V-794

Discussion

Restricting permissions will protect system command files from unauthorized modification. System command files include files present in directories used by the operating system for storing default system executables and files present in directories included in the system's default executable search paths.

Check Content

Check the permissions for files in /etc, /bin, /usr/bin, /usr/local/bin, /sbin, /usr/sbin and /usr/local/sbin.

Procedure:
# DIRS="/etc /bin /usr/bin /usr/local/bin /sbin /usr/sbin /usr/local/sbin";for DIR in $DIRS;do find $DIR -type f -perm +022 -exec stat -c %a:%n {} \;;done

This will return the octal permissions and name of all group or world writable files. If any file listed is world or group writable (either or both of the 2 lowest order digits contain a 2, 3 or 6), this is a finding.

Note: Elevate to Severity Code I if any file listed is world-writable.