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CVE-2020-29367: blosc2 heap-based buffer overflow

May 24, 2022 (updated April 25, 2025)

blosc2.c in Blosc C-Blosc2 through 2.0.0.beta.5 has a heap-based buffer overflow when there is a lack of space to write compressed data.

References

  • bugs.chromium.org/p/oss-fuzz/issues/detail?id=26442
  • github.com/Blosc/c-blosc2/commit/c4c6470e88210afc95262c8b9fcc27e30ca043ee
  • github.com/Blosc/python-blosc2
  • github.com/Blosc/python-blosc2/releases/tag/v0.1.7
  • github.com/advisories/GHSA-8c7c-2c8j-3xfp
  • github.com/pypa/advisory-database/tree/main/vulns/blosc2/PYSEC-2020-343.yaml
  • nvd.nist.gov/vuln/detail/CVE-2020-29367

Code Behaviors & Features

Detect and mitigate CVE-2020-29367 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →

Affected versions

All versions before 0.1.7

Fixed versions

  • 0.1.7

Solution

Upgrade to version 0.1.7 or above.

Impact 7.8 HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Learn more about CVSS

Weakness

  • CWE-787: Out-of-bounds Write

Source file

pypi/blosc2/CVE-2020-29367.yml

Spotted a mistake? Edit the file on GitLab.

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