FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

xen-tools -- Unrestricted qemu logging

Affected packages
xen-tools < 4.7.0_2

Details

VuXML ID e800cd4b-4212-11e6-942d-bc5ff45d0f28
Discovery 2016-05-23
Entry 2016-07-04

The Xen Project reports:

When the libxl toolstack launches qemu for HVM guests, it pipes the output of stderr to a file in /var/log/xen. This output is not rate-limited in any way. The guest can easily cause qemu to print messages to stderr, causing this file to become arbitrarily large.

The disk containing the logfile can be exausted, possibly causing a denial-of-service (DoS).

References

CVE Name CVE-2014-3672
URL http://xenbits.xen.org/xsa/advisory-180.html