[RHSA-2017:0083-01] Low: qemu-kvm security and bug fix update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Low: qemu-kvm security and bug fix update

Advisory ID: RHSA-2017:0083-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0083.html

Issue date: 2017-01-17

CVE Names: CVE-2016-2857

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1. Summary:

 

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.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

 

3. Description:

 

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)

 

4. Solution:

 

For details on how to apply this update, which includes the changes

described in this advisory, refer to:

 

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

 

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.

 

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

 

1296567 - CVE-2016-2857 Qemu: net: out of bounds read in net_checksum_calculate()

 

6. Package List:

 

Red Hat Enterprise Linux Client (v. 7):

 

Source:

qemu-kvm-1.5.3-126.el7_3.3.src.rpm

 

x86_64:

qemu-img-1.5.3-126.el7_3.3.x86_64.rpm

qemu-kvm-1.5.3-126.el7_3.3.x86_64.rpm

qemu-kvm-common-1.5.3-126.el7_3.3.x86_64.rpm

qemu-kvm-debuginfo-1.5.3-126.el7_3.3.x86_64.rpm

qemu-kvm-tools-1.5.3-126.el7_3.3.x86_64.rpm

 

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

 

Source:

qemu-kvm-1.5.3-126.el7_3.3.src.rpm

 

x86_64:

qemu-img-1.5.3-126.el7_3.3.x86_64.rpm

qemu-kvm-1.5.3-126.el7_3.3.x86_64.rpm

qemu-kvm-common-1.5.3-126.el7_3.3.x86_64.rpm

qemu-kvm-debuginfo-1.5.3-126.el7_3.3.x86_64.rpm

qemu-kvm-tools-1.5.3-126.el7_3.3.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 7):

 

Source:

qemu-kvm-1.5.3-126.el7_3.3.src.rpm

 

ppc64:

qemu-img-1.5.3-126.el7_3.3.ppc64.rpm

qemu-kvm-debuginfo-1.5.3-126.el7_3.3.ppc64.rpm

 

ppc64le:

qemu-img-1.5.3-126.el7_3.3.ppc64le.rpm

qemu-kvm-debuginfo-1.5.3-126.el7_3.3.ppc64le.rpm

 

x86_64:

qemu-img-1.5.3-126.el7_3.3.x86_64.rpm

qemu-kvm-1.5.3-126.el7_3.3.x86_64.rpm

qemu-kvm-common-1.5.3-126.el7_3.3.x86_64.rpm

qemu-kvm-debuginfo-1.5.3-126.el7_3.3.x86_64.rpm

qemu-kvm-tools-1.5.3-126.el7_3.3.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 7):

 

Source:

qemu-kvm-1.5.3-126.el7_3.3.src.rpm

 

x86_64:

qemu-img-1.5.3-126.el7_3.3.x86_64.rpm

qemu-kvm-1.5.3-126.el7_3.3.x86_64.rpm

qemu-kvm-common-1.5.3-126.el7_3.3.x86_64.rpm

qemu-kvm-debuginfo-1.5.3-126.el7_3.3.x86_64.rpm

qemu-kvm-tools-1.5.3-126.el7_3.3.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-2016-2857

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

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

 

8. Contact:

 

The Red Hat security contact is . More contact

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

 

Copyright 2017 Red Hat, Inc.

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