RHEL 5 : kvm (RHSA-2012:0149)

Medium Nessus Plugin ID 64028

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

Updated kvm packages that fix one security issue and several bugs are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for the standard Red Hat Enterprise Linux kernel.

It was found that the kvm_vm_ioctl_assign_device() function in the KVM subsystem of a Linux kernel did not check if the user requesting device assignment was privileged or not. A member of the kvm group on the host could assign unused PCI devices, or even devices that were in use and whose resources were not properly claimed by the respective drivers, which could result in the host crashing. (CVE-2011-4347)

Red Hat would like to thank Sasha Levin for reporting this issue.

These updated kvm packages include several bug fixes. Space precludes documenting all of these changes in this advisory. Users are directed to the Red Hat Enterprise Linux 5.8 Technical Notes, linked to in the References, for information on the most significant of these changes.

All KVM users should upgrade to these updated packages, which contain backported patches to correct these issues. Note: The procedure in the Solution section must be performed before this update will take effect.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?056c0c27

https://access.redhat.com/errata/RHSA-2012:0149

https://access.redhat.com/security/cve/cve-2011-4347

Plugin Details

Severity: Medium

ID: 64028

File Name: redhat-RHSA-2012-0149.nasl

Version: 1.20

Type: local

Agent: unix

Published: 2013/01/24

Updated: 2020/04/15

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 4

Temporal Score: 3

Vector: CVSS2#AV:L/AC:H/Au:N/C:N/I:N/A:C

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:kmod-kvm, p-cpe:/a:redhat:enterprise_linux:kmod-kvm-debug, p-cpe:/a:redhat:enterprise_linux:kvm, p-cpe:/a:redhat:enterprise_linux:kvm-debuginfo, p-cpe:/a:redhat:enterprise_linux:kvm-qemu-img, p-cpe:/a:redhat:enterprise_linux:kvm-tools, cpe:/o:redhat:enterprise_linux:5

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2012/02/21

Vulnerability Publication Date: 2013/06/08

Reference Information

CVE: CVE-2011-4347

BID: 50811

RHSA: 2012:0149