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Red Hat 7: RHSA-2015:1772-01 Critical: Qemu-KVM-RHEV Buffer Issue

red hat
Calendar Grey September 14, 2015
Dist Redhat Esm H88
Crucial patch released for qemu-kvm-rhev addresses heap corruption vulnerability in Red Hat OpenStack Environment.
Updated qemu-kvm-rhev packages that fix one security issue are now available for Red Hat Enterprise Linux OpenStack Platform 5.0, 6.0 and 7.0, for Red Hat Enterprise Linux 7

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

Summary

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 issue was found in the QEMU emulator's VNC display driver. It could occur while refreshing the VNC server's display surface using the vnc_refresh_server_surface() routine. A privileged guest user could use this flaw to corrupt the heap memory and crash the QEMU process instance, or to potentially use it to execute arbitrary code on the host. (CVE-2015-5225)
Red Hat would like to thank Mr Qinghao Tang from QIHU 360 Inc. and Mr Zuozhi from Alibaba Inc. for reporting this issue.
All qemu-kvm-rhev users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing this update, shut down all running virtual machines. After all virtual machines have shut down, start them again for this update to take effect.

Topics%20covered

Topics Covered

security advisory Red Hat critical heap corruption buffer issue OpenStack qemu-kvm-rhev

References

https://access.redhat.com/security/cve/CVE-2015-5225 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux OpenStack Platform 5.0 for RHEL 7:
Source: qemu-kvm-rhev-2.1.2-23.el7_1.9.src.rpm
x86_64: libcacard-devel-rhev-2.1.2-23.el7_1.9.x86_64.rpm libcacard-rhev-2.1.2-23.el7_1.9.x86_64.rpm libcacard-tools-rhev-2.1.2-23.el7_1.9.x86_64.rpm qemu-img-rhev-2.1.2-23.el7_1.9.x86_64.rpm qemu-kvm-common-rhev-2.1.2-23.el7_1.9.x86_64.rpm qemu-kvm-rhev-2.1.2-23.el7_1.9.x86_64.rpm qemu-kvm-rhev-debuginfo-2.1.2-23.el7_1.9.x86_64.rpm qemu-kvm-tools-rhev-2.1.2-23.el7_1.9.x86_64.rpm
Red Hat Enterprise Linux OpenStack Platform 6.0 for RHEL 7:
Source: qemu-kvm-rhev-2.1.2-23.el7_1.9.src.rpm
x86_64: libcacard-devel-rhev-2.1.2-23.el7_1.9.x86_64.rpm libcacard-rhev-2.1.2-23.el7_1.9.x86_64.rpm libcacard-tools-rhev-2.1.2-23.el7_1.9.x86_64.rpm qemu-img-rhev-2.1.2-23.el7_1.9.x86_64.rpm qemu-kvm-common-rhev-2.1.2-23.el7_1.9.x86_64.rpm qemu-kvm-rhev-2.1.2-23.el7_1.9.x86_64.rpm qemu-kvm-rhev-debuginfo-2.1.2-23.el7_1.9.x86_64.rpm qemu-kvm-tools-rhev-2.1.2-23.el7_1.9.x86_64.rpm
Red Hat Enterprise Linux OpenStack Platform 7.0 for RHEL 7:
Source: qemu-kvm-rhev-2.1.2-23.el7_1.9.src.rpm
x86_64: libcacard-rhev-2.1.2-23.el7_1.9.x86_64.rpm libcacard-tools-rhev-2.1.2-23.el7_1.9.x86_64.rpm qemu-img-rhev-2.1.2-23.el7_1.9.x86_64.rpm qemu-kvm-common-rhev-2.1.2-23.el7_1.9.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2015:1772-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL: https://access.redhat.com/errata/RHSA-2015:1772.html
Issue date: 2015-09-14

Topic

Updated qemu-kvm-rhev packages that fix one security issue are nowavailable for Red Hat Enterprise Linux OpenStack Platform 5.0, 6.0 and 7.0,for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having Important securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.

Topics%20covered

Topics Covered

security advisory Red Hat critical heap corruption buffer issue OpenStack qemu-kvm-rhev

Relevant Releases Architectures

Red Hat Enterprise Linux OpenStack Platform 5.0 for RHEL 7 - x86_64

Red Hat Enterprise Linux OpenStack Platform 6.0 for RHEL 7 - x86_64

Red Hat Enterprise Linux OpenStack Platform 7.0 for RHEL 7 - x86_64

Bugs Fixed

1255896 - CVE-2015-5225 Qemu: ui: vnc: heap memory corruption in vnc_refresh_server_surface

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