FreeBSD : dbus -- multiple vulnerabilities (e6a7636a-02d0-11e4-88b6-080027671656)
Low Nessus Plugin ID 76364
SynopsisThe remote FreeBSD host is missing a security-related update.
DescriptionSimon McVittie reports :
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 bus by sending them a message containing a file descriptor, then causing that file descriptor to exceed the kernel's maximum recursion depth (itself introduced to fix a DoS) before dbus-daemon forwards the message to the victim process. Most services and applications exit when disconnected from the system bus, leading to a denial of service.
Additionally, Alban discovered that bug fd.o#79694, a bug previously reported by Alejandro Martinez Suarez which was n believed to be security flaw, could be used for a similar denial of service, by causing dbus-daemon to attempt to forward invalid file descriptors to a victim process when file descriptors become associated with the wrong message.
SolutionUpdate the affected package.