FreeBSD : qemu -- denial of service vulnerability in USB EHCI emulation support (60cb2055-b1b8-11e5-9728-002590263bf5)

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


Synopsis :

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

Description :

Prasad J Pandit, Red Hat Product Security Team, reports :

Qemu emulator built with the USB EHCI emulation support is vulnerable
to an infinite loop issue. It occurs during communication between host
controller interface(EHCI) and a respective device driver. These two
communicate via a isochronous transfer descriptor list(iTD) and an
infinite loop unfolds if there is a closed loop in this list.

A privileges user inside guest could use this flaw to consume
excessive CPU cycles & resources on the host.

See also :

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205814
http://www.openwall.com/lists/oss-security/2015/12/14/9
http://www.nessus.org/u?5a5253fb
http://www.nessus.org/u?96ed6be0
http://www.nessus.org/u?9e2f3c84

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 4.9
(CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C)

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 87694 ()

Bugtraq ID:

CVE ID: CVE-2015-8558

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