FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

FreeBSD -- bhyve - privilege escalation vulnerability

Affected packages
11.0 <= FreeBSD-kernel < 11.0_2


VuXML ID a479a725-9adb-11e6-a298-14dae9d210b8
Discovery 2016-10-25
Entry 2016-10-25
Modified 2016-10-25

Problem Description:

An unchecked array reference in the VGA device emulation code could potentially allow guests access to the heap of the bhyve process. Since the bhyve process is running as root, this may allow guests to obtain full control of the hosts they are running on.


For bhyve virtual machines with the "fbuf" framebuffer device configured, if exploited, a malicious guest could obtain full access to not just the host system, but to other virtual machines running on the system.


FreeBSD Advisory SA-16:32.bhyve