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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.002 (11.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Openzeppelin Cairo-Contracts — versions >= 0.2.0, < 0.6.1
- Openzeppelin Contracts
Weakness classification (CWE)
References
- github.com/OpenZeppelin/cairo-contracts/security/advisories/GHSA-626q-v9j4-mcp4 (Third Party Advisory)
- github.com/OpenZeppelin/cairo-contracts/pull/542/commits/6d4cb750478fca2fd916f7… (Patch, Third Party Advisory)
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.