Google is dedicated to enhancing the safety of open-source applied sciences, particularly people who make up the muse for a lot of of our merchandise, like Linux and KVM. To this finish we’re excited to announce the launch of kvmCTF, a vulnerability reward program (VRP) for the Kernel-based Digital Machine (KVM) hypervisor first introduced in October 2023.
KVM is a strong hypervisor with over 15 years of open-source improvement and is extensively used all through the buyer and enterprise panorama, together with platforms equivalent to Android and Google Cloud. Google is an energetic contributor to the venture and we designed kvmCTF as a collaborative approach to assist establish & remediate vulnerabilities and additional harden this basic safety boundary.
Just like kernelCTF, kvmCTF is a vulnerability reward program designed to assist establish and deal with vulnerabilities within the Kernel-based Digital Machine (KVM) hypervisor. It provides a lab surroundings the place individuals can log in and make the most of their exploits to acquire flags. Considerably, in kvmCTF the main focus is on zero day vulnerabilities and because of this, we is not going to be rewarding exploits that use n-days vulnerabilities. Particulars concerning the zero day vulnerability will likely be shared with Google after an upstream patch is launched to make sure that Google obtains them similtaneously the remainder of the open-source group. Moreover, kvmCTF makes use of the Google Naked Steel Resolution (BMS) surroundings to host its infrastructure. Lastly, given how essential a hypervisor is to total system safety, kvmCTF will reward varied ranges of vulnerabilities as much as and together with code execution and VM escape.
The way it works
The surroundings consists of a naked metallic host working a single visitor VM. Individuals will be capable to reserve time slots to entry the visitor VM and try to carry out a guest-to-host assault. The purpose of the assault should be to take advantage of a zero day vulnerability within the KVM subsystem of the host kernel. If profitable, the attacker will acquire a flag that proves their accomplishment in exploiting the vulnerability. The severity of the assault will decide the reward quantity, which will likely be primarily based on the reward tier system defined beneath. All reviews will likely be totally evaluated on a case-by-case foundation.
The rewards tiers are the next:
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Full VM escape: $250,000
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Arbitrary reminiscence write: $100,000
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Arbitrary reminiscence learn: $50,000
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Relative reminiscence write: $50,000
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Denial of service: $20,000
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Relative reminiscence learn: $10,000
To facilitate the relative reminiscence write/learn tiers and partly the denial of service, kvmCTF provides the choice of utilizing a number with KASAN enabled. In that case, triggering a KASAN violation will permit the participant to acquire a flag as proof.
The way to take part
To start, begin by studying the guidelines of this system. There one can find data on the right way to reserve a time slot, hook up with the visitor and acquire the flags, the mapping of the assorted KASAN violations with the reward tiers and directions on the right way to report a vulnerability, ship us your submission, or contact us on Discord.
