Open Babel out-of-bounds write in translationVectors parsing

Severity: critical · CVSS 9.8 · Published 2023-07-21

Open Babel, a widely used library for converting chemical file formats, contains a critical memory handling flaw. By providing a specially crafted chemical data file (such as Gaussian or MSI formats), an attacker can cause the software to crash or execute unauthorized code. This is particularly significant for web-based chemical converters or molecule viewers that use this library to process user-uploaded files.

Technologies: openbabel (PyPI). Vendors: PyPI.

Quick answers

Is This vulnerability exploited in the wild?
No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.
How severe is This vulnerability?
Critical severity, with a CVSS score of 9.8, published 21 July 2023.
Which products and versions are affected?
openbabel (PyPI) < 3.2.0.
Is there a fix for This vulnerability?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is This vulnerability attacked?
It is attacked over the network, in a software library.
Am I affected?
Check whether you run openbabel (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.

Technical details

Multiple out-of-bounds (OOB) write vulnerabilities exist in the translationVectors parsing logic across several file format parsers in Open Babel, including MSI, MOPAC, and Gaussian. The root cause is a failure to validate the number of translation vectors read from an input file against the fixed-size 'translationVectors' array (typically size 3) on the stack. An attacker can provide a malformed file with excessive vector entries to overflow the stack buffer, potentially leading to arbitrary code execution. The vulnerability is reachable via the 'obabel' command-line tool or any application using the Open Babel library to parse untrusted chemical data files. The issue was addressed in version 3.2.0.

Affected products

  • Open Babel Open Babel 3.1.1, master commit 530dbfa3

Timeline

  • 2023-07-21: advisory: Original Talos and GitHub advisories published
  • 2026-07-01: other: Advisory GHSA-83c5-hghm-jg6r withdrawn as a duplicate of GHSA-f8h2-c479-vqxf

References

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