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Scientific Linux Security Update : qemu-kvm on SL7.x x86_64 (20150727)
high Nessus Plugin ID 85072
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Synopsis
The remote Scientific Linux host is missing one or more security updates.Description
A heap buffer overflow flaw was found in the way QEMU's IDE subsystem handled I/O buffer access while processing certain ATAPI commands. A privileged guest user in a guest with the CDROM drive enabled could potentially use this flaw to execute arbitrary code on the host with the privileges of the host's QEMU process corresponding to the guest.(CVE-2015-5154)
An out-of-bounds memory access flaw, leading to memory corruption or possibly an information leak, was found in QEMU's pit_ioport_read() function. A privileged guest user in a QEMU guest, which had QEMU PIT emulation enabled, could potentially, in rare cases, use this flaw to execute arbitrary code on the host with the privileges of the hosting QEMU process. (CVE-2015-3214)
This update also fixes the following bug :
- Due to an incorrect implementation of portable memory barriers, the QEMU emulator in some cases terminated unexpectedly when a virtual disk was under heavy I/O load. This update fixes the implementation in order to achieve correct synchronization between QEMU's threads.
As a result, the described crash no longer occurs.
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
Plugin Details
Severity: High
ID: 85072
File Name: sl_20150727_qemu_kvm_on_SL7_x.nasl
Version: 2.5
Type: local
Agent: unix
Published: 7/29/2015
Updated: 1/14/2021
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.8
CVSS v2
Risk Factor: High
Base Score: 7.2
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
Vulnerability Information
CPE: p-cpe:/a:fermilab:scientific_linux:libcacard, p-cpe:/a:fermilab:scientific_linux:libcacard-devel, p-cpe:/a:fermilab:scientific_linux:libcacard-tools, p-cpe:/a:fermilab:scientific_linux:qemu-img, p-cpe:/a:fermilab:scientific_linux:qemu-kvm, p-cpe:/a:fermilab:scientific_linux:qemu-kvm-common, p-cpe:/a:fermilab:scientific_linux:qemu-kvm-debuginfo, p-cpe:/a:fermilab:scientific_linux:qemu-kvm-tools, x-cpe:/o:fermilab:scientific_linux
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list
Patch Publication Date: 7/27/2015
Vulnerability Publication Date: 8/12/2015
Reference Information
CVE: CVE-2015-3214, CVE-2015-5154