Google is dedicated to enhancing the safety of open-source applied sciences, particularly those 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 broadly used all through the buyer and enterprise panorama, together with platforms akin to Android and Google Cloud. Google is an energetic contributor to the venture and we designed kvmCTF as a collaborative manner to assist establish & remediate vulnerabilities and additional harden this elementary 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 presents a lab surroundings the place members 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 is not going to be rewarding exploits that use n-days vulnerabilities. Particulars relating to the zero day vulnerability will likely be shared with Google after an upstream patch is launched to make sure that Google obtains them concurrently the remainder of the open-source neighborhood. Moreover, kvmCTF makes use of the Google Naked Steel Answer (BMS) surroundings to host its infrastructure. Lastly, given how vital 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 operating a single visitor VM. Contributors will be capable to reserve time slots to entry the visitor VM and try to carry out a guest-to-host assault. The aim of the assault should be to use a zero day vulnerability within the KVM subsystem of the host kernel. If profitable, the attacker will get hold of 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 under. All experiences 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 presents 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.
The right way to take part
To start, begin by studying the guidelines of this system. There you will discover data on methods 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 methods to report a vulnerability, ship us your submission, or contact us on Discord.