Vulnerability CVE-2013-4394
Published: 2013-10-28   Modified: 2013-10-29

Description:
The SetX11Keyboard function in systemd, when PolicyKit Local Authority (PKLA) is used to change the group permissions on the X Keyboard Extension (XKB) layouts description, allows local users in the group to modify the Xorg X11 Server configuration file and possibly gain privileges via vectors involving "special and control characters."

CVSS2 => (AV:L/AC:H/Au:N/C:C/I:C/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5.9/10
9.5/10
1.9/10
Exploit range
Attack complexity
Authentication
Local
High
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Partial
Affected software
Ubuntu developers -> Systemd 

 References:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=725357
http://www.debian.org/security/2013/dsa-2777
http://www.openwall.com/lists/oss-security/2013/10/01/9
https://bugzilla.redhat.com/show_bug.cgi?id=862324
https://security.gentoo.org/glsa/201612-34
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