Advisories ยป MGASA-2013-0169

Updated qemu packages fix security vulnerability

Publication date: 18 Jun 2013
Type: security
Affected Mageia releases : 2 , 3
CVE: CVE-2013-2007


It was found that QEMU Guest Agent (the "qemu-ga" service) created
certain files with world-writable permissions when run in daemon mode
(the default mode). An unprivileged guest user could use this flaw to
consume all free space on the partition containing the qemu-ga log file, or
modify the contents of the log. When a UNIX domain socket transport was
explicitly configured to be used (not the default), an unprivileged guest
user could potentially use this flaw to escalate their privileges in the
guest (CVE-2013-2007).

Note:  This update requires manual action. Refer below for details.

This update does not change the permissions of the existing log file or
the UNIX domain socket. For these to be changed, stop the qemu-ga service,
and then manually remove all "group" and "other" permissions on the
affected files, or remove the files.

Also note that after installing this update, files created by the
guest-file-open QEMU Monitor Protocol (QMP) command will still continue to
be created with world-writable permissions for backwards compatibility.