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CVE-2013-4143

11
FAUCET Score

CVE-2013-4143 describes a bypass vulnerability in xlockmore versions prior to 5.43. Specifically, the checkPasswd and checkGroupXlockPasswds functions fail to correctly handle NULL return values from the crypt or dispcrypt functions (as implemented in glibc 2.17+), allowing attackers to bypass the screen lock through invalid salts. This vulnerability has a low severity CVSS score of 2.1, indicating local access with low attack complexity and a potential impact of partial availability loss. There is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.42CPE matchmatch criteria
cpe:2.3:a:david_bagley:xlockmore:*:*:*:*:*:*:*:*
5.24CPE matchmatch criteria
cpe:2.3:a:david_bagley:xlockmore:5.24:*:*:*:*:*:*:*
5.25CPE matchmatch criteria
cpe:2.3:a:david_bagley:xlockmore:5.25:*:*:*:*:*:*:*
5.26CPE matchmatch criteria
cpe:2.3:a:david_bagley:xlockmore:5.26:*:*:*:*:*:*:*
5.27CPE matchmatch criteria
cpe:2.3:a:david_bagley:xlockmore:5.27:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

2.1LOW

AV:L/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
32.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 54th percentile among its peer group of 2,096 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.6 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

openwall.com / lists/oss-security/2013/07/16/8
openwall.com / lists/oss-security/2013/07/18/6
tux.org / ~bagleyd/xlock/xlockmore.README
Vendor Advisory