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Red Hat 7 RHSA-2017:0987-01 Important: qemu-kvm Heap Overflow

red hat
Calendar Grey April 18, 2017
Scroller Redhat
Essential patch for qemu-kvm security flaws on Red Hat Enterprise Linux 7 to bolster security and reliability.
An update for qemu-kvm is now available for Red Hat Enterprise Linux 7

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.

Summary

Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM.
Security Fix(es):
* A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support; the issue could occur when a VNC client attempted to update its display after a VGA operation is performed by a guest. A privileged user/process inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process. (CVE-2016-9603)

Topics%20covered

Topics Covered

security advisory Red Hat important heap overflow KVM qemu-kvm

References

https://access.redhat.com/security/cve/CVE-2016-9603 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: qemu-kvm-1.5.3-126.el7_3.6.src.rpm
x86_64: qemu-img-1.5.3-126.el7_3.6.x86_64.rpm qemu-kvm-1.5.3-126.el7_3.6.x86_64.rpm qemu-kvm-common-1.5.3-126.el7_3.6.x86_64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.6.x86_64.rpm qemu-kvm-tools-1.5.3-126.el7_3.6.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
Source: qemu-kvm-1.5.3-126.el7_3.6.src.rpm
x86_64: qemu-img-1.5.3-126.el7_3.6.x86_64.rpm qemu-kvm-1.5.3-126.el7_3.6.x86_64.rpm qemu-kvm-common-1.5.3-126.el7_3.6.x86_64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.6.x86_64.rpm qemu-kvm-tools-1.5.3-126.el7_3.6.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: qemu-kvm-1.5.3-126.el7_3.6.src.rpm
ppc64: qemu-img-1.5.3-126.el7_3.6.ppc64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.6.ppc64.rpm
ppc64le: qemu-img-1.5.3-126.el7_3.6.ppc64le.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.6.ppc64le.rpm
x86_64: qemu-img-1.5.3-126.el7_3.6.x86_64.rpm qemu-kvm-1.5.3-126.el7_3.6.x86_64.rpm qemu-kvm-common-1.5.3-126.el7_3.6.x86_64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.6.x86_64.rpm qemu-kvm-tools-1.5.3-126.el7_3.6.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source: qemu-kvm-1.5.3-126.el7_3.6.src.rpm
x86_64: qemu-img-1.5.3-126.el7_3.6.x86_64.rpm qemu-kvm-1.5.3-126.el7_3.6.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2017:0987-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:0987
Issue date: 2017-04-18

Topic

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 impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat important heap overflow KVM qemu-kvm

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

Bugs Fixed

1430056 - CVE-2016-9603 Qemu: cirrus: heap buffer overflow via vnc connection

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