~/talk

What Have I Modified in SELinux: a new addition to your SELinux toolbox

Talkat DevConf.CZ 2025 · 2025-06-12..06-14· [linux-and-operating-systems, security]
linkedin:juraj-marcin
slides:none on file

Tool called WhimSE scans installed packages and the running SELinux policy, downloads package policy versions when needed, and compares modules, module priorities, file contexts, booleans and local semanage changes to report added, removed or overridden policy pieces. It outputs a structured report (outputs JSON/HTML/plain text), traces ABC denials to up to three possible removed or attribute-level allow rules (finds ABC denial causes), supports Distributed SELinux Policies and package-versus-latest comparisons, and runs fast (10 seconds and ~100 MB) versus sedif’s minutes and ~9 GB.

AI-written summary · about

  1. 0:00SELinux modifications intro
  2. 1:26Limitations of SELinux tools
  3. 2:33Introducing WHIMSY
  4. 4:40Live demo of WHIMSY
  5. 7:53Analyzing denials with WHIMSY
  6. 8:37Get WHIMSY and future plans
  7. 11:47Q&A
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