CVE-2023-30541 TransparentUpgradeableProxy clashing selector calls may not be delegated in @openzeppelin/contracts

2023-04-1721:37:29

CWE-436

GitHub_M

www.cve.org

openzeppelin contracts

smart contract development

selector clash

abi encoding

availability reduction

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

0.001 Low

EPSS

Percentile

39.4%

JSON

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.

CNA Affected

[
  {
    "vendor": "OpenZeppelin",
    "product": "openzeppelin-contracts",
    "versions": [
      {
        "version": "@openzeppelin/contracts: >= 3.2.0, < 4.8.3",
        "status": "affected"
      },
      {
        "version": "@openzeppelin/contracts-upgradeable:  >=3.2.0, <4.8.3",
        "status": "affected"
      }
    ]
  }
]