Cis Ubuntu1604 V200 1 3 1

CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0 - 1.3.1

Profile Applicability

• Level 1 - Server
• Level 1 - Workstation

Description

AIDE takes a snapshot of filesystem state including modification times, permissions, and file hashes which can then be used to compare against the current state of the filesystem to detect modifications to the system.

Rationale

By monitoring the filesystem state compromised files can be detected to prevent or limit the exposure of accidental or malicious misconfigurations or modified binaries.

Audit Procedure

Command Line

Run the following commands to verify AIDE is installed:

dpkg -s aide | grep -E '(Status:|not installed)'

Expected output: Status: install ok installed

dpkg -s aide-common | grep -E '(Status:|not installed)'

Expected output: Status: install ok installed

Expected Result

Both aide and aide-common packages should show Status: install ok installed.

Remediation

Command Line

Install AIDE using the appropriate package manager or manual installation:

apt install aide aide-common

Configure AIDE as appropriate for your environment. Consult the AIDE documentation for options.

Run the following commands to initialize AIDE:

aideinit
mv /var/lib/aide/aide.db.new /var/lib/aide/aide.db

Additional Information

The prelinking feature can interfere with AIDE because it alters binaries to speed up their start up times. Run prelink -ua to restore the binaries to their prelinked state, thus avoiding false positives from AIDE.

Default Value

AIDE is not installed by default.

References

None.

CIS Controls

Assessment Status

Automated