CVE-2021-3426

A flaw was found in Python 3's pydoc. This flaw allows a local or adjacent attacker who discovers or can convince another local or adjacent user to start a pydoc server to access the server and then use it to disclose sensitive information belonging to the other user that they would not normally have the ability to access. The highest threat from this vulnerability is to data confidentiality.

Red Hat Quay from version 3.4 uses Python from Red Hat Enterprise Linux RPM repositories and therefore may receive an update for this issue in a future release. Earlier versions of Red Hat Quay will not receive a patch for this issue.

Python 2.x.x as shipped in any Red Hat product is not affected. This flaw is out of support scope for python3 as shipped with Red Hat Enterprise Linux 7. For more information about Red Hat Enterprise Linux support scope, please see https://access.redhat.com/support/policy/updates/errata/ .

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Use the console (no argument needed) or HTML file (-w argument) output to generate docs rather than the HTTP server options. Put differently, do not use the -p or -n options of pydoc.