Vulnerability in Openzeppelin Cairo-Contracts
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.
EPSS: 0.002 (12.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L.
Affected products
- Openzeppelin Cairo-contracts — versions >= 0.2.0, < 0.6.1
- Openzeppelin Contracts
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2023-23940?
- CVE-2023-23940 is a medium-severity vulnerability in Openzeppelin Cairo-Contracts, classified under Insufficient Verification of Data Authenticity. CVSS score: 6.4/10. Published 2023-02-03.
- How severe is CVE-2023-23940?
- Medium severity. CVSS v3 base score is 6.4 out of 10.