The AcquireDaemonLock function in ipcdUnix.cpp in Sun Innotek VirtualBox before 2.0.6 allows local users to overwrite arbitrary files via a symlink attack on a /tmp/.vbox-$USER-ipc/lock temporary file.
https://exchange.xforce.ibmcloud.com/vulnerabilities/46826
http://www.vupen.com/english/advisories/2008/3410
http://www.virtualbox.org/wiki/Changelog
http://www.securitytracker.com/id?1021384
http://www.securityfocus.com/bid/32444
http://www.mandriva.com/security/advisories?name=MDVSA-2009:011
http://sunsolve.sun.com/search/document.do?assetkey=1-26-247326-1
http://secunia.com/advisories/32851
http://lists.opensuse.org/opensuse-security-announce/2009-02/msg00002.html