Debian LTS Advisory ([SECURITY] [DLA 842-1] qemu-kvm security update)

Published: 2018-01-07 23:00:00
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:S/C:C/I:C/A:C

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

Affected Versions:
qemu-kvm on Debian Linux

Recommendations:
For Debian 7 'Wheezy', these problems have been fixed in version 1.1.2+dfsg-6+deb7u20. We recommend that you upgrade your qemu-kvm Linux Distribution Packages.

Summary:
Several vulnerabilities were discovered in qemu-kvm, a full virtualization solution for Linux hosts on x86 hardware with x86 guests. CVE-2017-2615 The Cirrus CLGD 54xx VGA Emulator in qemu-kvm 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-kvm process on the host. CVE-2017-2620 The Cirrus CLGD 54xx VGA Emulator in qemu-kvm 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-kvm 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-kvm process on the host resulting in a DoS. This issue does not affect the qemu-kvm binaries in Debian but we apply the patch to the sources to stay in sync with the qemu Linux Distribution Package. CVE-2017-5973 The USB xHCI controller emulator support in qemu-kvm 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-kvm process resulting in a DoS. This update also updates the fix CVE-2016-9921 since it was too strict and broke certain guests.

Detection Method:
This check tests the installed software version using the apt Linux Distribution Package manager.

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2016-9921
https://nvd.nist.gov/vuln/detail/CVE-2017-2615
https://nvd.nist.gov/vuln/detail/CVE-2017-2620
https://nvd.nist.gov/vuln/detail/CVE-2017-5898
https://nvd.nist.gov/vuln/detail/CVE-2017-5973

References:

https://lists.debian.org/debian-lts-announce/2017/02/msg00033.html

Severity
High
CVSS Score
9.0
Published
2018-01-07
Modified
2019-03-18
Category
Debian Local Security Checks

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