PT-2023-27209 · Openzeppelin · Openzeppelin Contracts

Frangiop · Published 2023-08-10 · Updated 2023-08-23 · CVE-2023-40014

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions OpenZeppelin Contracts versions 4.0.0 through 4.9.3

Description OpenZeppelin Contracts is a library for secure smart contract development. 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.

Recommendations For versions prior to 4.9.3, update to version 4.9.3 to resolve the issue. As a temporary workaround, consider restricting the use of custom trusted forwarders with ERC2771Context until the update is applied. Avoid using calldata shorter than 20 bytes in calls that originate from custom trusted forwarders until the issue is resolved.

Exploit

Fix

Improper Encoding or Escaping of Output

Weakness Enumeration

CWE-116

Related Identifiers

CVE-2023-40014

GHSA-G4VP-M682-QQMP

Affected Products

Openzeppelin Contracts

References · 17

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/40xxx/CVE-2023-40014.json · Exploit
• https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-g4vp-m682-qqmp · Vendor Advisory
• https://github.com/OpenZeppelin/openzeppelin-contracts/commit/e4435eed757d4309436b1e06608e97b6d6e2fdb5 · Patch
• https://github.com/OpenZeppelin/openzeppelin-contracts/pull/4481 · Vendor Advisory
• https://github.com/OpenZeppelin/openzeppelin-contracts/pull/4484 · Vendor Advisory
• https://github.com/OpenZeppelin/openzeppelin-contracts/commit/9445f96223041abf2bf08daa56f8da50b674cbcd · Patch
• https://cve.org/CVERecord?id=CVE-2023-40014 · Security Note
• https://osv.dev/vulnerability/CVE-2023-40014 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-40014 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-g4vp-m682-qqmp · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-40014 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-40014 · Vendor Advisory
• https://github.com/OpenZeppelin/openzeppelin-contracts · Note
• https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.3/CHANGELOG.md · Note
• https://github.com/OpenZeppelin/openzeppelin-contracts/releases/tag/v4.9.3 · Note