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Red Hat Product Errata RHSA-2017:0454 - Security Advisory
Issued:
2017-03-07
Updated:
2017-03-07

RHSA-2017:0454 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Important: 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

An update for kvm is now available for Red Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having a security impact of
Important. A Common Vulnerability Scoring System (CVSS) base score, which gives
a detailed severity rating, is available for each vulnerability from the CVE
link(s) in the References section.

Description

KVM (for Kernel-based Virtual Machine) is a full virtualization solution for
Linux on x86 hardware. Using KVM, one can run multiple virtual machines running
unmodified Linux or Windows images. Each virtual machine has private virtualized
hardware: a network card, disk, graphics adapter, etc.

Security Fix(es):

  • Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA emulator support is

vulnerable to an out-of-bounds access issue. It could occur while copying VGA
data via bitblt copy in backward mode. A privileged user inside a guest could
use this flaw to crash the QEMU process resulting in DoS or potentially execute
arbitrary code on the host with privileges of QEMU process on the host.
(CVE-2017-2615)

  • Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA Emulator support is

vulnerable to an out-of-bounds access issue. The issue could occur while copying
VGA data in cirrus_bitblt_cputovideo. A privileged user inside guest could use
this flaw to crash the QEMU process OR potentially execute arbitrary code on
host with privileges of the QEMU process. (CVE-2017-2620)

Red Hat would like to thank Wjjzhang (Tencent.com Inc.) and Li Qiang (360.cn
Inc.) for reporting CVE-2017-2615.

Solution

For details on how to apply this update, which includes the changes described in
this advisory, refer to:

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

Note: The procedure in the Solution section must be performed before this update
will take effect.

Affected Products

  • Red Hat Enterprise Linux Server 5 x86_64
  • Red Hat Enterprise Linux Workstation 5 x86_64

Fixes

  • BZ - 1418200 - CVE-2017-2615 Qemu: display: cirrus: oob access while doing bitblt copy backward mode
  • BZ - 1420484 - CVE-2017-2620 Qemu: display: cirrus: potential arbitrary code execution via cirrus_bitblt_cputovideo

CVEs

  • CVE-2017-2615
  • CVE-2017-2620

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 5

SRPM
kvm-83-277.el5_11.src.rpm SHA-256: 293a16161c1b096f2f7af7eac62fe99fe5c384cfd43e0e796301da419d11351b
x86_64
kmod-kvm-83-277.el5_11.x86_64.rpm SHA-256: 7ebbfc580d852597e6ef9c0aa6cdebc09fb4c65ad4f9c427fd5f0c47ac52ae68
kmod-kvm-debug-83-277.el5_11.x86_64.rpm SHA-256: caa3be438fd076b56d2152564e6fbe655410985246410cdc1d08ef952ea462b9
kvm-83-277.el5_11.x86_64.rpm SHA-256: c2689edaa494af92e582d269976a3aec8153e7a4221276ee5aa121fd9aff006d
kvm-debuginfo-83-277.el5_11.x86_64.rpm SHA-256: 65ba4fc5fde5be1396f21e58af93ecb0b039a6ead907b41cfa66496e8bc42115
kvm-qemu-img-83-277.el5_11.x86_64.rpm SHA-256: 72f5d27cfe06aeec6e0e36e06016697cdd522b2bcea48b7901ce31141e82b3b4
kvm-tools-83-277.el5_11.x86_64.rpm SHA-256: 8504d28a318d860811a8bea6f831d6e87a2c1edb66033b38b4b6558c4547d6e2

Red Hat Enterprise Linux Workstation 5

SRPM
kvm-83-277.el5_11.src.rpm SHA-256: 293a16161c1b096f2f7af7eac62fe99fe5c384cfd43e0e796301da419d11351b
x86_64
kmod-kvm-83-277.el5_11.x86_64.rpm SHA-256: 7ebbfc580d852597e6ef9c0aa6cdebc09fb4c65ad4f9c427fd5f0c47ac52ae68
kmod-kvm-debug-83-277.el5_11.x86_64.rpm SHA-256: caa3be438fd076b56d2152564e6fbe655410985246410cdc1d08ef952ea462b9
kvm-83-277.el5_11.x86_64.rpm SHA-256: c2689edaa494af92e582d269976a3aec8153e7a4221276ee5aa121fd9aff006d
kvm-debuginfo-83-277.el5_11.x86_64.rpm SHA-256: 65ba4fc5fde5be1396f21e58af93ecb0b039a6ead907b41cfa66496e8bc42115
kvm-qemu-img-83-277.el5_11.x86_64.rpm SHA-256: 72f5d27cfe06aeec6e0e36e06016697cdd522b2bcea48b7901ce31141e82b3b4
kvm-tools-83-277.el5_11.x86_64.rpm SHA-256: 8504d28a318d860811a8bea6f831d6e87a2c1edb66033b38b4b6558c4547d6e2

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

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