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CVE-2023-40014— OpenZeppelin Contracts's ERC2771Context with custom forwarder may lead to zero-valued _msgSender

Quick assessment

Affected
OpenZeppelin openzeppelin-contracts
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenZeppelin是一个应用软件。一个安全区块链应用的标准。 OpenZeppelin Contracts 4.0.0版本至4.9.3之前版本存在安全漏洞，该漏洞源于签名者地址被附加到源自转发器的所有调用中。

CVSS 5.3 · Medium EPSS 0.74% · P54

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-40014

Vulnerability Information
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Vulnerability Title
OpenZeppelin Contracts's ERC2771Context with custom forwarder may lead to zero-valued _msgSender
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对输出编码和转义不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
OpenZeppelin 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenZeppelin是一个应用软件。一个安全区块链应用的标准。 OpenZeppelin Contracts 4.0.0版本至4.9.3之前版本存在安全漏洞，该漏洞源于签名者地址被附加到源自转发器的所有调用中。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenZeppelin openzeppelin-contracts >= 4.0.0, < 4.9.3 -

II. Public POCs for CVE-2023-40014

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III. Intelligence Information for CVE-2023-40014

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Patches & Fixes for CVE-2023-40014 (4)

Vendor Advisories for CVE-2023-40014 (1)

Other References for CVE-2023-40014 (1)

IV. Related Vulnerabilities

Same product: openzeppelin-contracts
Same vendor: OpenZeppelin
Same weakness: CWE-116

V. Comments for CVE-2023-40014

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