Cryptographic Issues Affecting openzeppelin-cairo-contracts package, versions [0.2.0,0.6.1)
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Test your applications- Snyk ID SNYK-PYTHON-OPENZEPPELINCAIROCONTRACTS-3310430
- published 3 Feb 2023
- disclosed 2 Feb 2023
- credit Unknown
Introduced: 2 Feb 2023
CVE-2023-23940 Open this link in a new tabHow to fix?
Upgrade openzeppelin-cairo-contracts to version 0.6.1 or higher.
Overview
openzeppelin-cairo-contracts is an A library for secure smart contract development written in Cairo for StarkNet
Affected versions of this package are vulnerable to Cryptographic Issues due to the is_valid_eth_signature function which is missing a call to finalize_keccak function after calling the verify_eth_signature function.
Impact
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.
Risk
In order to exploit this vulnerability, it is required to control a sequencer or prover since they're the ones executing the hints, being able to inject incorrect keccak results.