CVE-2023-40014CWE-116

OpenZeppelin Contracts's ERC2771Context with custom forwarder may lead to zero-valued _msgSender

Medium · published August 10, 2023

CVSS v3.1
5.3
EPSS
1%
Percentile
54.2
In the wild
Unconfirmed
What it is

OpenZeppelin Contracts is a library for secure smart contract development. Starting in version 4.0.0 and prior to version 4.9.3, contracts using `ERC2771Context` along with a custom trusted forwarder may see `_msgSender` return `address(0)` in calls that originate from the forwarder with calldata shorter than 20 bytes. This combination of circumstances does not appear to be common, in particular it is not the case for `MinimalForwarder` from OpenZeppelin Contracts, or any deployed forwarder the team is aware of, given that the signer address is appended to all calls that originate from these forwarders. The problem has been patched in v4.9.3.

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:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00743 · 54.2th percentile
Weakness
CWE-116 · Improper Encoding or Escaping of Output
Published
2023-08-10T19:52Z
EPSS history
Timeline
  • 10 AUG 19:52Z
    OpenZeppelin Contracts's ERC2771Context with custom forwarder may lead to zero-valued _msgSender
    cvelistv5