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 was found in David Bagley xlockmore up to 5.42. It has been declared as problematic. Affected by this vulnerability is the function dispcrypt of the component Screen Lock. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

The (1) checkPasswd and (2) checkGroupXlockPasswds functions in xlockmore before 5.43 do not properly handle when a NULL value is returned upon an error by the crypt or dispcrypt function as implemented in glibc 2.17 and later, which allows attackers to bypass the screen lock via vectors related to invalid salts.

The weakness was published 05/30/2014 by mancha (Website). The advisory is shared at tux.org. This vulnerability is known as CVE-2013-4143 since 06/12/2013. The exploitation appears to be easy. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 69151 (Fedora 19 : xlockmore-5.43-1.fc19 (2013-13258)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks.

Upgrading to version 5.42 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (86101) and Tenable (69151).

Productinfo

Vendor

• David Bagley

Name

• xlockmore

Version

• 5.24
• 5.25
• 5.26
• 5.27
• 5.28
• 5.29
• 5.30
• 5.31
• 5.32
• 5.33
• 5.34
• 5.35
• 5.36
• 5.37
• 5.38
• 5.39
• 5.40
• 5.41
• 5.42

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: Null pointer dereference
CWE: CWE-476 / CWE-404
ATT&CK: Unknown

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: 69151
Nessus Name: Fedora 19 : xlockmore-5.43-1.fc19 (2013-13258)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 866748
OpenVAS Name: Fedora Update for xlockmore FEDORA-2013-13258
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: xlockmore 5.42

Timelineinfo

06/12/2013 🔍
07/14/2013 +32 days 🔍
07/14/2013 +0 days 🔍
07/31/2013 +17 days 🔍
08/29/2013 +29 days 🔍
05/30/2014 +274 days 🔍
05/30/2014 +0 days 🔍
03/25/2015 +299 days 🔍
03/22/2022 +2554 days 🔍

Sourcesinfo

Advisory: tux.org
Researcher: mancha
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-4143 (🔍)
X-Force: 86101
Vulnerability Center: 41283 - xlockmore 5.42 and Earlier Local Denial of Service due to a Flaw in glibc\x27s crypt() Function, Low
SecurityFocus: 61331 - xlockmore CVE-2013-4143 NULL Pointer Dereference Local Denial of Service Vulnerability

Entryinfo

Created: 03/25/2015 16:45
Updated: 03/22/2022 09:05
Changes: 03/25/2015 16:45 (66), 05/09/2017 23:22 (6), 03/22/2022 09:05 (3)
Complete: 🔍

Discussion

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