CVE-2024-26149: Vyper's `_abi_decode` vulnerable to Memory Overflow

CVE-2024-26149 · Severity: low · CVSS 3.1 · Published 2024-02-26

Vyper is a pythonic Smart Contract Language for the ethereum virtual machine. If an excessively large value is specified as the starting index for an array in `_abi_decode`, it can cause the read position to overflow. This results in the decoding of values outside the intended array bounds, potentially leading to exploitations in contracts that use arrays within `_abi_decode`. This vulnerability affects 0.3.10 and earlier versions.

Technologies: vyper (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2024-26149 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2024-26149 being exploited in the wild.
How severe is CVE-2024-26149?
Low severity, with a CVSS score of 3.1, published 26 February 2024.
Which products and versions are affected?
vyper (PyPI) ECOSYSTEM:introduced=0,fixed=0.4.0, ECOSYSTEM:introduced=0,fixed=0.4.0b1.
Is there a fix for CVE-2024-26149?
Yes. vyper (PyPI): upgrade to 0.4.0, 0.4.0b1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2024-26149?
Check whether you run vyper (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • vyper (PyPI): upgrade to 0.4.0, 0.4.0b1 or later
    pip install "vyper>=0.4.0b1"

Affected products

  • vyper (PyPI) ECOSYSTEM:introduced=0,fixed=0.4.0, ECOSYSTEM:introduced=0,fixed=0.4.0b1

Identifiers

  • CVE-2024-26149
  • GHSA-9p8r-4xp4-gw5w
  • PYSEC-2024-164

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