Vulnerability identifier: #VU33126

Vulnerability risk: Low

CVSSv3.1: 5.2 [CVSS:3.1/CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2012-0064

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to read and manipulate data.

xkeyboard-config before 2.5 in X.Org before 7.6 enables certain XKB debugging functions by default, which allows physically proximate attackers to bypass an X screen lock via keyboard combinations that break the input grab.

Mitigation
Install update from vendor's website.

External links
http://gu1.aeroxteam.fr/2012/01/19/bypass-screensaver-locker-program-xorg-111-and-up/
http://lists.x.org/archives/xorg-announce/2012-January/001797.html
http://lists.x.org/archives/xorg-devel/2012-January/028691.html
http://securitytracker.com/id?1026549
http://who-t.blogspot.com/2012/01/xkb-breaking-grabs-cve-2012-0064.html
http://www.openwall.com/lists/oss-security/2012/01/19/6
http://www.osvdb.org/78445
http://www.x.org/wiki/Development/Security/
http://bugzilla.redhat.com/show_bug.cgi?id=783039

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.