CVE-2023-23940

OpenZeppelin Contracts for Cairo is a library for secure smart contract development written in Cairo for StarkNet, a decentralized ZK Rollup. `is_valid_eth_signature` is missing a call to `finalize_keccak` after calling `verify_eth_signature`. As a result, any contract using `is_valid_eth_signature` from the account library (such as the `EthAccount` preset) is vulnerable to a malicious sequencer. Specifically, the malicious sequencer would be able to bypass signature validation to impersonate an instance of these accounts. The issue has been patched in 0.6.1.

Score

CVSS 3.1 6.4 Medium

Status

Modified - security-advisories@github.com

Published

2023-02-03

Last modified

2025-03-10

Weaknesses

CWE-345, CWE-347

Affected products

• Cairo-contracts (Openzeppelin)
• Contracts (Openzeppelin)

References

• https://github.com/OpenZeppelin/cairo-contracts/pull/542/commits/6d4cb750478fca2fd916f73297632f899aca9299
• https://github.com/OpenZeppelin/cairo-contracts/security/advisories/GHSA-626q-v9j4-mcp4