Parallels : Security Vulnerabilities, CVEs, Published In 2007 (Code Execution)

Heap-based buffer overflow in the VGA device in Parallels allows local users, with root access to the guest operating system, to terminate the virtual machine and possibly execute arbitrary code in the host operating system via unspecified vectors related to bitblt operations.

Parallels Desktop for Mac before 20070216 implements Drag and Drop by sharing the entire host filesystem as the .psf share, which allows local users of the guest operating system to write arbitrary files to the host filesystem, and execute arbitrary code via launchd by writing a plist file to a LaunchAgents directory.