Debian Security Advisory

DLA-845-1 qemu -- LTS security update

Date Reported:
01 Mar 2017
Affected Packages:
qemu
Vulnerable:
Yes
Security database references:
In Mitre's CVE dictionary: CVE-2017-2615, CVE-2017-2620, CVE-2017-5898, CVE-2017-5973.
More information:

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