An independent researcher who was disgruntled with traditional bug bounty methods took it upon himself to leak the details of an exploit in Oracle’s Virtual Box without first informing Oracle.

Sergey Zelenyuk discovered a flaw that would allow him to escape from the virtual environment of the guest machine to reach the Ring 3 privilege layer used for running code from most user programs with the least privileges.

The vulnerability exists in VirtualBox 5.2.20 and prior versions.

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