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-rw-r--r--Documentation/admin-guide/LSM/Yama.rst7
1 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/admin-guide/LSM/Yama.rst b/Documentation/admin-guide/LSM/Yama.rst
index d0a060de3973..d9cd937ebd2d 100644
--- a/Documentation/admin-guide/LSM/Yama.rst
+++ b/Documentation/admin-guide/LSM/Yama.rst
@@ -19,9 +19,10 @@ attach to other running processes (e.g. Firefox, SSH sessions, GPG agent,
etc) to extract additional credentials and continue to expand the scope
of their attack without resorting to user-assisted phishing.
-This is not a theoretical problem. SSH session hijacking
-(http://www.storm.net.nz/projects/7) and arbitrary code injection
-(http://c-skills.blogspot.com/2007/05/injectso.html) attacks already
+This is not a theoretical problem. `SSH session hijacking
+<https://www.blackhat.com/presentations/bh-usa-05/bh-us-05-boileau.pdf>`_
+and `arbitrary code injection
+<https://c-skills.blogspot.com/2007/05/injectso.html>`_ attacks already
exist and remain possible if ptrace is allowed to operate as before.
Since ptrace is not commonly used by non-developers and non-admins, system
builders should be allowed the option to disable this debugging system.