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← Back to SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

V-22390

CAT II (Medium)

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

Rule ID

SV-45639r1_rule

STIG

SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

Version

V1R12

CCIs

CCI-000225

Discussion

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.

Check Content

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

Remove the extended ACL from the file.
# setfacl --remove-all /etc/at.allow