Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | xorg-server | 2:1.11.3.901-2 | — |
| Debian 13 | xorg-server | 2:1.11.3.901-2 | — |
| Debian 12 | xorg-server | 2:1.11.3.901-2 | — |
References
- http://gu1.aeroxteam.fr/2012/01/19/bypass-screensaver-locker-program-xorg-111-and-up/
- http://who-t.blogspot.com/2012/01/xkb-breaking-grabs-cve-2012-0064.html
- [xorg-devel] 20120119 [PATCH SECURITY] XKB: Workaround for CVE-2012-0064: Stop calling UngrabAllDevices(). mailing-list
- 1026549 vdb-entry
- 78445 vdb-entry
- [xorg-announce] 20120119 xkeyboard-config 2.5 mailing-list
- http://www.x.org/wiki/Development/Security/
- [oss-security] 20120118 Re: Screen locking programs on Xorg 1.11 mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=783039