The at daemon must not execute group-writable or world-writable programs.

From Oracle Linux 5 Security Technical Implementation Guide

Associated with: CCI-000225

SV-64469r1_rule The at daemon must not execute group-writable or world-writable programs.

Vulnerability 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 For each "at" job file, determine which programs are executed. Procedure: # more Check the each program executed by "at" for group- or world-writable permissions. Procedure: # ls -la If "at" executes group or world-writable programs, this is a finding.

Fix text

Remove group-write and world-write permissions from files executed by at jobs. Procedure: # chmod go-w

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