documentation_complete: true

title: 'Ensure Users Re-Authenticate for Privilege Escalation - sudo'

description: |-
    The sudo <tt>NOPASSWD</tt> and <tt>!authenticate</tt> option, when
    specified, allows a user to execute commands using sudo without having to
    authenticate. This should be disabled by making sure that
    <tt>NOPASSWD</tt> and/or <tt>!authenticate</tt> do not exist in
    <tt>/etc/sudoers</tt> configuration file or any sudo configuration snippets
    in <tt>/etc/sudoers.d/</tt>."

rationale: |-
    Without re-authentication, users may access resources or perform tasks for which they
    do not have authorization.
    <br /><br />
    When operating systems provide the capability to escalate a functional capability, it
    is critical that the user re-authenticate.

severity: medium

identifiers:
    cce@rhel8: CCE-82279-1
    cce@rhel9: CCE-83543-9
    cce@rhel10: CCE-87457-8
    cce@sle15: CCE-85673-2
    cce@slmicro5: CCE-93713-6
    cce@slmicro6: CCE-94716-8

references:
    cis-csc: 1,12,15,16,5
    cobit5: DSS05.04,DSS05.10,DSS06.03,DSS06.10
    isa-62443-2009: 4.3.3.5.1,4.3.3.6.1,4.3.3.6.2,4.3.3.6.3,4.3.3.6.4,4.3.3.6.5,4.3.3.6.6,4.3.3.6.7,4.3.3.6.8,4.3.3.6.9
    isa-62443-2013: 'SR 1.1,SR 1.10,SR 1.2,SR 1.3,SR 1.4,SR 1.5,SR 1.7,SR 1.8,SR 1.9'
    iso27001-2013: A.18.1.4,A.9.2.1,A.9.2.2,A.9.2.3,A.9.2.4,A.9.2.6,A.9.3.1,A.9.4.2,A.9.4.3
    nist: IA-11,CM-6(a)
    nist-csf: PR.AC-1,PR.AC-7
    srg: SRG-OS-000373-GPOS-00156
    stigid@sle15: SLES-15-010450

ocil_clause: 'nopasswd and/or !authenticate is enabled in sudo'

ocil: |-
    To determine if <tt>NOPASSWD</tt> or <tt>!authenticate</tt> have been configured for
    sudo, run the following command:
    <pre>$ sudo grep -ri "nopasswd\|\!authenticate" /etc/sudoers /etc/sudoers.d/</pre>
    The command should return no output.
