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The at.allow file must not have an extended ACL.


Overview

Finding ID Version Rule ID IA Controls Severity
V-22390 GEN003245 SV-37495r1_rule ECLP-1 Medium
Description
File system extended ACLs provide access to files beyond what is allowed by the mode numbers of the files. Unauthorized modification of the at.allow file could result in Denial of Service to authorized "at" users and the granting of the ability to run "at" jobs to unauthorized users.
STIG Date
Red Hat Enterprise Linux 5 Security Technical Implementation Guide 2017-03-01

Details

Check Text ( C-36151r1_chk )
Check the permissions of the file.
# ls -lL /etc/at.allow
If the permissions include a '+', the file has an extended ACL. If the file has an extended ACL and it has not been documented with the IAO, this is a finding.
Fix Text (F-31402r1_fix)
Remove the extended ACL from the file.
# setfacl --remove-all /etc/at.allow