(Red Hat Issues Fix for KVM) QEMU Buffer Overflow in ne2000_receive() Lets Local Guest Users Deny Service or Execute Arbitrary Code on the Host System
SecurityTracker Alert ID: 1033956|
SecurityTracker URL: http://securitytracker.com/id/1033956
(Links to External Site)
Date: Oct 24 2015
Denial of service via network, User access via local system|
Fix Available: Yes Vendor Confirmed: Yes |
A vulnerability was reported in QEMU. A local user on the guest system can cause denial of service conditions on the host system or potentially execute arbitrary code on the host system. KVM is affected.|
A local privileged user on the guest system can trigger a buffer overflow in the ne2000_receive() function and cause the target QEMU instance to crash or potentially execute arbitrary code on the host system.
Systems built with the NE2000 NIC emulation support are affected.
A local user on the guest system can cause denial of service conditions on the host system or potentially execute arbitrary code on the host system.|
Red Hat has issued a fix for KVM.|
The Red Hat advisory is available at:
Vendor URL: rhn.redhat.com/errata/RHSA-2015-1925.html (Links to External Site)
Access control error|
|Underlying OS: Linux (Red Hat Enterprise)|
This archive entry is a follow-up to the message listed below.|
Source Message Contents
Subject: [RHSA-2015:1925-01] Important: kvm security update|
-----BEGIN PGP SIGNED MESSAGE-----
Red Hat Security Advisory
Synopsis: Important: kvm security update
Advisory ID: RHSA-2015:1925-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-1925.html
Issue date: 2015-10-22
CVE Names: CVE-2015-5279
Updated kvm packages that fix one security issue are now available for Red
Hat Enterprise Linux 5.
Red Hat Product Security has rated this update as having Important security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
2. Relevant releases/architectures:
RHEL Desktop Multi OS (v. 5 client) - x86_64
RHEL Virtualization (v. 5 server) - x86_64
KVM (Kernel-based Virtual Machine) is a full virtualization solution for
Linux on AMD64 and Intel 64 systems.
A heap buffer overflow flaw was found in the way QEMU's NE2000 NIC
emulation implementation handled certain packets received over the network.
A privileged user inside a guest could use this flaw to crash the QEMU
instance (denial of service) or potentially execute arbitrary code on
the host. (CVE-2015-5279)
Red Hat would like to thank Qinghao Tang of QIHU 360 Inc. for reporting
All kvm users are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue. Note: The procedure in
the Solution section must be performed before this update will take effect.
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
For details on how to apply this update, refer to:
The following procedure must be performed before this update will take
1) Stop all KVM guest virtual machines.
2) Either reboot the hypervisor machine or, as the root user, remove (using
"modprobe -r [module]") and reload (using "modprobe [module]") all of the
following modules which are currently running (determined using "lsmod"):
kvm, ksm, kvm-intel or kvm-amd.
3) Restart the KVM guest virtual machines.
5. Bugs fixed (https://bugzilla.redhat.com/):
1256672 - CVE-2015-5279 qemu: Heap overflow vulnerability in ne2000_receive() function
6. Package List:
RHEL Desktop Multi OS (v. 5 client):
RHEL Virtualization (v. 5 server):
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <firstname.lastname@example.org>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2015 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
-----END PGP SIGNATURE-----
RHSA-announce mailing list