December 2016
Intermediate to advanced
300 pages
6h 36m
English
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Limiting the scope of transitions
For security reasons, Linux systems can reduce the ability for processes to gain elevated privileges under certain situations or provide additional constraints to reduce the likelihood of vulnerabilities to be exploitable. The SELinux developers too honor these situations.
Sanitizing environments on transition
When a higher-privileged command is executed (be it a setuid application or one where capabilities are added to the session), the GNU C Library (glibc) will sanitize the environment. This means that a set of sensitive environment variables is discarded to make sure that attackers or malicious persons or applications cannot influence the session.
This secure execution is controlled through an Executable and ...
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