CVE-2023-30541CWE-436

TransparentUpgradeableProxy clashing selector calls may not be delegated in @openzeppelin/contracts

Medium · published April 17, 2023

CVSS v3.1
5.3
EPSS
1%
Percentile
56.5
In the wild
Unconfirmed
What it is

OpenZeppelin Contracts is a library for secure smart contract development. 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 and could cause a reduction in availability. The issue has been fixed in version 4.8.3. As a workaround 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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00812 · 56.5th percentile
Weakness
CWE-436 · Interpretation Conflict
Published
2023-04-17T21:37Z
EPSS history
Timeline
  • 17 APR 21:37Z
    TransparentUpgradeableProxy clashing selector calls may not be delegated in @openzeppelin/contracts
    cvelistv5