OpenZeppelin Contracts's ERC2771Context with custom forwarder may lead to zero-valued _msgSender
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
@openzeppelin/contractsnpm | >= 4.0.0, < 4.9.3 | 4.9.3 |
@openzeppelin/contracts-upgradeablenpm | >= 4.0.0, < 4.9.3 | 4.9.3 |
Affected products
3- ghsa-coords2 versions
>= 4.0.0, < 4.9.3+ 1 more
- (no CPE)range: >= 4.0.0, < 4.9.3
- (no CPE)range: >= 4.0.0, < 4.9.3
- Range: >= 4.0.0, < 4.9.3
Patches
Vulnerability mechanics
References
9- github.com/advisories/GHSA-g4vp-m682-qqmpghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2023-40014ghsaADVISORY
- github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.3/CHANGELOG.mdghsaWEB
- github.com/OpenZeppelin/openzeppelin-contracts/commit/9445f96223041abf2bf08daa56f8da50b674cbcdghsax_refsource_MISCWEB
- github.com/OpenZeppelin/openzeppelin-contracts/commit/e4435eed757d4309436b1e06608e97b6d6e2fdb5ghsax_refsource_MISCWEB
- github.com/OpenZeppelin/openzeppelin-contracts/pull/4481ghsax_refsource_MISCWEB
- github.com/OpenZeppelin/openzeppelin-contracts/pull/4484ghsax_refsource_MISCWEB
- github.com/OpenZeppelin/openzeppelin-contracts/releases/tag/v4.9.3ghsax_refsource_MISCWEB
- github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-g4vp-m682-qqmpghsax_refsource_CONFIRMWEB
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