CVE Database

CVE-2013-4143

Impact: Moderate
Public: 2013-07-14
Bugzilla: 985540: CVE-2013-4143 xlockmore: NULL pointer dereference leads to crash and bypass of screen lock

Details

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2013-4143 from the MITRE CVE dictionary and NIST NVD.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score: 4.6
Base Metrics: AV:L/AC:L/Au:N/C:P/I:P/A:P
Access Vector: Local
Access Complexity: Low
Authentication: None
Confidentiality Impact: Partial
Integrity Impact: Partial
Availability Impact: Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat security errata

Platform Errata Release Date

External References

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For clarification or corrections please contact the Red Hat Security Response Team.