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CVE-2023-32058— Vyper vulnerable to integer overflow in loop

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 0.3.8之前版本存在输入验证错误漏洞，该漏洞源于缺少对循环变量的溢出检查。

CVSS 7.5 · High EPSS 0.91% · P57

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-32058

Vulnerability Information
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Vulnerability Title
Vyper vulnerable to integer overflow in loop
Source: CVE Program / CVE List V5
Vulnerability Description
Vyper is a Pythonic smart contract language for the Ethereum virtual machine. Prior to version 0.3.8, due to missing overflow check for loop variables, by assigning the iterator of a loop to a variable, it is possible to overflow the type of the latter. The issue seems to happen only in loops of type `for i in range(a, a + N)` as in loops of type `for i in range(start, stop)` and `for i in range(stop)`, the compiler is able to raise a `TypeMismatch` when trying to overflow the variable. The problem has been patched in version 0.3.8.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
Vyper 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vyper是EVM 的 Pythonic 智能合约语言。 Vyper 0.3.8之前版本存在输入验证错误漏洞，该漏洞源于缺少对循环变量的溢出检查。
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 < 0.3.8 -

II. Public POCs for CVE-2023-32058

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III. Intelligence Information for CVE-2023-32058

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Patches & Fixes for CVE-2023-32058 (1)

Vendor Advisories for CVE-2023-32058 (1)

Same Patch Batch · vyperlang · 2023-05-11 · 3 CVEs total

CVE-2023-31146 7.5 HIGH Vyper vulnerable to OOB DynArray access when array is on both LHS and RHS of an assignment
CVE-2023-32059 7.5 HIGH Vyper vulnerable to incorrect ordering of arguments for kwargs passed to internal calls

IV. Related Vulnerabilities

Same product: vyper
Same vendor: vyperlang
Same weakness: CWE-190

V. Comments for CVE-2023-32058

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