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RHEL 6 : qemu-kvm (RHSA-2014:1075)
high Nessus Plugin ID 77271
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Synopsis
The remote Red Hat host is missing one or more security updates.Description
Updated qemu-kvm packages that fix two security issues and three bugs are now available for Red Hat Enterprise Linux 6.Red Hat Product Security has rated this update as having Moderate 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.
KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm package provides the user-space component for running virtual machines using KVM.
Two integer overflow flaws were found in the QEMU block driver for QCOW version 1 disk images. A user able to alter the QEMU disk image files loaded by a guest could use either of these flaws to corrupt QEMU process memory on the host, which could potentially result in arbitrary code execution on the host with the privileges of the QEMU process. (CVE-2014-0222, CVE-2014-0223)
Red Hat would like to thank NSA for reporting these issues.
This update also fixes the following bugs :
* In certain scenarios, when performing live incremental migration, the disk size could be expanded considerably due to the transfer of unallocated sectors past the end of the base image. With this update, the bdrv_is_allocated() function has been fixed to no longer return 'True' for unallocated sectors, and the disk size no longer changes after performing live incremental migration. (BZ#1109715)
* This update enables ioeventfd in virtio-scsi-pci. This allows QEMU to process I/O requests outside of the vCPU thread, reducing the latency of submitting requests and improving single task throughput.
(BZ#1123271)
* Prior to this update, vendor-specific SCSI commands issued from a KVM guest did not reach the target device due to QEMU considering such commands as invalid. This update fixes this bug by properly propagating vendor-specific SCSI commands to the target device.
(BZ#1125131)
All qemu-kvm 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.
Solution
Update the affected packages.See Also
https://access.redhat.com/errata/RHSA-2014:1075
Plugin Details
Severity: High
ID: 77271
File Name: redhat-RHSA-2014-1075.nasl
Version: 1.16
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 8/20/2014
Updated: 1/14/2021
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: High
Base Score: 7.5
Temporal Score: 5.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Vulnerability Information
CPE: p-cpe:/a:redhat:enterprise_linux:qemu-guest-agent, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:redhat:enterprise_linux:qemu-img, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-tools, p-cpe:/a:redhat:enterprise_linux:qemu-kvm, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-debuginfo, cpe:/o:redhat:enterprise_linux:6.5
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Ease: No known exploits are available
Patch Publication Date: 8/19/2014
Vulnerability Publication Date: 11/4/2014
Reference Information
CVE: CVE-2014-0222, CVE-2014-0223
RHSA: 2014:1075