Google is dedicated to enhancing the safety of open-source applied sciences, particularly people who make up the inspiration 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 broadly used all through the patron and enterprise panorama, together with platforms resembling Android and Google Cloud. Google is an energetic contributor to the undertaking and we designed kvmCTF as a collaborative method to assist establish & remediate vulnerabilities and additional harden this basic safety boundary.
Much like kernelCTF, kvmCTF is a vulnerability reward program designed to assist establish and handle vulnerabilities within the Kernel-based Digital Machine (KVM) hypervisor. It affords a lab atmosphere the place contributors 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 in consequence, we won’t be rewarding exploits that use n-days vulnerabilities. Particulars concerning the zero day vulnerability can 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 Metallic Resolution (BMS) atmosphere to host its infrastructure. Lastly, given how crucial a hypervisor is to total system safety, kvmCTF will reward numerous ranges of vulnerabilities as much as and together with code execution and VM escape.
The way it works
The atmosphere consists of a naked steel host working a single visitor VM. Contributors will have the ability to reserve time slots to entry the visitor VM and try to carry out a guest-to-host assault. The objective of the assault have to be to take advantage of a zero day vulnerability within the KVM subsystem of the host kernel. If profitable, the attacker will receive a flag that proves their accomplishment in exploiting the vulnerability. The severity of the assault will decide the reward quantity, which can be based mostly on the reward tier system defined beneath. All experiences can be completely 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 affords the choice of utilizing a bunch with KASAN enabled. In that case, triggering a KASAN violation will enable the participant to acquire a flag as proof.
Learn how to take part
To start, begin by studying the guidelines of this system. There you can see data on methods to reserve a time slot, connect with the visitor and acquire the flags, the mapping of the varied KASAN violations with the reward tiers and directions on methods to report a vulnerability, ship us your submission, or contact us on Discord.
