FreeBSD : FreeBSD -- Local privilege escalation in IRET handler (0dfa5dde-600a-11e6-a6c3-14dae9d210b8)

This script is Copyright (C) 2016 Tenable Network Security, Inc.


Synopsis :

The remote FreeBSD host is missing one or more security-related
updates.

Description :

If the kernel-mode IRET instruction generates an #SS or #NP exception,
but the exception handler does not properly ensure that the right GS
register base for kernel is reloaded, the userland GS segment may be
used in the context of the kernel exception handler. Impact : By
causing an IRET with #SS or #NP exceptions, a local attacker can cause
the kernel to use an arbitrary GS base, which may allow escalated
privileges or panic the system.

See also :

http://www.nessus.org/u?8a15139f

Solution :

Update the affected packages.

Risk factor :

High

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 92895 ()

Bugtraq ID:

CVE ID: CVE-2015-5675

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