Bug 2343237 (CVE-2025-0938)

Summary: CVE-2025-0938 python: cpython: URL parser allowed square brackets in domain names
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in Python. The Python standard library functions `urllib.parse.urlsplit` and `urlparse` accept domain names that included square brackets, which isn't valid according to RFC 3986. Square brackets are only meant to be used as delimiters for specifying IPv6 and IPvFuture hosts in URLs. This could result in differential parsing across the Python URL parser and other specification-compliant URL parsers.
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Bug Depends On: 2343272, 2343273, 2343274, 2343275, 2343276, 2343277, 2343278, 2343279    
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Description OSIDB Bzimport 2025-01-31 18:01:10 UTC 
The Python standard library functions `urllib.parse.urlsplit` and `urlparse` accepted domain names that included square brackets which isn't valid according to RFC 3986. Square brackets are only meant to be used as delimiters for specifying IPv6 and IPvFuture hosts in URLs. This could result in differential parsing across the Python URL parser and other specification-compliant URL parsers.
Comment 2 errata-xmlrpc 2025-05-13 08:29:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:6977 https://access.redhat.com/errata/RHSA-2025:6977
Comment 3 errata-xmlrpc 2025-05-13 10:00:00 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:7107 https://access.redhat.com/errata/RHSA-2025:7107
Comment 4 errata-xmlrpc 2025-05-13 10:01:12 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:7109 https://access.redhat.com/errata/RHSA-2025:7109