CVE-2021-41496: Buffer Copy without Checking Size of Input in NumPy

CVE-2021-41496 · Severity: low · CVSS 3.1 · Published 2021-12-17

Buffer overflow in the array_from_pyobj function of fortranobject.c in NumPy < 1.19, which allows attackers to conduct a Denial of Service attacks by carefully constructing an array with negative values.

Technologies: numpy (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2021-41496 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2021-41496 being exploited in the wild.
How severe is CVE-2021-41496?
Low severity, with a CVSS score of 3.1, published 17 December 2021.
Which products and versions are affected?
numpy (PyPI) ECOSYSTEM:introduced=0,fixed=1.19, ECOSYSTEM:introduced=0,fixed=1.19.0.
Is there a fix for CVE-2021-41496?
Yes. numpy (PyPI): upgrade to 1.19, 1.19.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2021-41496?
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 1.19, 1.19.0 or later
    pip install "numpy>=1.19.0"

Affected products

  • numpy (PyPI) ECOSYSTEM:introduced=0,fixed=1.19, ECOSYSTEM:introduced=0,fixed=1.19.0

Identifiers

  • CVE-2021-41496
  • GHSA-f7c7-j99h-c22f
  • PYSEC-2021-857

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