Debian Security Advisory

DSA-2971-1 dbus -- security update

Date Reported:
02 Jul 2014
Affected Packages:
dbus
Vulnerable:
Yes
Security database references:
In Mitre's CVE dictionary: CVE-2014-3477, CVE-2014-3532, CVE-2014-3533.
More information:

Several vulnerabilities have been discovered in dbus, an asynchronous inter-process communication system. The Common Vulnerabilities and Exposures project identifies the following problems:

  • CVE-2014-3477

    Alban Crequy at Collabora Ltd. discovered that dbus-daemon sends an AccessDenied error to the service instead of a client when the client is prohibited from accessing the service. A local attacker could use this flaw to cause a bus-activated service that is not currently running to attempt to start, and fail, denying other users access to this service.

  • CVE-2014-3532

    Alban Crequy at Collabora Ltd. discovered a bug in dbus-daemon's support for file descriptor passing. A malicious process could force system services or user applications to be disconnected from the D-Bus system by sending them a message containing a file descriptor, leading to a denial of service.

  • CVE-2014-3533

    Alban Crequy at Collabora Ltd. and Alejandro Martínez Suárez discovered that a malicious process could force services to be disconnected from the D-Bus system by causing dbus-daemon to attempt to forward invalid file descriptors to a victim process, leading to a denial of service.

For the stable distribution (wheezy), these problems have been fixed in version 1.6.8-1+deb7u3.

For the unstable distribution (sid), these problems have been fixed in version 1.8.6-1.

We recommend that you upgrade your dbus packages.