Level 2 - Server Level 2 - Workstation
Monitor privileged programs (those that have the setuid and/or setgid bit set on execution) to determine if unprivileged users are running these commands.
Execution of privileged commands by non-privileged users could be an indication of someone trying to gain unauthorized access to the system.
Run the following command replacing <partition> with a list of partitions where programs can be executed from on your system:
# find <partition> -xdev \( -perm -4000 -o -perm -2000 \) -type f | awk '{print \ "-a always,exit -F path=" $1 " -F perm=x -F auid>=1000 -F auid!=4294967295 \ -k privileged" }'
Verify all resulting lines are in the /etc/audit/audit.rules file.
To remediate this issue, the system administrator will have to execute a find command to locate all the privileged programs and then add an audit line for each one of them. The audit parameters associated with this are as follows:
-F path=“ $1 ” - will populate each file name found through the find command and processed by awk.
-F perm=x - will write an audit record if the file is executed.
-F auid>=1000 - will write a record if the user executing the command is not a privileged user.
-F auid!= 4294967295 - will ignore Daemon events
All audit records should be tagged with the identifier “privileged”.
Run the following command replacing <partition> with a list of partitions where programs can be executed from on your system:
# find <partition> -xdev \( -perm -4000 -o -perm -2000 \) -type f | awk '{print \ "-a always,exit -F path=" $1 " -F perm=x -F auid>=1000 -F auid!=4294967295 \ -k privileged" }'
Add all resulting lines to the /etc/audit/audit.rules file.