Scientific Linux alert SLSA-2017:0396-1 (qemu-kvm)

From:
    	     
 
Pat Riehecky <riehecky@fnal.gov> 
To:
    	     
 
<scientific-linux-errata@listserv.fnal.gov> 
Subject:
    	     
 
Security ERRATA Important: qemu-kvm on SL7.x x86_64 
Date:
    	     
 
Thu, 2 Mar 2017 19:30:15 +0000
Message-ID:
    	     
 
<20170302193015.3515.43153@slpackages.fnal.gov>
Synopsis:          Important: qemu-kvm security and bug fix update
Advisory ID:       SLSA-2017:0396-1
Issue Date:        2017-03-02
CVE Numbers:       CVE-2017-2615
                   CVE-2017-2620
--

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)

Bug Fix(es):

* When using the virtio-blk driver on a guest virtual machine with no
space on the virtual hard drive, the guest terminated unexpectedly with a
"block I/O error in device" message and the qemu-kvm process exited with a
segmentation fault. This update fixes how the system_reset QEMU signal is
handled in the above scenario. As a result, if a guest crashes due to no
space left on the device, qemu-kvm continues running and the guest can be
reset as expected.
--

SL7
  x86_64
    qemu-img-1.5.3-126.el7_3.5.x86_64.rpm
    qemu-kvm-1.5.3-126.el7_3.5.x86_64.rpm
    qemu-kvm-common-1.5.3-126.el7_3.5.x86_64.rpm
    qemu-kvm-debuginfo-1.5.3-126.el7_3.5.x86_64.rpm
    qemu-kvm-tools-1.5.3-126.el7_3.5.x86_64.rpm

- Scientific Linux Development Team