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GHSA-f6rc-24x4-ppxp
No affected components available
Two issues were found: For some inputs to signed integer division, the circuit allowed two outputs, only one of which was valid. Additionally, the result of division by zero was underconstrained.
This vulnerability was identified using the Picus tool from Veridise.
Impacted on-chain verifiers have already been disabled via the estop mechanism outlined in the Verifier Management Design.
Mitigation
We recommend all impacted users upgrade as soon as possible.
Rust applications using the risc0-zkvm crate at versions < 2.2 should upgrade to version 2.2.0 or later.
Smart contract applications using the official RISC Zero Verifier Router do not need to take any action: zkVM version 2.2 is active on all official routers, and version 2.1 has been disabled.
Smart contract applications not using the verifier router should update their contracts to send verification calls to the 2.2 version of the verifier.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.
Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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