Two vulnerabilities have been discovered in VirtualBox, a x86
virtualisation solution, which might result in denial of service.
For the stable distribution (wheezy), these problems have been fixed in
version 4.1.18-dfsg-2+deb7u4.
For the unstable distribution (sid), these problems have been fixed in
version 4.3.18-dfsg-2.
We recommend that you upgrade your virtualbox packages.