Openscap
Installation
Download Security Policies
CentOS/RHEL 6
wget https://www.redhat.com/security/data/oval/Red_Hat_Enterprise_Linux_6.xml
CentOS/RHEL 7
wget https://www.redhat.com/security/data/oval/Red_Hat_Enterprise_Linux_7.xml
Scanning a system
oscap oval eval --results rhsa-results-oval.xml --report oval-report.html Red_Hat_Enterprise_Linux_6.xml
References & further reading
https://www.open-scap.org/
http://static.open-scap.org/openscap-1.0/oscap_user_manual.html
https://github.com/OpenSCAP/scap-security-guide/releases
https://github.com/OpenSCAP/
https://www.open-scap.org/resources/documentation/perform-vulnerability-scan-of-rhel-6-machine/