InformationAIDE 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.
By monitoring the filesystem state compromised files can be detected to prevent or limit the exposure of accidental or malicious misconfigurations or modified binaries.
SolutionInstall AIDE using the appropriate package manager or manual installation:
# yum install aide
Configure AIDE as appropriate for your environment. Consult the AIDE documentation for options.
Run the following commands:
# aide --init
# mv /var/lib/aide/aide.db.new.gz /var/lib/aide/aide.db.gz
AIDE stable manual: http://aide.sourceforge.net/stable/manual.html
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.
This Benchmark recommendation maps to:
Red Hat Enterprise Linux 7 Security Technical Implementation Guide:
Version 2, Release: 3 Benchmark Date: 26 Apr 2019
Vul ID: V-71975
Rule ID: SV-86599r2_rule
STIG ID: RHEL-07-020040
Severity: CAT II