V-988

Discussion

If the "at" facility executes world-writable or group-writable programs, it is possible for the programs to be accidentally or maliciously changed or replaced without the owner's intent or knowledge. This would cause a system security breach.

Check Content

List the "at" jobs on the system.

Procedure:
# ls -la /var/spool/at /var/spool/atjobs

For each "at" job file, determine which programs are executed.

Procedure:
# more <at job file>

Check the each program executed by "at" for group- or world-writable permissions.
Procedure:
# ls -la <at program file>

If "at" executes group or world-writable programs, this is a finding.