[SECURITY] [DLA 845-1] qemu security update

[news 28]

Package : qemu

Version : 1.1.2+dfsg-6+deb7u20

CVE ID : CVE-2017-2615 CVE-2017-2620 CVE-2017-5898 CVE-2017-5973

Debian Bug :

 

Several vulnerabilities were discovered in qemu, a fast processor

emulator. The Common Vulnerabilities and Exposures project identifies

the following problems:

 

CVE-2017-2615

 

The Cirrus CLGD 54xx VGA Emulator in qemu 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 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-2017-2620

 

The Cirrus CLGD 54xx VGA Emulator in qemu is vulnerable to an

out-of-bounds access issue. It could occur while copying VGA data

in cirrus_bitblt_cputovideo.

 

A privileged user inside 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-2017-5898

 

The CCID Card device emulator support is vulnerable to an integer

overflow flaw. It could occur while passing message via

command/responses packets to and from the host.

 

A privileged user inside guest could use this flaw to crash the

Qemu process on host resulting in DoS.

 

CVE-2017-5973

 

The USB xHCI controller emulator support in qemu is vulnerable

to an infinite loop issue. It could occur while processing control

transfer descriptors' sequence in xhci_kick_epctx.

 

A privileged user inside guest could use this flaw to crash the

Qemu process resulting in DoS.

 

This update also updates the fix CVE-2016-9921 since it was too strict

and broke certain guests.

 

For Debian 7 "Wheezy", these problems have been fixed in version

1.1.2+dfsg-6+deb7u20.

 

We recommend that you upgrade your qemu packages.

 

Further information about Debian LTS security advisories, how to apply

these updates to your system and frequently asked questions can be

found at: https://wiki.debian.org/LTS