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CVE-2024-32646— vyper performs double eval of the slice args when buffer from adhoc locations

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 及之前版本存在安全漏洞，该漏洞源于当缓冲区参数为 msg.data、self.code、<address>.code、start、length时，可能会导致安全问题。

CVSS 5.3 · Medium EPSS 0.46% · P38

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2024-32646

Vulnerability Information
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Vulnerability Title
vyper performs double eval of the slice args when buffer from adhoc locations
Source: CVE Program / CVE List V5
Vulnerability Description
Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. In versions 0.3.10 and prior, using the `slice` builtin can result in a double eval vulnerability when the buffer argument is either `msg.data`, `self.code` or `<address>.code` and either the `start` or `length` arguments have side-effects. It can be easily triggered only with the versions `<0.3.4` as `0.3.4` introduced the unique symbol fence. No vulnerable production contracts were found. Additionally, double evaluation of side-effects should be easily discoverable in client tests. As such, the impact is low. As of time of publication, no fixed versions are available.
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
输入验证不恰当
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 及之前版本存在安全漏洞，该漏洞源于当缓冲区参数为 msg.data、self.code、<address>.code、start、length时，可能会导致安全问题。
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-2024-32646

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III. Intelligence Information for CVE-2024-32646

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Vendor Advisories for CVE-2024-32646 (1)

Same Patch Batch · vyperlang · 2024-04-25 · 6 CVEs total

CVE-2024-32649 5.3 MEDIUM vyper performs double eval of the argument of sqrt
CVE-2024-32481 5.3 MEDIUM vyper's range(start, start + N) reverts for negative numbers
CVE-2024-32648 5.3 MEDIUM vyper default functions don't respect nonreentrancy keys
CVE-2024-32647 5.3 MEDIUM vyper performs double eval of raw_args in create_from_blueprint
CVE-2024-32645 5.3 MEDIUM vyper performs incorrect topic logging in raw_log

IV. Related Vulnerabilities

Same product: vyper
Same vendor: vyperlang
Same weakness: CWE-20

V. Comments for CVE-2024-32646

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