crc32fast

Details

**Severity:** Critical

**Affected versions:** `= 1.0.99`

## Source: kam193 (3b89c674974bf58c7388a27bf1c6ea954a890de45a3e9ba4830c1eada3a3ea6a)
Installing the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.


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Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.


Campaign: GENERIC-standard-pypi-install-pentest


Reasons (based on the campaign):


 - The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.


 - The package overrides the install command in setup.py to execute malicious code during installation.

## Source: ossf-package-analysis (01c9a259f7b88e992aee84db09b728b15f74a517857ab5b3aaa16f725a9debbd)
The OpenSSF Package Analysis project identified 'crc32fast' @ 1.0.99 (pypi) as malicious.

It is considered malicious because:

- The package communicates with a domain associated with malicious activity.

- The package executes one or more commands associated with malicious behavior.

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/crc32fast/MAL-2026-902.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/crc32fast
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/crc32fast/MAL-2026-902.json
- https://github.com/advisories/GHSA-hpr3-gc4w-rfh8

Compromised versions (1)

• = 1.0.99

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.