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Bug 2231023 - setroubleshoot dies when an incompatible selinux python module exists in /usr/local/lib
Summary: setroubleshoot dies when an incompatible selinux python module exists in /usr...
Keywords:
Status: CLOSED MIGRATED
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: setroubleshoot
Version: 8.8
Hardware: All
OS: Linux
high
high
Target Milestone: rc
: ---
Assignee: Vit Mojzis
QA Contact: BaseOS QE Security Team
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2023-08-10 11:33 UTC by Renaud Métrich
Modified: 2023-09-19 20:22 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2023-09-19 20:21:07 UTC
Type: Bug
Target Upstream Version:
Embargoed:
pm-rhel: mirror+

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System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker   RHEL-5201 0 None Migrated None 2023-09-19 20:21:06 UTC
Red Hat Issue Tracker RHELPLAN-165487 0 None None None 2023-08-10 11:35:30 UTC

Description Renaud Métrich 2023-08-10 11:33:41 UTC 
Description of problem:

All platform-python scripts should be protected from using custom paths such as /usr/local/lib/python3.6, or else failure may happen when 3rd party python modules are present in such directory.

We have a customer hitting this issue due to having his own  /usr/local/lib/python3.6/site-packages/selinux module taking precedence other our module (/usr/lib64/python3.6/site-packages/selinux).

In order to avoid the issue, /usr/share/setroubleshoot/SetroubleshootPrivileged.py shebang has to be modified as shown below:
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
#!/usr/libexec/platform-python -Es
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------

Version-Release number of selected component (if applicable):

setroubleshoot-server-3.3.26-5.el8.x86_64

How reproducible:

Always

Steps to Reproduce:
1. Create a rogue selinux module

  -------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
  # mkdir -p /usr/local/lib/python3.6/site-packages/selinux
  # echo "BUG" > /usr/local/lib/python3.6/site-packages/selinux/__init__.py
  -------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------

2. Trigger an AVC or use the following python inline script to illustrate what would happen

  -------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
  # /usr/libexec/platform-python
  [...]
  >>> import selinux
  Traceback (most recent call last):
    File "<stdin>", line 1, in <module>
    File "/usr/local/lib/python3.6/site-packages/selinux/__init__.py", line 1, in <module>
      BUG
  NameError: name 'BUG' is not defined
  -------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------

Actual results:

  Faulty /usr/local/lib/python3.6/site-packages/selinux loaded instead of /usr/lib64/python3.6/site-packages/selinux

Expected results:

  /usr/lib64/python3.6/site-packages/selinux being loaded, as seen with "/usr/libexec/platform-python -Es":

  -------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
  # /usr/libexec/platform-python -Es
  [...]
  >>> import selinux
  >>> 
  -------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
Comment 2 RHEL Program Management 2023-09-19 17:51:53 UTC 
Issue migration from Bugzilla to Jira is in process at this time. This will be the last message in Jira copied from the Bugzilla bug.
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