CVE-2023-30541
OpenZeppelin Contracts TransparentUpgradeableProxy clashing selector calls may not be delegated
Description
### Impact A function in the implementation contract may be inaccessible if its selector clashes with one of the proxy's own selectors. Specifically, if the clashing function has a different signature with incompatible ABI encoding, the proxy could revert while attempting to decode the arguments from calldata. The probability of an accidental clash is negligible, but one could be caused deliberately. ### Patches The issue has been fixed in v4.8.3. ### Workarounds If a function appears to be inaccessible for this reason, it may be possible to craft the calldata such that ABI decoding does not fail at the proxy and the function is properly proxied through. ### References https://github.com/OpenZeppelin/openzeppelin-contracts/pull/4154
How to fix CVE-2023-30541
To remediate CVE-2023-30541, upgrade the affected package to a fixed version below.
- —upgrade to 4.8.3 or later
- —upgrade to 4.8.3 or later
Is CVE-2023-30541 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- >= 3.2.0, < 4.8.3
- >= 3.2.0, < 4.8.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |