GLSA 201701-20: D-Bus: Format string vulnerability

http://security.gentoo.org/

Severity:	normal
Title:	D-Bus: Format string vulnerability
Date:	01/11/2017
Bugs:	#596772
ID:	201701-20

Synopsis

A vulnerability has been found in D-Bus possibly resulting in a local Denial of Service.

Background

D-Bus is a message bus system, a simple way for applications to talk to one another.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
sys-apps/dbus	< 1.10.12	>= 1.10.12	All supported architectures

Description

It was discovered that D-Bus incorrectly handles certain format strings.

The impact of this new vulnerability is believed to not be exploitable if D-Bus is patched against CVE-2015-0245. The previous vulnerability (CVE-2015-0245) was addressed in GLSA-201503-02 referenced below.

Impact

A local attacker could cause a Denial of Service condition or possibly execute arbitrary code.

Workaround

The vulnerable D-Bus interface is intended only for use by systemd running as root.

The administrator can install a policy which denies sending from org.freedesktop.systemd1.Activator” to D-Bus. This will prevent non-root attackers from reaching the interface in order to exercise this flaw.

Resolution

All D-Bus users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=sys-apps/dbus-1.10.12"

References

GLSA-201503-02

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201701-20.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.