mirror of
https://pagure.io/fedora-docs/quick-docs.git
synced 2024-11-28 14:56:35 +00:00
109 lines
4.2 KiB
Text
109 lines
4.2 KiB
Text
[id='sec-Using-AIDE']
|
|
= Checking Integrity With *AIDE*
|
|
:experimental:
|
|
include::{partialsdir}/unreviewed-message.adoc[]
|
|
include::{partialsdir}/attributes.adoc[]
|
|
|
|
Advanced Intrusion Detection Environment (AIDE) is a utility that creates a database of files on the system, and then uses that database to ensure file integrity and detect system intrusions.
|
|
|
|
== Installing *AIDE*
|
|
|
|
. To install the _aide_ package:
|
|
+
|
|
[source,shell,subs="attributes"]
|
|
----
|
|
$ sudo dnf install aide
|
|
----
|
|
. To generate an initial database:
|
|
+
|
|
[source,shell,subs="attributes"]
|
|
----
|
|
$ sudo aide --init
|
|
Start timestamp: 2018-07-11 12:35:47 +0200 (AIDE 0.16)
|
|
AIDE initialized database at /var/lib/aide/aide.db.new.gz
|
|
|
|
Number of entries: 150666
|
|
|
|
---------------------------------------------------
|
|
The attributes of the (uncompressed) database(s):
|
|
---------------------------------------------------
|
|
|
|
/var/lib/aide/aide.db.new.gz
|
|
MD5 : 0isjEPsCORFk7laoGGz8tQ==
|
|
SHA1 : j0aPLakWChM+TAuxfVIpy9nqBOE=
|
|
RMD160 : nYyyx0AGZj4e5rwcz77afasXFrw=
|
|
TIGER : IBVo5A2A4En1kM6zDjD/MnlkN4QWeSOw
|
|
SHA256 : YveypaI9c5PJNvPSZf8YFfjCMWfGUA8q
|
|
vyqLpLJWY0E=
|
|
SHA512 : TiUYmHYflS3A+j17qw5mW78Fn2yXLpCF
|
|
1LE1/RhiqqtMn1MjkKDrr+3TE+/vWfa4
|
|
7253cDhNmC6hoFndkS67Xw==
|
|
|
|
|
|
End timestamp: 2018-07-11 12:37:35 +0200 (run time: 1m 48s)
|
|
----
|
|
+
|
|
NOTE: In the default configuration, the *aide --init* command checks just a set of directories and files defined in the `/etc/aide.conf` file. To include additional directories or files in the AIDE database, and to change their watched parameters, edit `/etc/aide.conf` accordingly.
|
|
|
|
. To start using the database, remove the `.new` substring from the initial database file name:
|
|
+
|
|
[source,shell,subs="attributes"]
|
|
----
|
|
$ sudo mv /var/lib/aide/aide.db.new.gz /var/lib/aide/aide.db.gz
|
|
----
|
|
|
|
. To change the location of the *AIDE* database, edit the `/etc/aide.conf` file and modify the `DBDIR` value. For additional security, store the database, configuration, and the `/usr/sbin/aide` binary file in a secure location such as a read-only media.
|
|
+
|
|
IMPORTANT: To avoid SELinux denials after the AIDE database location change, update your SELinux policy accordingly. See the link:https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/SELinux_Users_and_Administrators_Guide/[SELinux User's and Administrator's Guide] for more information.
|
|
|
|
== Performing Integrity Checks
|
|
|
|
To initiate a manual check:
|
|
|
|
[source,shell,subs="attributes"]
|
|
----
|
|
$ sudo aide --check
|
|
Start timestamp: 2018-07-11 12:41:20 +0200 (AIDE 0.16)
|
|
AIDE found differences between database and filesystem!!
|
|
|
|
Summary:
|
|
Total number of entries: 150667
|
|
Added entries: 1
|
|
Removed entries: 0
|
|
Changed entries: 2
|
|
|
|
---------------------------------------------------
|
|
Added entries:
|
|
---------------------------------------------------
|
|
|
|
f++++++++++++++++: /etc/cups/subscriptions.conf.O
|
|
...
|
|
[output truncated]
|
|
----
|
|
|
|
At a minimum, *AIDE* should be configured to run a weekly scan. At most, *AIDE* should be run daily. For example, to schedule a daily execution of AIDE at _04:05_ a.m. using the *cron* command, see the xref:{MAJOROSVER}@fedora:system-administrators-guide:monitoring-and-automation/Automating_System_Tasks.adoc[Automating System Tasks] chapter in the System Administrator's Guide.
|
|
|
|
Add the following line to the `/etc/crontab` file:
|
|
|
|
[source,shell,subs="attributes"]
|
|
----
|
|
05 4 * * * root /usr/sbin/aide --check
|
|
----
|
|
|
|
== Updating an *AIDE* Database
|
|
|
|
After verifying the changes of your system such as, package updates or configuration files adjustments, update your baseline *AIDE* database:
|
|
|
|
[source,shell,subs="attributes"]
|
|
----
|
|
$ sudo aide --update
|
|
----
|
|
The *aide --update* command creates the `/var/lib/aide/aide.db.new.gz` database file. To start using it for integrity checks, remove the `.new` substring from the file name.
|
|
|
|
== Additional Resources
|
|
|
|
For additional information on *AIDE*, see the following documentation:
|
|
|
|
- link:https://static.open-scap.org/ssg-guides/ssg-sl7-guide-ospp-rhel7-server.html#xccdf_org.ssgproject.content_group_aide[Guide to the Secure Configuration of Red Hat Enterprise Linux 7 (OpenSCAP Security Guide): Verify Integrity with AIDE]
|
|
|
|
- link:http://aide.sourceforge.net/stable/manual.html[The AIDE manual]
|