CVE-2023-23940
First published: Fri Feb 03 2023(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Openzeppelin Contracts | >=0.2.0<0.6.1 |
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Reference Links
Frequently Asked Questions
What is CVE-2023-23940?
CVE-2023-23940 is a vulnerability in OpenZeppelin Contracts for Cairo, a library for secure smart contract development.
What is the severity of CVE-2023-23940?
The severity of CVE-2023-23940 is medium, with a severity value of 5.3.
Which software is affected by CVE-2023-23940?
OpenZeppelin Contracts for Cairo versions 0.2.0 to 0.6.1 are affected by CVE-2023-23940.
What is the CWE ID for CVE-2023-23940?
The CWE ID for CVE-2023-23940 is 347 and 345.
How can I fix CVE-2023-23940?
To fix CVE-2023-23940, update OpenZeppelin Contracts for Cairo to a version that includes the fix.
- collector/nvd-index
- vendor/openzeppelin
- canonical/openzeppelin contracts
- version/openzeppelin contracts/0.2.0