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Red Hat Product Errata RHSA-2012:1234 - Security Advisory
Issued:
2012-09-05
Updated:
2012-09-05

RHSA-2012:1234 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Important: qemu-kvm security update

Type/Severity

Security Advisory: Important

Red Hat Insights patch analysis

Identify and remediate systems affected by this advisory.

View affected systems

Topic

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.

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.

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

Affected Products

  • Red Hat Enterprise Linux Server 6 x86_64
  • Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.3 x86_64
  • Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
  • Red Hat Enterprise Linux Workstation 6 x86_64
  • Red Hat Enterprise Linux Desktop 6 x86_64
  • Red Hat Enterprise Linux for Scientific Computing 6 x86_64
  • Red Hat Enterprise Linux Server from RHUI 6 x86_64
  • Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.3 x86_64

Fixes

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

CVEs

  • CVE-2012-3515

References

  • https://access.redhat.com/security/updates/classification/#important
Note: More recent versions of these packages may be available. Click a package name for more details.

Red Hat Enterprise Linux Server 6

SRPM
qemu-kvm-0.12.1.2-2.295.el6_3.2.src.rpm SHA-256: bca8b67ad7c9a0db1441a672e6aead7384422770b223bcfec0371a6e9e73102b
x86_64
qemu-guest-agent-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 1e23a1060fbca0df3d9ad45f8bc2d497fd457d36058616a60e7e1e0966671a76
qemu-img-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 1bbd9f94d426d0edbf065fa5dcd8e13e41ff0005870e5f4d2f2f09f1a3969ef8
qemu-kvm-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 52368822335489e09fd2e6451c11564e30c13a133f57fc42c901c2b34ec03e0b
qemu-kvm-debuginfo-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 2eeb6dc6efe65db4ae36ff6eefee9ad50b9921b8b2799548f2af9a5b536f1012
qemu-kvm-tools-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: c06cc8f29a84eff8b7d380db04e08b2133ead7bf303527c006ee4482b520000c

Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.3

SRPM
qemu-kvm-0.12.1.2-2.295.el6_3.2.src.rpm SHA-256: bca8b67ad7c9a0db1441a672e6aead7384422770b223bcfec0371a6e9e73102b
x86_64
qemu-guest-agent-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 1e23a1060fbca0df3d9ad45f8bc2d497fd457d36058616a60e7e1e0966671a76
qemu-img-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 1bbd9f94d426d0edbf065fa5dcd8e13e41ff0005870e5f4d2f2f09f1a3969ef8
qemu-kvm-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 52368822335489e09fd2e6451c11564e30c13a133f57fc42c901c2b34ec03e0b
qemu-kvm-debuginfo-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 2eeb6dc6efe65db4ae36ff6eefee9ad50b9921b8b2799548f2af9a5b536f1012
qemu-kvm-tools-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: c06cc8f29a84eff8b7d380db04e08b2133ead7bf303527c006ee4482b520000c

Red Hat Enterprise Linux Desktop 6

SRPM
qemu-kvm-0.12.1.2-2.295.el6_3.2.src.rpm SHA-256: bca8b67ad7c9a0db1441a672e6aead7384422770b223bcfec0371a6e9e73102b
x86_64
qemu-guest-agent-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 1e23a1060fbca0df3d9ad45f8bc2d497fd457d36058616a60e7e1e0966671a76
qemu-img-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 1bbd9f94d426d0edbf065fa5dcd8e13e41ff0005870e5f4d2f2f09f1a3969ef8
qemu-kvm-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 52368822335489e09fd2e6451c11564e30c13a133f57fc42c901c2b34ec03e0b
qemu-kvm-debuginfo-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 2eeb6dc6efe65db4ae36ff6eefee9ad50b9921b8b2799548f2af9a5b536f1012
qemu-kvm-tools-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: c06cc8f29a84eff8b7d380db04e08b2133ead7bf303527c006ee4482b520000c

Red Hat Enterprise Linux for Scientific Computing 6

SRPM
qemu-kvm-0.12.1.2-2.295.el6_3.2.src.rpm SHA-256: bca8b67ad7c9a0db1441a672e6aead7384422770b223bcfec0371a6e9e73102b
x86_64
qemu-guest-agent-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 1e23a1060fbca0df3d9ad45f8bc2d497fd457d36058616a60e7e1e0966671a76
qemu-img-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 1bbd9f94d426d0edbf065fa5dcd8e13e41ff0005870e5f4d2f2f09f1a3969ef8
qemu-kvm-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 52368822335489e09fd2e6451c11564e30c13a133f57fc42c901c2b34ec03e0b
qemu-kvm-debuginfo-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 2eeb6dc6efe65db4ae36ff6eefee9ad50b9921b8b2799548f2af9a5b536f1012
qemu-kvm-tools-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: c06cc8f29a84eff8b7d380db04e08b2133ead7bf303527c006ee4482b520000c

Red Hat Enterprise Linux Server from RHUI 6

SRPM
qemu-kvm-0.12.1.2-2.295.el6_3.2.src.rpm SHA-256: bca8b67ad7c9a0db1441a672e6aead7384422770b223bcfec0371a6e9e73102b
x86_64
qemu-guest-agent-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 1e23a1060fbca0df3d9ad45f8bc2d497fd457d36058616a60e7e1e0966671a76
qemu-img-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 1bbd9f94d426d0edbf065fa5dcd8e13e41ff0005870e5f4d2f2f09f1a3969ef8
qemu-kvm-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 52368822335489e09fd2e6451c11564e30c13a133f57fc42c901c2b34ec03e0b
qemu-kvm-debuginfo-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 2eeb6dc6efe65db4ae36ff6eefee9ad50b9921b8b2799548f2af9a5b536f1012
qemu-kvm-tools-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: c06cc8f29a84eff8b7d380db04e08b2133ead7bf303527c006ee4482b520000c

Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.3

SRPM
qemu-kvm-0.12.1.2-2.295.el6_3.2.src.rpm SHA-256: bca8b67ad7c9a0db1441a672e6aead7384422770b223bcfec0371a6e9e73102b
x86_64
qemu-guest-agent-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 1e23a1060fbca0df3d9ad45f8bc2d497fd457d36058616a60e7e1e0966671a76
qemu-img-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 1bbd9f94d426d0edbf065fa5dcd8e13e41ff0005870e5f4d2f2f09f1a3969ef8
qemu-kvm-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 52368822335489e09fd2e6451c11564e30c13a133f57fc42c901c2b34ec03e0b
qemu-kvm-debuginfo-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 2eeb6dc6efe65db4ae36ff6eefee9ad50b9921b8b2799548f2af9a5b536f1012
qemu-kvm-tools-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: c06cc8f29a84eff8b7d380db04e08b2133ead7bf303527c006ee4482b520000c

Red Hat Enterprise Linux Server - Extended Life Cycle Support 6

SRPM
qemu-kvm-0.12.1.2-2.295.el6_3.2.src.rpm SHA-256: bca8b67ad7c9a0db1441a672e6aead7384422770b223bcfec0371a6e9e73102b
x86_64
qemu-guest-agent-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 1e23a1060fbca0df3d9ad45f8bc2d497fd457d36058616a60e7e1e0966671a76
qemu-img-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 1bbd9f94d426d0edbf065fa5dcd8e13e41ff0005870e5f4d2f2f09f1a3969ef8
qemu-kvm-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 52368822335489e09fd2e6451c11564e30c13a133f57fc42c901c2b34ec03e0b
qemu-kvm-debuginfo-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 2eeb6dc6efe65db4ae36ff6eefee9ad50b9921b8b2799548f2af9a5b536f1012
qemu-kvm-tools-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: c06cc8f29a84eff8b7d380db04e08b2133ead7bf303527c006ee4482b520000c

Red Hat Enterprise Linux Workstation 6

SRPM
qemu-kvm-0.12.1.2-2.295.el6_3.2.src.rpm SHA-256: bca8b67ad7c9a0db1441a672e6aead7384422770b223bcfec0371a6e9e73102b
x86_64
qemu-guest-agent-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 1e23a1060fbca0df3d9ad45f8bc2d497fd457d36058616a60e7e1e0966671a76
qemu-img-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 1bbd9f94d426d0edbf065fa5dcd8e13e41ff0005870e5f4d2f2f09f1a3969ef8
qemu-kvm-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 52368822335489e09fd2e6451c11564e30c13a133f57fc42c901c2b34ec03e0b
qemu-kvm-debuginfo-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: 2eeb6dc6efe65db4ae36ff6eefee9ad50b9921b8b2799548f2af9a5b536f1012
qemu-kvm-tools-0.12.1.2-2.295.el6_3.2.x86_64.rpm SHA-256: c06cc8f29a84eff8b7d380db04e08b2133ead7bf303527c006ee4482b520000c

The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.

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