Security Advisory Important: qemu-kvm-rhev security update

Advisory: RHSA-2015:1001-1
Type: Security Advisory
Severity: Important
Issued on: 2015-05-13
Last updated on: 2015-05-13
Affected Products: Red Hat Enterprise Virtualization 3
CVEs (cve.mitre.org): CVE-2015-3456

Details

Updated qemu-kvm-rhev packages that fix one security issue are now
available for Red Hat Enterprise Virtualization 3.5.

Red Hat Product Security 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.

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

An out-of-bounds memory access flaw was found in the way QEMU's virtual
Floppy Disk Controller (FDC) handled FIFO buffer access while processing
certain FDC commands. A privileged guest user could use this flaw to crash
the guest or, potentially, execute arbitrary code on the host with the
privileges of the host's QEMU process corresponding to the guest.
(CVE-2015-3456)

Red Hat would like to thank Jason Geffner of CrowdStrike for reporting
this issue.

All qemu-kvm-rhev users are advised to upgrade to these updated packages,
which contain a backported patch to correct 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.

For details on how to apply this update, refer to:

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

Updated packages

Red Hat Enterprise Virtualization 3

SRPMS:
qemu-kvm-rhev-0.12.1.2-2.448.el6_6.3.src.rpm
File outdated by:  RHSA-2017:0351
    MD5: 80a284a571896f4e86a6010fbe76dccb
SHA-256: f9e2902e54449eb45c22ba40d96aaebdc8a3afdd450822dc78746c530e26a448
 
x86_64:
qemu-img-rhev-0.12.1.2-2.448.el6_6.3.x86_64.rpm
File outdated by:  RHSA-2017:0351
    MD5: 7f4d83930ab0b1c2594cad866df3e4b8
SHA-256: 12d9e43a56bc5f7fb521c4fbb27db7baebec40722668a0bf0ddcb8f52abf361d
qemu-kvm-rhev-0.12.1.2-2.448.el6_6.3.x86_64.rpm
File outdated by:  RHSA-2017:0351
    MD5: 7cfd5dd82c2b00157bb2c8948fe15fe7
SHA-256: 6ce433a9a23ceab85247fb364eb133fff07e7bc60013c9f9509280b1d12b8e86
qemu-kvm-rhev-debuginfo-0.12.1.2-2.448.el6_6.3.x86_64.rpm
File outdated by:  RHSA-2017:0351
    MD5: 3d9f1e0755dd551d3ed10cbffd26fb55
SHA-256: 208da9dd95903f659f7506bcce7c805eda6e61f912a397b5379cbee824b21db8
qemu-kvm-rhev-tools-0.12.1.2-2.448.el6_6.3.x86_64.rpm
File outdated by:  RHSA-2017:0351
    MD5: 087ac1652ebe0a2d58f05f9bdbce3638
SHA-256: 599b3df22916cfa61df5868c8d09120ef49055f70c1da07f361848e598a3b33a
 
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

1218611 - CVE-2015-3456 qemu: fdc: out-of-bounds fifo buffer memory access


References



These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:
https://www.redhat.com/security/team/key/#package

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