CVE-2015-2152 Information

Description

Xen 4.5.x and earlier enables certain default backends when emulating a VGA device for an x86 HVM guest qemu even when the configuration disables them which allows local guest users to obtain access to the VGA console by (1) setting the DISPLAY environment variable when compiled with SDL support or connecting to the VNC server on (2) ::1 or (3) 127.0.0.1 when not compiled with SDL support.

Reference

http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152483.html http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152588.html http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152776.html http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00014.html http://www.securityfocus.com/bid/73068 http://www.securitytracker.com/id/1031806 http://www.securitytracker.com/id/1031919 http://xenbits.xen.org/xsa/advisory-119.html https://security.gentoo.org/glsa/201504-04