Access Restriction Bypass The advisory has been revoked - it doesn't affect any version of package xscreensaver (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1604-XSCREENSAVER-624540
- published10 Nov 2015
- disclosed10 Nov 2015
Introduced: 10 Nov 2015
CVE-2015-8025 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:16.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream xscreensaver package and not the xscreensaver package as distributed by Ubuntu.
driver/subprocs.c in XScreenSaver before 5.34 does not properly perform an internal consistency check, which allows physically proximate attackers to bypass the lock screen by hot swapping monitors.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2015-8025
- http://www.debian.org/security/2016/dsa-3438
- https://security-tracker.debian.org/tracker/CVE-2015-8025
- https://twitter.com/Thaolia/status/656823859304398848
- https://www.jwz.org/blog/2015/10/xscreensaver-5-34/
- http://lists.opensuse.org/opensuse-updates/2015-11/msg00102.html
- http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
- http://www.openwall.com/lists/oss-security/2015/10/24/2
- http://www.openwall.com/lists/oss-security/2015/10/25/1
- http://www.openwall.com/lists/oss-security/2015/10/29/12
- http://www.securitytracker.com/id/1034052
- http://www.ubuntu.com/usn/USN-2789-1