Executive Summary

Summary
Titlekvm security update
Informations
NameRHSA-2010:0898First vendor Publication2010-12-06
VendorRedHatLast vendor Modification2010-12-06
Severity (Vendor) ModerateRevision01

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:S/C:N/I:N/A:C)
Cvss Base Score4.6Attack RangeLocal
Cvss Impact Score6.9Attack ComplexityLow
Cvss Expoit Score3.1AuthenticationRequires single instance
Calculate full CVSS 2.0 Vectors scores

Detail

Problem Description:

Updated kvm packages that fix one security issue 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.

2. Relevant releases/architectures:

RHEL Desktop Multi OS (v. 5 client) - x86_64 RHEL Virtualization (v. 5 server) - x86_64

3. Description:

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.

A flaw was found in the way QEMU-KVM handled the reloading of fs and gs segment registers when they had invalid selectors. A privileged host user with access to "/dev/kvm" could use this flaw to crash the host (denial of service). (CVE-2010-3698)

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

4. Solution:

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

The following procedure must be performed before this update will take effect:

1) Stop all KVM guest virtual machines.

2) Either reboot the hypervisor machine or, as the root user, remove (using "modprobe -r [module]") and reload (using "modprobe [module]") all of the following modules which are currently running (determined using "lsmod"): kvm, ksm, kvm-intel or kvm-amd.

3) Restart the KVM guest virtual machines.

5. Bugs fixed (http://bugzilla.redhat.com/):

639879 - CVE-2010-3698 kvm: invalid selector in fs/gs causes kernel panic

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2010-0898.html

CWE : Common Weakness Enumeration

idName
CWE-399Resource Management Errors

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:22364
 
Oval ID: oval:org.mitre.oval:def:22364
Title: RHSA-2010:0898: kvm security update (Moderate)
Description: The KVM implementation in the Linux kernel before 2.6.36 does not properly reload the FS and GS segment registers, which allows host OS users to cause a denial of service (host OS crash) via a KVM_RUN ioctl call in conjunction with a modified Local Descriptor Table (LDT).
Family: unix Class: patch
Reference(s): RHSA-2010:0898-01
CESA-2010:0898
CVE-2010-3698
Version: 4
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
Product(s): kvm
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:23193
 
Oval ID: oval:org.mitre.oval:def:23193
Title: ELSA-2010:0898: kvm security update (Moderate)
Description: The KVM implementation in the Linux kernel before 2.6.36 does not properly reload the FS and GS segment registers, which allows host OS users to cause a denial of service (host OS crash) via a KVM_RUN ioctl call in conjunction with a modified Local Descriptor Table (LDT).
Family: unix Class: patch
Reference(s): ELSA-2010:0898-01
CVE-2010-3698
Version: 6
Platform(s): Oracle Linux 5
Product(s): kvm
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Os437

OpenVAS Exploits

DateDescription
2011-12-02Name : Fedora Update for kernel FEDORA-2011-16346
File : nvt/gb_fedora_2011_16346_kernel_fc14.nasl
2011-11-08Name : Fedora Update for kernel FEDORA-2011-15241
File : nvt/gb_fedora_2011_15241_kernel_fc14.nasl
2011-10-31Name : Fedora Update for kernel FEDORA-2011-14747
File : nvt/gb_fedora_2011_14747_kernel_fc14.nasl
2011-10-10Name : Fedora Update for kernel FEDORA-2011-12874
File : nvt/gb_fedora_2011_12874_kernel_fc14.nasl
2011-08-27Name : Fedora Update for kernel FEDORA-2011-11103
File : nvt/gb_fedora_2011_11103_kernel_fc14.nasl
2011-08-12Name : Ubuntu Update for linux-lts-backport-maverick USN-1187-1
File : nvt/gb_ubuntu_USN_1187_1.nasl
2011-08-09Name : CentOS Update for kvm-83-164.el5_ CESA-2010:0898 centos5 i386
File : nvt/gb_CESA-2010_0898_kvm-83-164.el5__centos5_i386.nasl
2011-06-24Name : Fedora Update for kernel FEDORA-2011-6447
File : nvt/gb_fedora_2011_6447_kernel_fc13.nasl
2011-06-20Name : Fedora Update for kernel FEDORA-2011-7551
File : nvt/gb_fedora_2011_7551_kernel_fc14.nasl
2011-05-17Name : Fedora Update for kernel FEDORA-2011-6541
File : nvt/gb_fedora_2011_6541_kernel_fc14.nasl
2011-03-15Name : Fedora Update for kernel FEDORA-2011-2134
File : nvt/gb_fedora_2011_2134_kernel_fc13.nasl
2011-03-07Name : Ubuntu Update for linux vulnerabilities USN-1081-1
File : nvt/gb_ubuntu_USN_1081_1.nasl
2011-02-28Name : Ubuntu Update for linux vulnerabilities USN-1072-1
File : nvt/gb_ubuntu_USN_1072_1.nasl
2011-02-28Name : Ubuntu Update for linux, linux-ec2 vulnerabilities USN-1073-1
File : nvt/gb_ubuntu_USN_1073_1.nasl
2011-02-18Name : Mandriva Update for kernel MDVSA-2011:029 (kernel)
File : nvt/gb_mandriva_MDVSA_2011_029.nasl
2011-02-11Name : Fedora Update for kernel FEDORA-2011-1138
File : nvt/gb_fedora_2011_1138_kernel_fc14.nasl
2010-12-28Name : Fedora Update for kernel FEDORA-2010-18983
File : nvt/gb_fedora_2010_18983_kernel_fc13.nasl
2010-12-09Name : Fedora Update for kernel FEDORA-2010-18493
File : nvt/gb_fedora_2010_18493_kernel_fc14.nasl
2010-12-02Name : Fedora Update for kernel FEDORA-2010-16826
File : nvt/gb_fedora_2010_16826_kernel_fc14.nasl

Open Source Vulnerability Database (OSVDB)

idDescription
68872Linux Kernel i915 KVM Host Register Loading KVM_RUN IOCTL Local DoS

Nessus® Vulnerability Scanner

DateDescription
2013-07-12Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2010-0898.nasl - Type : ACT_GATHER_INFO
2013-07-12Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2010-2011.nasl - Type : ACT_GATHER_INFO
2013-03-08Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1093-1.nasl - Type : ACT_GATHER_INFO
2013-01-24Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2010-0898.nasl - Type : ACT_GATHER_INFO
2012-08-01Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20101110_kernel_on_SL6_x.nasl - Type : ACT_GATHER_INFO
2012-08-01Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20101206_kvm_on_SL5_x.nasl - Type : ACT_GATHER_INFO
2011-08-09Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1187-1.nasl - Type : ACT_GATHER_INFO
2011-03-02Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1081-1.nasl - Type : ACT_GATHER_INFO
2011-03-01Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1072-1.nasl - Type : ACT_GATHER_INFO
2011-03-01Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1073-1.nasl - Type : ACT_GATHER_INFO
2011-01-11Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1041-1.nasl - Type : ACT_GATHER_INFO
2010-12-26Name : The remote Fedora host is missing a security update.
File : fedora_2010-18983.nasl - Type : ACT_GATHER_INFO
2010-12-14Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2010-0898.nasl - Type : ACT_GATHER_INFO
2010-11-18Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2010-0842.nasl - Type : ACT_GATHER_INFO
2010-10-29Name : The remote Fedora host is missing a security update.
File : fedora_2010-16826.nasl - Type : ACT_GATHER_INFO

Alert History

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0
DateInformations
2014-02-17 11:54:06
  • Multiple Updates