Computer Security: Principles and Practice - University of Kansas
Computer Security: Principles and Practice
Chapter 23 ? Linux Security
EECS 710 Professor: Dr. Hossein Saiedian Presented by Ankit Agarwal
1
Outline
? Introduction ? Linux Security Model ? Linux File-System Security ? Linux Vulnerabilities ? Linux System Hardening ? Application Security ? Mandatory Access Controls
2
Introduction
? Linux ? Unix like computer OS that uses Linux kernel ? created by Linus Torvalds in 1991 ? evolved into a popular alternative to Win and MAC OS ? has many features and applications
? desktop and server OS, embedded systems ? hence wide variety of attacks possible ? various security tools available
? it uses Discretionary Access Control Model ? Mandatory Access Controls implemented
? to make up for DAC shortcomings ? SELinux and Novell AppArmor
3
Outline
? Introduction ? Linux Security Model ? Linux File-System Security ? Linux Vulnerabilities ? Linux System Hardening ? Application Security ? Mandatory Access Controls
4
Linux Security Model
? Traditional security model
? people or processes with "root" privileges can do anything ? other accounts can do much less
? Goal of hackers ? to gain root privilege
? Linux can be run robust and secure
? many system admins. fail to use the security features ? add-on tools like sudo and Tripwire available
? Crux of the problem ? Discretionary Access Control
5
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