RHEL 5 : kvm (RHSA-2017:0454)

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 kvm is now available for Red Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having a security
impact of Important. 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.

KVM (for Kernel-based Virtual Machine) is a full virtualization
solution for Linux on x86 hardware. Using KVM, one can run multiple
virtual machines running unmodified Linux or Windows images. Each
virtual machine has private virtualized hardware: a network card,
disk, graphics adapter, etc.

Security Fix(es) :

* Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA emulator
support is vulnerable to an out-of-bounds access issue. It could occur
while copying VGA data via bitblt copy in backward mode. A privileged
user inside a guest could use this flaw to crash the QEMU process
resulting in DoS or potentially execute arbitrary code on the host
with privileges of QEMU process on the host. (CVE-2017-2615)

* Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA Emulator
support is vulnerable to an out-of-bounds access issue. The issue
could occur while copying VGA data in cirrus_bitblt_cputovideo. A
privileged user inside guest could use this flaw to crash the QEMU
process OR potentially execute arbitrary code on host with privileges
of the QEMU process. (CVE-2017-2620)

Red Hat would like to thank Wjjzhang (Tencent.com Inc.) and Li Qiang
(360.cn Inc.) for reporting CVE-2017-2615.

See also :

https://www.redhat.com/security/data/cve/CVE-2017-2615.html
https://www.redhat.com/security/data/cve/CVE-2017-2620.html
http://rhn.redhat.com/errata/RHSA-2017-0454.html

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 4.9
(CVSS2#AV:A/AC:M/Au:S/C:P/I:P/A:P)
CVSS Temporal Score : 4.4
(CVSS2#E:POC/RL:U/RC:ND)
Public Exploit Available : true

Family: Red Hat Local Security Checks

Nessus Plugin ID: 97594 ()

Bugtraq ID:

CVE ID: CVE-2017-2615
CVE-2017-2620

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