scroll-tech / scroll-tech/ceno

review guest program error bypass application constrain `commit`

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Dominant language
Rust
Stars
153
Forks
43
Avg merge
3d 13h
Merged PRs (30d)
4

Description

Refer lambdaclass research https://blog.lambdaclass.com/responsible-disclosure-of-an-exploit-in-succincts-sp1-zkvm-found-in-partnership-with-3mi-labs-and-aligned-which-arises-from-the-interaction-of-two-distinct-security-vulnerabilities/

ceno::commit (from #881) are kind of application side constrain and only check when pc navigate through this call. However a malicious prover might be able to bypass the control flow by carefully early terminating the program e.g. panic thus the public io constrain was entirely skip. We need to review carefully on how sdk deal with error handling

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First steps

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  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the ceno::commit behavior introduced in #881 and read the linked LambdaClass disclosure for the early-termination scenario. Review the SDK's error-handling path, especially panic or other abnormal program exits, and determine how public I/O constraints are handled when control flow does not reach ceno::commit. Done means the review identifies and addresses any way a malicious prover can bypass those constraints.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
cryptography, security
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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