Permissions, Privileges, and Access Controls in xscreensaver - CVE-2015-8025
Published: November 10, 2015 / Updated: July 28, 2020
Vulnerability identifier: #VU32377
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2015-8025
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: www.jwz.org
Affected software:
xscreensaver
xscreensaver
Detailed vulnerability description
The vulnerability allows a local non-authenticated attacker to manipulate data.
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.
How to mitigate CVE-2015-8025
Install update from vendor's website.
Sources
- http://lists.opensuse.org/opensuse-updates/2015-11/msg00102.html
- http://www.debian.org/security/2016/dsa-3438
- 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.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
- http://www.securitytracker.com/id/1034052
- http://www.ubuntu.com/usn/USN-2789-1
- https://twitter.com/Thaolia/status/656823859304398848
- https://www.jwz.org/blog/2015/10/xscreensaver-5-34/