Ubuntu Linux 14.04 Lock Screen denial of service

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.
2.6	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Ubuntu Linux 14.04. This impacts an unknown function of the component Lock Screen. Performing a manipulation results in denial of service. Moreover, an exploit is present. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability classified as problematic has been found in Ubuntu Linux 14.04 (Operating System). This affects an unknown functionality of the component Lock Screen. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability.

The weakness was disclosed 04/16/2014 by Marco Agnese as Ubuntu 14.04: security problem in the lock screen as confirmed bug report (Website). The advisory is shared at bugs.launchpad.net. The exploitability is told to be difficult. 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. The advisory points out:

I am running Ubuntu 14.04 with all the packages updated. When the screen is locked with password, if I hold ENTER after some seconds the screen freezes and the lock screen crashes. After that I have the computer fully unlocked.

A public exploit has been developed by Marco Agnese and been published immediately after the advisory. The exploit is shared for download at bugs.launchpad.net. It is declared as proof-of-concept.

Applying a patch is able to eliminate this problem.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Operating System

Vendor

Ubuntu

Name

Linux

Version

14.04

License

open-source

Website

Vendor: https://www.ubuntu.com/

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 2.9
VulDB Meta Temp Score: 2.6

VulDB Base Score: 2.9
VulDB Temp Score: 2.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Marco Agnese
Download: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍

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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

04/16/2014 🔍
04/16/2014 +0 days 🔍
04/28/2014 +12 days 🔍
04/01/2019 +1799 days 🔍

Sourcesinfo

Vendor: ubuntu.com

Advisory: Ubuntu 14.04: security problem in the lock screen
Researcher: Marco Agnese
Status: Confirmed

GCVE (VulDB): GCVE-100-13077
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 04/28/2014 12:02
Updated: 04/01/2019 18:30
Changes: 04/28/2014 12:02 (47), 04/01/2019 18:30 (2)
Complete: 🔍
Cache ID: 216:643:103