Executive Summary

Summary
Titleqemu-kvm security update
Informations
NameRHSA-2011:1777First vendor Publication2011-12-06
VendorRedHatLast vendor Modification2011-12-06
Severity (Vendor) ImportantRevision01

Security-Database Scoring CVSS v2

Cvss vector : (AV:A/AC:H/Au:N/C:C/I:C/A:C)
Cvss Base Score6.8Attack RangeAdjacent network
Cvss Impact Score10Attack ComplexityHigh
Cvss Expoit Score3.2AuthenticationNone 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-kvm handled VSC_ATR messages when a guest was configured for a CCID (Chip/Smart Card Interface Devices) USB smart card reader in passthrough mode. An attacker able to connect to the port on the host being used for such a device could use this flaw to crash the qemu-kvm process on the host or, possibly, escalate their privileges on the host. (CVE-2011-4111)

All users of qemu-kvm should upgrade to these updated packages, which contain a backported patch to 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/kb/docs/DOC-11259

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

751310 - CVE-2011-4111 qemu: ccid: buffer overflow in handling of VSC_ATR message

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2011-1777.html

CWE : Common Weakness Enumeration

idName
CWE-119Failure to Constrain Operations within the Bounds of a Memory Buffer

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:21985
 
Oval ID: oval:org.mitre.oval:def:21985
Title: RHSA-2011:1801: qemu-kvm security update (Important)
Description: Buffer overflow in the ccid_card_vscard_handle_message function in hw/ccid-card-passthru.c in QEMU before 0.15.2 and 1.x before 1.0-rc4 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted VSC_ATR message.
Family: unix Class: patch
Reference(s): RHSA-2011:1801-01
CESA-2011:1801
CVE-2011-4111
Version: 5
Platform(s): Red Hat Enterprise Linux 6
CentOS Linux 6
Product(s): qemu-kvm
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:21812
 
Oval ID: oval:org.mitre.oval:def:21812
Title: RHSA-2011:1777: qemu-kvm security update (Important)
Description: Buffer overflow in the ccid_card_vscard_handle_message function in hw/ccid-card-passthru.c in QEMU before 0.15.2 and 1.x before 1.0-rc4 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted VSC_ATR message.
Family: unix Class: patch
Reference(s): RHSA-2011:1777-01
CESA-2011:1777
CVE-2011-4111
Version: 5
Platform(s): Red Hat Enterprise Linux 6
CentOS Linux 6
Product(s): qemu-kvm
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:23594
 
Oval ID: oval:org.mitre.oval:def:23594
Title: ELSA-2011:1801: qemu-kvm security update (Important)
Description: Buffer overflow in the ccid_card_vscard_handle_message function in hw/ccid-card-passthru.c in QEMU before 0.15.2 and 1.x before 1.0-rc4 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted VSC_ATR message.
Family: unix Class: patch
Reference(s): ELSA-2011:1801-01
CVE-2011-4111
Version: 6
Platform(s): Oracle Linux 6
Product(s): qemu-kvm
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:23505
 
Oval ID: oval:org.mitre.oval:def:23505
Title: ELSA-2011:1777: qemu-kvm security update (Important)
Description: Buffer overflow in the ccid_card_vscard_handle_message function in hw/ccid-card-passthru.c in QEMU before 0.15.2 and 1.x before 1.0-rc4 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted VSC_ATR message.
Family: unix Class: patch
Reference(s): ELSA-2011:1777-01
CVE-2011-4111
Version: 6
Platform(s): Oracle Linux 6
Product(s): qemu-kvm
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application8
Os1
Os1

OpenVAS Exploits

DateDescription
2012-07-30Name : CentOS Update for qemu-img CESA-2011:1777 centos6
File : nvt/gb_CESA-2011_1777_qemu-img_centos6.nasl
2012-07-30Name : CentOS Update for qemu-img CESA-2011:1801 centos6
File : nvt/gb_CESA-2011_1801_qemu-img_centos6.nasl
2012-07-09Name : RedHat Update for qemu-kvm RHSA-2011:1777-01
File : nvt/gb_RHSA-2011_1777-01_qemu-kvm.nasl

Nessus® Vulnerability Scanner

DateDescription
2013-07-12Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2011-1777.nasl - Type : ACT_GATHER_INFO
2013-01-24Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2011-1777.nasl - Type : ACT_GATHER_INFO
2013-01-24Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2011-1801.nasl - Type : ACT_GATHER_INFO
2012-08-01Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20111206_qemu_kvm_on_SL6_x.nasl - Type : ACT_GATHER_INFO
2011-12-23Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2011-1777.nasl - Type : ACT_GATHER_INFO
2011-12-23Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2011-1801.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
2
DateInformations
2014-02-27 17:23:34
  • Multiple Updates
2014-02-26 21:25:27
  • Multiple Updates
2014-02-17 11:55:23
  • Multiple Updates