Skill Set Name: OS Security | NEAOSS Wiki

Skill Set Name: OS Security

Topics	Level	Sub topics	Skill Category No	Code Share	comment
OS Security Concepts	I	Understanding security threats and attacks on operating systems. Understanding basic concepts on operating system security Understanding related criteria on secure operating system Understanding OS security related criteria Understanding OS Security threats and attacks virus & worms Trojan horse buffer overflow logic bomb covert channel Understanding basic OS security concepts reference monitor trusted computing base security function & security assurance Understanding OS security related criteria TCSEC CC Other criteria	7-3-1-I
OS Security Mechanisms	I	Understanding basic security mechanisms in trusted operating systems, including identification & authentication, discretionary & mandatory access control, integrity protection, least privilege management, trusted path, trusted recovery, covert channel, object reuse, audit and so on. Understanding basic security mechanisms in trusted operating systems, including: identification & authentication discretionary & mandatory access control integrity protection least privilege management trusted path trusted recovery covert channel object reuse audit	7-3-2-I
OS Security Mechanisms	II	Knowing how to use current security mechanisms in Linux systems. Knowing how to use user identification and authentication commands and related files Commands, e.g. useradd, userdel, usermod, password … Files, e.g. /etc/passwd, etc/shadow, … Knowing how to use discretionary access control commands 9 bit mechanism, e.g. chmod, chown, … commands ACL (Access Control List) mechanism, e.g. setfacl, chfacl, getfacl,… commands Knowing how to use audit and log services and files, e.g. syslogd… , /etc/syslog.conf, ... Knowing how to use network security related services and files, e.g. /etc/xinetd.d, /etc/services … , etc/hosts.allow, etc/hosts.deny, …	7-3-2-II
OS Security Models	II	Understanding typical and practical security models in Linux systems Understanding multilevel security policy and confidentiality model Bell-LaPadula Model Understanding integrity protection policy and integrity models Biba Clark-Wilson Understanding multi-policy security and neutral security models RBAC (Role Based Access Control) UCON (Usage Control) TE/DTE (Type Enforcement/Domain and Type Enforcement) Chinese Wall Understanding MAC (mandatory access control) Other security models (selected) Information flow Non-interference	7-3-3-II
Linux Security Module-LSM	II	Understanding flask security architecture and LSM framework Knowing the structure of Linux security module and hook functions Opaque security fields such as void *security Calls to security hook functions Security system call such as sys_security() Registering security modules Capabilities Understanding what LSM can and cannot do.	7-3-4-II
Linux Security Module-LSM	III	Knowing how to design and implement security mechanisms in Linux. Knowing how to implement security mechanisms with LSM framework in Linux DTE Linux DTE Policy DTE Implementation How to use POSIX.1e Capabilities Capability Definition Capability Implementation How to use	7-3-4-III
SELinux	II	Understanding SELinux MAC security policies and policy language Understanding the Configurable policies in SELinux Type Enforcement (TE) Role Based Access Control (RBAC) Multi Level Security (MLS) and Multi Category Security (MCS) Understanding flask security architecture Object manager Security server Understanding what SELinux can and cannot do. Understanding and knowing how to use SELinux policy language Ability to enforce confidentiality and integrity guarantees. Ability to confine flawed and malicious applications.	7-3-5-II
SELinux	III	Knowing how to use the policy language, related security management and policy analysis tools. Knowing SELinux Security architecture and implementation. Knowing the SELinux architecture and implementation Flask architecture SHARED CODE 7-3-3-I SELinux LSM Module Data structures Hook Functions Security system calls Module registering Knowing how to use SELinux management and policy analysis tools checkpolicy libselinux libsemanage libsepol policycoreutils	7-3-5-III
Various implementations	II	Understanding characteristics of various implementations. SMACK TOMOYO Linux AppArmor grsecurity	7-3-6-II