STIGQter: STIG Summary: Riverbed NetIM OS Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 11 Sep 2025:

Ubuntu OS must be configured so that the script that runs each 30 days or less to check file integrity is the default.

DISA Rule

SV-275672r1148066_rule

Vulnerability Number

V-275672

Group Title

SRG-OS-000446-GPOS-00200

Rule Version

RIIM-OS-651025

Severity

CAT II

CCI(s)

• CCI-002699 - Perform verification of the correct operation of organization-defined security functions: when the system is in an organization-defined transitional state; upon command by a user with appropriate privileges; and/or on an organization-defined frequency.

Weight

10

Fix Recommendation

The cron file for AIDE is fairly complex as it creates the report. This file is installed with the "aide-common" package, and the default can be restored by copying it from the package:

Extract the aide script from the "aide-common" package to its original place:

$ dpkg-deb --fsys-tarfile /tmp/aide-common_*.deb | sudo tar -x ./usr/share/aide/config/cron.daily/aide -C /

Copy it to the cron.daily directory:

$ sudo cp -f /usr/share/aide/config/cron.daily/aide /etc/cron.daily/aide

Check Contents

Verify that the Advanced Intrusion Detection Environment (AIDE) default script used to check file integrity each 30 days or less is unchanged.

Download the original aide-common package in the /tmp directory:

$ cd /tmp; apt download aide-common

Fetch the SHA1 of the original script file:

$ dpkg-deb --fsys-tarfile /tmp/aide-common_*.deb | tar -xO ./usr/share/aide/config/cron.daily/aide | sha1sum
b71bb2cafaedf15ec3ac2f566f209d3260a37af0 -

Compare with the SHA1 of the file in the daily or monthly cron directory:

$ sha1sum /etc/cron.{daily,monthly}/aide 2>/dev/null
b71bb2cafaedf15ec3ac2f566f209d3260a37af0 /etc/cron.daily/aide

If there is no AIDE script file in the cron directories, or the SHA1 value of at least one file in the daily or monthly cron directory does not match the SHA1 of the original, this is a finding.

Vulnerability Number

V-275672

Documentable

False

Rule Version

RIIM-OS-651025

Severity Override Guidance

Verify that the Advanced Intrusion Detection Environment (AIDE) default script used to check file integrity each 30 days or less is unchanged.

Download the original aide-common package in the /tmp directory:

$ cd /tmp; apt download aide-common

Fetch the SHA1 of the original script file:

$ dpkg-deb --fsys-tarfile /tmp/aide-common_*.deb | tar -xO ./usr/share/aide/config/cron.daily/aide | sha1sum
b71bb2cafaedf15ec3ac2f566f209d3260a37af0 -

Compare with the SHA1 of the file in the daily or monthly cron directory:

$ sha1sum /etc/cron.{daily,monthly}/aide 2>/dev/null
b71bb2cafaedf15ec3ac2f566f209d3260a37af0 /etc/cron.daily/aide

If there is no AIDE script file in the cron directories, or the SHA1 value of at least one file in the daily or monthly cron directory does not match the SHA1 of the original, this is a finding.

Check Content Reference

M

Target Key

5706