A vulnerability in KAuth and KDELibs allows local users to gain root privileges.

Announced

2017-06-27

Revised

2017-06-27

Access

local

Bugs

#618108

Advisory

https://security.gentoo.org/glsa/201706-29

Affected packages

Package	Arch	Vulnerable	Unaffected
kde-frameworks/kauth	*	< 5.29.0-r1	>= 5.29.0-r1
kde-frameworks/kdelibs	*	< 4.14.32	>= 4.14.32

Background

KAuth provides a convenient, system-integrated way to offload actions that need to be performed as a privileged user (root, for example) to small (hopefully secure) helper utilities.

The KDE libraries, basis of KDE and used by many open source projects.

Description

KAuth and KDELibs contains a logic flaw in which the service invoking D-Bus is not properly checked. This allows spoofing the identity of the caller and with some carefully crafted calls can lead to gaining root from an unprivileged account.

Impact

A local attacker could spoof the identity of the caller invoking D-Bus, possibly resulting in gaining privileges.

Workaround

There is no known workaround at this time.

Resolution

All KAuth users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=kde-frameworks/kauth-5.29.0-r1"

All KDELibs users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=kde-frameworks/kdelibs-4.14.32"

References

• CVE-2017-8422