Puppet Class: security_baseline::rules::redhat::sec_prelink

Defined in:
manifests/rules/redhat/sec_prelink.pp

Summary

Ensure prelink is disabled (Scored)

Overview

prelinkis a program that modifies ELF shared libraries and ELF dynamically linked binaries in such a way that the time needed for the dynamic linker to perform relocations at startup significantly decreases.

Rationale: The prelinking feature can interfere with the operation of AIDE, because it changes binaries. Prelinking can also increase the vulnerability of the system if a malicious user is able to compromise a common library such as libc.

Examples:

class security_baseline::rules::redhat::sec_prelink {
    enforce => true,
    message => 'Test',
    log_level => 'info'
}

Parameters:

  • enforce (Boolean) (defaults to: true) —

    Enforce the rule or just test and log

  • message (String) (defaults to: '') —

    Message to print into the log

  • log_level (String) (defaults to: '') —

    The log_level for the above message



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# File 'manifests/rules/redhat/sec_prelink.pp', line 30

class security_baseline::rules::redhat::sec_prelink (
  Boolean $enforce = true,
  String $message = '',
  String $log_level = ''
) {
  if($enforce) {

    if($facts['security_baseline']['packages_installed']['prelink']) {
      ensure_packages(['prelink'], {
        ensure => 'purged',
      })
      exec { 'reset prelink':
        command => 'prelink -ua',
        path    => ['/bin', '/sbin', '/usr/bin', '/usr/sbin'],
        onlyif  => 'test -f /sbin/prelink',
        before  => Package['prelink'],
      }
    }
  } else {
    if($facts['security_baseline']['packages_installed']['prelink']) {
      echo { 'prelink':
        message  => $message,
        loglevel => $log_level,
        withpath => false,
      }
    }
  }
}