntu Update for gdm-guest-session USN-1399-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: lightdm 1.1.1

Timelineinfo

02/01/2012 🔍
03/13/2012 +41 days 🔍
03/13/2012 +0 days 🔍
03/14/2012 +1 days 🔍
04/09/2013 +391 days 🔍
05/22/2014 +408 days 🔍
05/22/2014 +0 days 🔍
03/25/2015 +307 days 🔍
03/21/2022 +2553 days 🔍

Sourcesinfo

Advisory: USN-1399-1
Researcher: Ryan Lortie
Status: Not defined
Confirmation: 🔍

CVE: CVE-2012-0943 (🔍)
OVAL: 🔍

X-Force: 73998
Vulnerability Center: 39058 - Light Display Manager 1.0.6 Local Arbitrary File Deletion, Low
SecurityFocus: 52452 - LightDM Arbitrary File Deletion Vulnerability

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

Entryinfo

Created: 03/25/2015 16:45
Updated: 03/21/2022 17:24
Changes: 03/25/2015 16:45 (67), 04/26/2017 23:53 (8), 03/21/2022 17:17 (3), 03/21/2022 17:24 (2)
Complete: 🔍

Discussion

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