A restricted shell break out is possible in Overland Guardian OS that allows a user to achieve uid 0 privilege escalation.
2fcbf55ed90b6c1ac64c15e2923351d5f40d54f6ed8ddfbc08d525b344c37b46Device: Snap Server 410
OS: GuardianOS 5.1.041
Description: When logged in to CLI via ssh as admin (uid=1) you can escalate your privileges to uid 0 and get /bin/sh. In order to achieve this open 'less' which is available as default for viewing files (ie. less /tmp/top.log) and type in '!/bin/sh'. This will give you direct access to sh shell with UID 0. Tested only on OS version as above.
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