ArchLinux: 201411-6: kdebase-workspace: local privilege escalation
Summary
KDE workspace configuration module for setting the date and time has a helper program which runs as root for performing actions. This is secured with polkit. This helper takes the name of the ntp utility to run as an argument. This allows a hacker to run any arbitrary command as root under the guise of updating the time.
Resolution
Upgrade to 4.11.13-2.
# pacman -Syu "kdebase-workspace>=4.11.13-2"
The problem has not been fixed upstream yet.
References
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-8651 https://seclists.org/oss-sec/2014/q4/520 https://bugs.archlinux.org/task/42679
Workaround
A polkit rule can be added to disable the org.kde.kcontrol.kcmclock.save action.