[RHSA-2015:2695-01] Important: qemu-kvm-rhev security update

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Red Hat Security Advisory

 

Synopsis: Important: qemu-kvm-rhev security update

Advisory ID: RHSA-2015:2695-01

Product: Red Hat Enterprise Linux OpenStack Platform

Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-2695.html

Issue date: 2015-12-22

CVE Names: CVE-2015-7504 CVE-2015-7512

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1. Summary:

 

Updated qemu-kvm-rhev packages that fix two security issues are now

available for Red Hat Enterprise Linux OpenStack Platform 5.0 for Red Hat

Enterprise Linux 6.

 

Red Hat Product Security has rated this update as having Important security

impact. Common Vulnerability Scoring System (CVSS) base scores, which give

detailed severity ratings, are available for each vulnerability from the

CVE links in the References section.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux OpenStack Platform 5.0 for RHEL 6 - x86_64

 

3. Description:

 

KVM (Kernel-based Virtual Machine) is a full virtualization solution for

Linux on AMD64 and Intel 64 systems. The qemu-kvm-rhev package provides the

user-space component for running virtual machines using KVM.

 

A heap-based buffer overflow flaw was discovered in the way QEMU's AMD

PC-Net II Ethernet Controller emulation received certain packets in

loopback mode. A privileged user (with the CAP_SYS_RAWIO capability) inside

a guest could use this flaw to crash the host QEMU process (resulting in

denial of service) or, potentially, execute arbitrary code with privileges

of the host QEMU process. (CVE-2015-7504)

 

A buffer overflow flaw was found in the way QEMU's AMD PC-Net II emulation

validated certain received packets from a remote host in non-loopback mode.

A remote, unprivileged attacker could potentially use this flaw to execute

arbitrary code on the host with the privileges of the QEMU process.

Note that to exploit this flaw, the guest network interface must have a

large MTU limit. (CVE-2015-7512)

 

Red Hat would like to thank Qinghao Tang of QIHU 360 Marvel Team and Ling

Liu of Qihoo 360 Inc. for reporting the CVE-2015-7504 issue, and Ling Liu

of Qihoo 360 Inc. for reporting the CVE-2015-7512 issue. The CVE-2015-7512

issue was independently discovered by Jason Wang of Red Hat.

 

All qemu-kvm-rhev users are advised to upgrade to these updated packages,

which contain backported patches to correct these issues. After installing

this update, shut down all running virtual machines. Once all virtual

machines have shut down, start them again for this update to take effect.

 

4. Solution:

 

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:

 

https://access.redhat.com/articles/11258

 

5. Bugs fixed (https://bugzilla.redhat.com/):

 

1261461 - CVE-2015-7504 Qemu: net: pcnet: heap overflow vulnerability in pcnet_receive

1285061 - CVE-2015-7512 Qemu: net: pcnet: buffer overflow in non-loopback mode

 

6. Package List:

 

Red Hat Enterprise Linux OpenStack Platform 5.0 for RHEL 6:

 

Source:

qemu-kvm-rhev-0.12.1.2-2.479.el6_7.3.src.rpm

 

x86_64:

qemu-img-rhev-0.12.1.2-2.479.el6_7.3.x86_64.rpm

qemu-kvm-rhev-0.12.1.2-2.479.el6_7.3.x86_64.rpm

qemu-kvm-rhev-debuginfo-0.12.1.2-2.479.el6_7.3.x86_64.rpm

qemu-kvm-rhev-tools-0.12.1.2-2.479.el6_7.3.x86_64.rpm

 

These packages are GPG signed by Red Hat for security. Our key and

details on how to verify the signature are available from

https://access.redhat.com/security/team/key/

 

7. References:

 

https://access.redhat.com/security/cve/CVE-2015-7504

https://access.redhat.com/security/cve/CVE-2015-7512

https://access.redhat.com/security/updates/classification/#important

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2015 Red Hat, Inc.

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