Executive Summary

Summary
Title qemu-kvm security update
Informations
Name RHSA-2012:1234 First vendor Publication 2012-09-05
Vendor RedHat Last vendor Modification 2012-09-05
Severity (Vendor) Important Revision 01

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score 7.2 Attack Range Local
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Problem Description:

Updated qemu-kvm packages that fix one security issue are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having important 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:

Red Hat Enterprise Linux Desktop (v. 6) - x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - x86_64 Red Hat Enterprise Linux Server (v. 6) - x86_64 Red Hat Enterprise Linux Workstation (v. 6) - x86_64

3. Description:

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. qemu-kvm is the user-space component for running virtual machines using KVM.

A flaw was found in the way QEMU handled VT100 terminal escape sequences when emulating certain character devices. A guest user with privileges to write to a character device that is emulated on the host using a virtual console back-end could use this flaw to crash the qemu-kvm process on the host or, possibly, escalate their privileges on the host. (CVE-2012-3515)

This flaw did not affect the default use of KVM. Affected configurations were:

* When guests were started from the command line ("/usr/libexec/qemu-kvm") without the "-nodefaults" option, and also without specifying a serial or parallel device, or a virtio-console device, that specifically does not use a virtual console (vc) back-end. (Note that Red Hat does not support invoking "qemu-kvm" from the command line without "-nodefaults" on Red Hat Enterprise Linux 6.)

* Guests that were managed via libvirt, such as when using Virtual Machine Manager (virt-manager), but that have a serial or parallel device, or a virtio-console device, that uses a virtual console back-end. By default, guests managed via libvirt will not use a virtual console back-end for such devices.

Red Hat would like to thank the Xen project for reporting this issue.

All users of qemu-kvm should upgrade to these updated packages, which resolve this issue. 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.

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 https://access.redhat.com/knowledge/articles/11258

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

851252 - CVE-2012-3515 qemu: VT100 emulation vulnerability

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2012-1234.html

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-20 Improper Input Validation

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:18182
 
Oval ID: oval:org.mitre.oval:def:18182
Title: USN-1590-1 -- qemu-kvm vulnerability
Description: QEMU could be made to crash or run programs.
Family: unix Class: patch
Reference(s): USN-1590-1
CVE-2012-3515
Version: 7
Platform(s): Ubuntu 12.04
Ubuntu 11.10
Ubuntu 11.04
Ubuntu 10.04
Product(s): qemu-kvm
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:18326
 
Oval ID: oval:org.mitre.oval:def:18326
Title: DSA-2542-1 qemu-kvm - multiple
Description: Multiple vulnerabilities have been discovered in KVM, a full virtualization solution on x86 hardware.
Family: unix Class: patch
Reference(s): DSA-2542-1
CVE-2012-2652
CVE-2012-3515
Version: 7
Platform(s): Debian GNU/Linux 6.0
Debian GNU/kFreeBSD 6.0
Product(s): qemu-kvm
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:19980
 
Oval ID: oval:org.mitre.oval:def:19980
Title: DSA-2545-1 qemu - multiple
Description: Multiple vulnerabilities have been discovered in QEMU, a fast processor emulator.
Family: unix Class: patch
Reference(s): DSA-2545-1
CVE-2012-2652
CVE-2012-3515
Version: 5
Platform(s): Debian GNU/Linux 6.0
Debian GNU/kFreeBSD 6.0
Product(s): qemu
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:21145
 
Oval ID: oval:org.mitre.oval:def:21145
Title: RHSA-2012:1236: xen security update (Important)
Description: Qemu, as used in Xen 4.0, 4.1 and possibly other products, when emulating certain devices with a virtual console backend, allows local OS guest users to gain privileges via a crafted escape VT100 sequence that triggers the overwrite of a "device model's address space."
Family: unix Class: patch
Reference(s): RHSA-2012:1236-00
CESA-2012:1236
CVE-2012-3515
Version: 4
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
Product(s): xen
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:21464
 
Oval ID: oval:org.mitre.oval:def:21464
Title: RHSA-2012:1235: kvm security update (Important)
Description: Qemu, as used in Xen 4.0, 4.1 and possibly other products, when emulating certain devices with a virtual console backend, allows local OS guest users to gain privileges via a crafted escape VT100 sequence that triggers the overwrite of a "device model's address space."
Family: unix Class: patch
Reference(s): RHSA-2012:1235-00
CESA-2012:1235
CVE-2012-3515
Version: 4
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
Product(s): kvm
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:21575
 
Oval ID: oval:org.mitre.oval:def:21575
Title: RHSA-2012:1234: qemu-kvm security update (Important)
Description: Qemu, as used in Xen 4.0, 4.1 and possibly other products, when emulating certain devices with a virtual console backend, allows local OS guest users to gain privileges via a crafted escape VT100 sequence that triggers the overwrite of a "device model's address space."
Family: unix Class: patch
Reference(s): RHSA-2012:1234-01
CESA-2012:1234
CVE-2012-3515
Version: 4
Platform(s): Red Hat Enterprise Linux 6
CentOS Linux 6
Product(s): qemu-kvm
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:22862
 
Oval ID: oval:org.mitre.oval:def:22862
Title: ELSA-2012:1235: kvm security update (Important)
Description: Qemu, as used in Xen 4.0, 4.1 and possibly other products, when emulating certain devices with a virtual console backend, allows local OS guest users to gain privileges via a crafted escape VT100 sequence that triggers the overwrite of a "device model's address space."
Family: unix Class: patch
Reference(s): ELSA-2012:1235-00
CVE-2012-3515
Version: 6
Platform(s): Oracle Linux 5
Product(s): kvm
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:22996
 
Oval ID: oval:org.mitre.oval:def:22996
Title: ELSA-2012:1236: xen security update (Important)
Description: Qemu, as used in Xen 4.0, 4.1 and possibly other products, when emulating certain devices with a virtual console backend, allows local OS guest users to gain privileges via a crafted escape VT100 sequence that triggers the overwrite of a "device model's address space."
Family: unix Class: patch
Reference(s): ELSA-2012:1236-00
CVE-2012-3515
Version: 6
Platform(s): Oracle Linux 5
Product(s): xen
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:23955
 
Oval ID: oval:org.mitre.oval:def:23955
Title: ELSA-2012:1234: qemu-kvm security update (Important)
Description: Qemu, as used in Xen 4.0, 4.1 and possibly other products, when emulating certain devices with a virtual console backend, allows local OS guest users to gain privileges via a crafted escape VT100 sequence that triggers the overwrite of a "device model's address space."
Family: unix Class: patch
Reference(s): ELSA-2012:1234-01
CVE-2012-3515
Version: 6
Platform(s): Oracle Linux 6
Product(s): qemu-kvm
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:27565
 
Oval ID: oval:org.mitre.oval:def:27565
Title: DEPRECATED: ELSA-2012-1235 -- kvm security update (important)
Description: [83-249.0.1.el5_8.5] - Added kvm-add-oracle-workaround-for-libvirt-bug.patch - Added kvm-Introduce-oel-machine-type.patch [83-249.el5_8.5] - kvm-console-bounds-check-whenever-changing-the-cursor-du-58.patch [bz#851255] - CVE: CVE-2012-3515 - Resolves: bz#851255 (EMBARGOED CVE-2012-3515 qemu/kvm: VT100 emulation vulnerability [rhel-5.8.z])
Family: unix Class: patch
Reference(s): ELSA-2012-1235
CVE-2012-3515
Version: 4
Platform(s): Oracle Linux 5
Product(s): kvm
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:27721
 
Oval ID: oval:org.mitre.oval:def:27721
Title: DEPRECATED: ELSA-2012-1234 -- qemu-kvm security update (important)
Description: [0.12.1.2-2.295.el6_3.2] - kvm-console-bounds-check-whenever-changing-the-cursor-du.patch [bz#851257 - Resolves: bz#851257 (EMBARGOED CVE-2012-3515 qemu/kvm: VT100 emulation vulnerability [rhel-6.3.z])
Family: unix Class: patch
Reference(s): ELSA-2012-1234
CVE-2012-3515
Version: 4
Platform(s): Oracle Linux 6
Product(s): qemu-kvm
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:27797
 
Oval ID: oval:org.mitre.oval:def:27797
Title: DEPRECATED: ELSA-2012-1236 -- xen security update (important)
Description: [3.0.3-135.el5_8.5] - console: Prevent escape sequence length overflow (rhbz 851253)
Family: unix Class: patch
Reference(s): ELSA-2012-1236
CVE-2012-3515
Version: 4
Platform(s): Oracle Linux 5
Product(s): xen
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 87
Application 2
Os 4
Os 2
Os 3
Os 2
Os 1
Os 2
Os 2
Os 2
Os 6
Os 2
Os 2

OpenVAS Exploits

Date Description
2012-12-18 Name : Fedora Update for xen FEDORA-2012-19828
File : nvt/gb_fedora_2012_19828_xen_fc16.nasl
2012-12-14 Name : Fedora Update for xen FEDORA-2012-19717
File : nvt/gb_fedora_2012_19717_xen_fc17.nasl
2012-12-13 Name : SuSE Update for XEN openSUSE-SU-2012:1572-1 (XEN)
File : nvt/gb_suse_2012_1572_1.nasl
2012-12-13 Name : SuSE Update for Security openSUSE-SU-2012:1174-1 (Security)
File : nvt/gb_suse_2012_1174_1.nasl
2012-12-13 Name : SuSE Update for Security openSUSE-SU-2012:1172-1 (Security)
File : nvt/gb_suse_2012_1172_1.nasl
2012-12-13 Name : SuSE Update for qemu openSUSE-SU-2012:1170-1 (qemu)
File : nvt/gb_suse_2012_1170_1.nasl
2012-11-23 Name : Fedora Update for xen FEDORA-2012-18249
File : nvt/gb_fedora_2012_18249_xen_fc16.nasl
2012-11-23 Name : Fedora Update for xen FEDORA-2012-18242
File : nvt/gb_fedora_2012_18242_xen_fc17.nasl
2012-11-15 Name : Fedora Update for xen FEDORA-2012-17408
File : nvt/gb_fedora_2012_17408_xen_fc16.nasl
2012-11-15 Name : Fedora Update for xen FEDORA-2012-17204
File : nvt/gb_fedora_2012_17204_xen_fc17.nasl
2012-10-19 Name : Fedora Update for qemu FEDORA-2012-15606
File : nvt/gb_fedora_2012_15606_qemu_fc16.nasl
2012-10-16 Name : Fedora Update for qemu FEDORA-2012-15740
File : nvt/gb_fedora_2012_15740_qemu_fc17.nasl
2012-10-03 Name : Ubuntu Update for qemu-kvm USN-1590-1
File : nvt/gb_ubuntu_USN_1590_1.nasl
2012-09-22 Name : Fedora Update for xen FEDORA-2012-13443
File : nvt/gb_fedora_2012_13443_xen_fc16.nasl
2012-09-22 Name : Fedora Update for xen FEDORA-2012-13434
File : nvt/gb_fedora_2012_13434_xen_fc17.nasl
2012-09-15 Name : Debian Security Advisory DSA 2545-1 (qemu)
File : nvt/deb_2545_1.nasl
2012-09-15 Name : Debian Security Advisory DSA 2543-1 (xen-qemu-dm-4.0)
File : nvt/deb_2543_1.nasl
2012-09-15 Name : Debian Security Advisory DSA 2542-1 (qemu-kvm)
File : nvt/deb_2542_1.nasl
2012-09-07 Name : RedHat Update for xen RHSA-2012:1236-01
File : nvt/gb_RHSA-2012_1236-01_xen.nasl
2012-09-07 Name : RedHat Update for qemu-kvm RHSA-2012:1234-01
File : nvt/gb_RHSA-2012_1234-01_qemu-kvm.nasl
2012-09-07 Name : CentOS Update for xen CESA-2012:1236 centos5
File : nvt/gb_CESA-2012_1236_xen_centos5.nasl
2012-09-07 Name : CentOS Update for kmod-kvm CESA-2012:1235 centos5
File : nvt/gb_CESA-2012_1235_kmod-kvm_centos5.nasl
2012-09-07 Name : CentOS Update for qemu-guest-agent CESA-2012:1234 centos6
File : nvt/gb_CESA-2012_1234_qemu-guest-agent_centos6.nasl

Nessus® Vulnerability Scanner

Date Description
2016-04-07 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201604-03.nasl - Type : ACT_GATHER_INFO
2016-01-06 Name : The remote device is missing a vendor-supplied security patch.
File : f5_bigip_SOL13405416.nasl - Type : ACT_GATHER_INFO
2015-06-12 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2015-0068.nasl - Type : ACT_GATHER_INFO
2014-11-26 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2012-0048.nasl - Type : ACT_GATHER_INFO
2014-11-26 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2012-0046.nasl - Type : ACT_GATHER_INFO
2014-11-26 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2012-0040.nasl - Type : ACT_GATHER_INFO
2014-11-26 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2012-0039.nasl - Type : ACT_GATHER_INFO
2014-11-08 Name : The remote Red Hat host is missing a security update.
File : redhat-RHSA-2012-1325.nasl - Type : ACT_GATHER_INFO
2014-11-08 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2012-1262.nasl - Type : ACT_GATHER_INFO
2014-11-08 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2012-1233.nasl - Type : ACT_GATHER_INFO
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2012-591.nasl - Type : ACT_GATHER_INFO
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2012-596.nasl - Type : ACT_GATHER_INFO
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2012-597.nasl - Type : ACT_GATHER_INFO
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2012-598.nasl - Type : ACT_GATHER_INFO
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2012-599.nasl - Type : ACT_GATHER_INFO
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2012-811.nasl - Type : ACT_GATHER_INFO
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2012-812.nasl - Type : ACT_GATHER_INFO
2013-09-28 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201309-24.nasl - Type : ACT_GATHER_INFO
2013-07-12 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2012-1236.nasl - Type : ACT_GATHER_INFO
2013-07-12 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2012-1235.nasl - Type : ACT_GATHER_INFO
2013-07-12 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2012-1234.nasl - Type : ACT_GATHER_INFO
2013-04-20 Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2013-121.nasl - Type : ACT_GATHER_INFO
2013-01-25 Name : The remote SuSE 11 host is missing one or more security updates.
File : suse_11_xen-201209-120829.nasl - Type : ACT_GATHER_INFO
2013-01-25 Name : The remote SuSE 11 host is missing one or more security updates.
File : suse_11_xen-201209-120831.nasl - Type : ACT_GATHER_INFO
2013-01-25 Name : The remote SuSE 11 host is missing a security update.
File : suse_11_kvm-120831.nasl - Type : ACT_GATHER_INFO
2013-01-24 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2012-1234.nasl - Type : ACT_GATHER_INFO
2013-01-24 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2012-1235.nasl - Type : ACT_GATHER_INFO
2012-10-17 Name : The remote Fedora host is missing a security update.
File : fedora_2012-15606.nasl - Type : ACT_GATHER_INFO
2012-10-15 Name : The remote Fedora host is missing a security update.
File : fedora_2012-15740.nasl - Type : ACT_GATHER_INFO
2012-10-03 Name : The remote Ubuntu host is missing a security-related patch.
File : ubuntu_USN-1590-1.nasl - Type : ACT_GATHER_INFO
2012-09-18 Name : The remote Fedora host is missing a security update.
File : fedora_2012-13443.nasl - Type : ACT_GATHER_INFO
2012-09-10 Name : The remote SuSE 10 host is missing a security-related patch.
File : suse_xen-201209-8268.nasl - Type : ACT_GATHER_INFO
2012-09-10 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-2545.nasl - Type : ACT_GATHER_INFO
2012-09-10 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-2543.nasl - Type : ACT_GATHER_INFO
2012-09-10 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-2542.nasl - Type : ACT_GATHER_INFO
2012-09-07 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2012-1234.nasl - Type : ACT_GATHER_INFO
2012-09-06 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20120905_kvm_on_SL5_x.nasl - Type : ACT_GATHER_INFO
2012-09-06 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2012-1236.nasl - Type : ACT_GATHER_INFO
2012-09-06 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20120905_qemu_kvm_on_SL6_x.nasl - Type : ACT_GATHER_INFO
2012-09-06 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20120905_xen_on_SL5_x.nasl - Type : ACT_GATHER_INFO
2012-09-06 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2012-1236.nasl - Type : ACT_GATHER_INFO
2012-09-06 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2012-1235.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
2
Date Informations
2014-02-17 11:56:18
  • Multiple Updates
2012-11-26 21:19:51
  • Multiple Updates
2012-11-24 00:24:38
  • Multiple Updates