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Zc.buildout bootstrap.py domain-takeover risk security flaw

Vulnerability
First reported
Last updated
Happening score
H score 37
1 unique sources, 1 articles

Summary

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Legacy zc.buildout bootstrap.py files in multiple PyPI packages still reach python-distribute[.]org, creating a supply-chain compromise risk if the domain is taken over. The script can fetch and execute distribute_setup.py, so a developer who runs it could pull attacker-controlled code into the build path. Affected packages named in the disclosure include tornado, pypiserver, slapos.core, roman, xlutils, and testfixtures.

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Timeline

  1. 28.11.2025 18:27 2 articles · 7mo ago

    ReversingLabs identifies legacy zc.buildout bootstrap risk

    Initial Disclosure

    ReversingLabs identified legacy zc.buildout bootstrap.py files in PyPI packages that still reference python-distribute[.]org and can download and execute distribute_setup.py, leaving a hard-coded external dependency that could be abused through a domain takeover. The named packages include tornado, pypiserver, slapos.core, roman, xlutils, and testfixtures, and slapos.core and Tornado development or maintenance versions still ship the vulnerable code.

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