Package "prelink" Must not be Installed

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Description

The prelink package can be removed with the following command:


 $ apt-get remove prelink

Rationale

The use of the prelink package can interfere with the operation of AIDE since it binaries. Prelinking can also increase damage caused by vulnerability in a common library like libc.

Remediation

Shell script

The following script can be run on the host to remediate the issue.

#!/bin/bash

if [[ -f /usr/sbin/prelink ]];
then
prelink -ua
fi

DEBIAN_FRONTEND=noninteractive apt-get remove -y "prelink"

Ansible playbook

The following playbook can be run with Ansible to remediate the issue.

- name: Check If Prelinked Is Installed
  ansible.builtin.stat:
    path: /usr/sbin/prelink
    get_checksum: false
  register: prelink
  tags:
  - disable_strategy
  - low_disruption
  - medium_complexity
  - medium_severity
  - no_reboot_needed
  - package_prelink_removed

- name: Restore Prelinked Binaries
  ansible.builtin.command:
    cmd: prelink -ua
  when: prelink.stat.exists
  tags:
  - disable_strategy
  - low_disruption
  - medium_complexity
  - medium_severity
  - no_reboot_needed
  - package_prelink_removed

- name: Ensure prelink is Removed
  ansible.builtin.package:
    name: prelink
    state: absent
  tags:
  - disable_strategy
  - low_disruption
  - medium_complexity
  - medium_severity
  - no_reboot_needed
  - package_prelink_removed