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CVE-2023-37902— Vyper's ecrecover can return undefined data if signature does not verify

Quick assessment

Affected
vyperlang vyper
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.

Vyper是EVM 的 Pythonic 智能合约语言。 Vyper 0.3.10之前版本存在安全漏洞，该漏洞源于允许ecrecover为无效签名返回未定义的数据。

CVSS 5.3 · Medium EPSS 0.57% · P46

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-37902

Vulnerability Information
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Vulnerability Title
Vyper's ecrecover can return undefined data if signature does not verify
Source: CVE Program / CVE List V5
Vulnerability Description
Vyper is a Pythonic programming language that targets the Ethereum Virtual Machine (EVM). Prior to version 0.3.10, the ecrecover precompile does not fill the output buffer if the signature does not verify. However, the ecrecover builtin will still return whatever is at memory location 0. This means that the if the compiler has been convinced to write to the 0 memory location with specially crafted data (generally, this can happen with a hashmap access or immutable read) just before the ecrecover, a signature check might pass on an invalid signature. Version 0.3.10 contains a patch for this issue.
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
未加检查的返回值
Source: CVE Program / CVE List V5
Vulnerability Title
Vyper 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vyper是EVM 的 Pythonic 智能合约语言。 Vyper 0.3.10之前版本存在安全漏洞，该漏洞源于允许ecrecover为无效签名返回未定义的数据。
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
vyperlang vyper < 0.3.10 -

II. Public POCs for CVE-2023-37902

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III. Intelligence Information for CVE-2023-37902

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Patches & Fixes for CVE-2023-37902 (1)

Vendor Advisories for CVE-2023-37902 (1)

IV. Related Vulnerabilities

Same product: vyper
Same vendor: vyperlang
Same weakness: CWE-252

V. Comments for CVE-2023-37902

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