RHEL 7 : qemu-kvm (RHSA-2017:0083)

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

An update for qemu-kvm is now available for Red Hat Enterprise Linux
7.

Red Hat Product Security has rated this update as having a security
impact of Low. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

Kernel-based Virtual Machine (KVM) is a full virtualization solution
for Linux on AMD64 and Intel 64 systems. The qemu-kvm packages provide
the user-space component for running virtual machines using KVM.

Security Fix(es) :

* An out-of-bounds read-access flaw was found in the QEMU emulator
built with IP checksum routines. The flaw could occur when computing a
TCP/UDP packet's checksum, because a QEMU function used the packet's
payload length without checking against the data buffer's size. A user
inside a guest could use this flaw to crash the QEMU process (denial
of service). (CVE-2016-2857)

Red Hat would like to thank Ling Liu (Qihoo 360 Inc.) for reporting
this issue.

Bug Fix(es) :

* Previously, rebooting a guest virtual machine more than 128 times in
a short period of time caused the guest to shut down instead of
rebooting, because the virtqueue was not cleaned properly. This update
ensures that the virtqueue is cleaned more reliably, which prevents
the described problem from occurring. (BZ#1393484)

See also :

https://www.redhat.com/security/data/cve/CVE-2016-2857.html
http://rhn.redhat.com/errata/RHSA-2017-0083.html

Solution :

Update the affected packages.

Risk factor :

Low / CVSS Base Score : 2.1
(CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:P)
CVSS Temporal Score : 1.6
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Red Hat Local Security Checks

Nessus Plugin ID: 96592 ()

Bugtraq ID:

CVE ID: CVE-2016-2857

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