CVE-2021-33430: NumPy Buffer Overflow (Disputed)

CVE-2021-33430 · Severity: low · CVSS 3.1 · Published 2021-12-17

A Buffer Overflow vulnerability exists in NumPy 1.9.x in the PyArray_NewFromDescr_int function of ctors.c when specifying arrays of large dimensions (over 32) from Python code, which could let a malicious user cause a Denial of Service.

Technologies: numpy (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2021-33430 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2021-33430 being exploited in the wild.
How severe is CVE-2021-33430?
Low severity, with a CVSS score of 3.1, published 17 December 2021.
Which products and versions are affected?
numpy (PyPI) ECOSYSTEM:introduced=1.9.0,fixed=1.10.0, ECOSYSTEM:introduced=1.9.0,fixed=1.21.
Is there a fix for CVE-2021-33430?
Yes. numpy (PyPI): upgrade to 1.10.0, 1.21 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2021-33430?
Check whether you run numpy (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

  • numpy (PyPI): upgrade to 1.10.0, 1.21 or later
    pip install "numpy>=1.21"

Affected products

  • numpy (PyPI) ECOSYSTEM:introduced=1.9.0,fixed=1.10.0, ECOSYSTEM:introduced=1.9.0,fixed=1.21

Identifiers

  • CVE-2021-33430
  • GHSA-6p56-wp2h-9hxr
  • PYSEC-2021-854

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