Bug 2207715

Summary: [RHEL9]python-setuptools: Python tarfile extraction needs change to avoid a warning (CVE-2007-4559 mitigation)
Product: Red Hat Enterprise Linux 9 Reporter: Petr Viktorin (pviktori) <pviktori>
Component: python-setuptoolsAssignee: Python Maintainers <python-maint>
Status: CLOSED NOTABUG QA Contact: RHEL CS Apps Subsystem QE <rhel-cs-apps-subsystem-qe>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 9.3CC: cstratak
Target Milestone: rc   
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Hardware: Unspecified   
OS: Unspecified   
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: 2218243 2218246 2218274 (view as bug list) Environment:
Last Closed: 2023-07-11 14:30:02 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Blocks: 263261, 2217897, 2217902, 2218234, 2218274    

Description Petr Viktorin (pviktori) 2023-05-16 15:47:52 UTC 
Hello,
In RHEL 9.3 and 8.9, we're planning to fix the long-standing CVE-2007-4559: Python's `tarfile` module makes it too easy to extract tarballs in an unsafe way.
Unfortunately, for the CVE to be considered fixed, this needs a behavior change. (If you don't think this is the case, let's bring it up with the security team.)
Upstream, Python will emit deprecation warnings for 2 releases, but in RHEL we change the behavior now, emit warnings, and provide ways for customers to restore earlier behavior.
To avoid the warning, software shipped by Red Hat will need a change.

For more details see upstream PEP 706: https://peps.python.org/pep-0706
and the Red Hat knowledge base draft: https://access.redhat.com/articles/7004769

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The file to change is /usr/lib/python3.*/site-packages/setuptools/archive_util.py. We probably want the 'tar' filter here, for a quick fix.
Comment 1 Petr Viktorin (pviktori) 2023-07-11 14:30:02 UTC 
On closer inspection, the extraction code in setuptools
- avoids the CVE by avoiding symlinks and parent directory traversal
- avoids the warning by using undocumented internals
- is only used in deprecated paths (easy_install, install_egg_info) and tests

I'll close this as not affected.