OpenZeppelin Contracts for Cairo is vulnerable to signature validation bypass
CVE-2023-23940

6.4MEDIUM

Key Information:

Vendor

Openzeppelin

Status
Cairo-contracts
Vendor
CVE Published:
3 February 2023

What is 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.

Affected Version(s)

cairo-contracts >= 0.2.0, < 0.6.1

References

https://github.com/OpenZeppelin/cairo-contracts/security/...
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https://github.com/OpenZeppelin/cairo-contracts/pull/542/...
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CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
High
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.