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CVE-2023-42460

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Date: September 26, 2023

Vyper is a Pythonic Smart Contract Language for the EVM. The "_abi_decode()" function does not validate input when it is nested in an expression. Uses of "_abi_decode()" can be constructed which allow for bounds checking to be bypassed resulting in incorrect results. This issue has not yet been fixed, but a fix is expected in release "0.3.10". Users are advised to reference pull request #3626.

Language: Python

Severity Score

Related Resources (6)

https://github.com/vyperlang/vyper/security/advisories/GHSA-cx2q-hfxr-rj97
https://github.com/vyperlang/vyper/pull/3626
https://github.com/pypa/advisory-database/tree/main/vulns/vyper/PYSEC-2023-191.yaml
https://nvd.nist.gov/vuln/detail/CVE-2023-42460
https://github.com/vyperlang/vyper
https://www.mend.io/vulnerability-database/CVE-2023-42460

Severity Score

Weakness Type (CWE)

Incorrect Calculation

CWE-682

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

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