Vulnerability in Openzeppelin Contracts
CVE-2022-35961
OpenZeppelin Contracts is a library for secure smart contract development. The functions `ECDSA.recover` and `ECDSA.tryRecover` are vulnerable to a kind of signature malleability due to accepting EIP-2098 compact signatures in addition to the traditional 65 byte signature format. This is only an issue for the functions that take a single `bytes` argument, and not the functions that take `r, v, s` or `r, vs` as separate arguments. The potentially affected contracts are those that implement signature reuse or replay protection by marking the signature itself as used rather than the signed message or a nonce included in it. A user may take a signature that has already been submitted, submit it again in a different form, and bypass this protection. The issue has been patched in 4.7.3.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.9 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.004 (33.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Openzeppelin Contracts
- Openzeppelin Contracts Upgradeable
- Openzeppelin Openzeppelin-Contracts — versions >= 4.1.0, < 4.7.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-4h98-27… (Third Party Advisory)
- github.com/OpenZeppelin/openzeppelin-contracts/pull/3610 (Patch, Third Party Advisory)
- github.com/OpenZeppelin/openzeppelin-contracts/releases/tag/v4.7.3 (Third Party Advisory, Release Notes)
Frequently asked questions
- What is CVE-2022-35961?
- CVE-2022-35961 is a high-severity vulnerability in Openzeppelin Contracts, classified under Improper Validation of Integrity Check Value. CVSS score: 7.9/10. Published 2022-08-15.
- How severe is CVE-2022-35961?
- High severity. CVSS v3 base score is 7.9 out of 10.
- Is CVE-2022-35961 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.