Highlights
Denial of Service: 6 prior fixes. Scrutinize any change in this area.
Configuration: most-fixed (2 issues). Treat as high-risk during review.
6 high-severity fixes in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
Signature Bypass: Inconsistent signature validation pathways allowed attackers to bypass client authorization checks. Consolidating signature verification under unified helper routines is critical for maintaining smart contract trust boundaries.
Denial of Service: Empty input strings to cryptographic operations like keccak caused unhandled panics, leading to immediate denial of service. Robust input length and sanity checks must be applied before triggering heavy cryptographic pipelines.
Broken Object Level Authorization: Insecure direct downloads of proof inputs from S3 allowed broader access than intended. Transitioning to dynamically assumed, prover-specific AWS IAM roles ensures strict object-level access control.