documentation_complete: true


title: 'Add noexec Option to Removable Media Partitions'

description: |-
    The <tt>noexec</tt> mount option prevents the direct execution of binaries
    on the mounted filesystem. Preventing the direct execution of binaries from
    removable media (such as a USB key) provides a defense against malicious
    software that may be present on such untrusted media.
    {{{ describe_mount(option="noexec", part="any removable media partitions") }}}

rationale: |-
    Allowing users to execute binaries from removable media such as USB keys exposes
    the system to potential compromise.

severity: medium

identifiers:
    cce@rhcos4: CCE-82747-7
    cce@rhel8: CCE-82746-9
    cce@rhel9: CCE-83883-9
    cce@rhel10: CCE-90378-1
    cce@sle12: CCE-92307-8
    cce@sle15: CCE-92461-3
    cce@slmicro5: CCE-93939-7

references:
    cis-csc: 11,12,13,14,16,3,8,9
    cis@sle12: 1.1.19
    cis@sle15: 1.1.19
    cobit5: APO13.01,BAI10.01,BAI10.02,BAI10.03,BAI10.05,DSS01.04,DSS05.02,DSS05.03,DSS05.04,DSS05.05,DSS05.06,DSS05.07,DSS06.03,DSS06.06
    isa-62443-2009: 4.3.3.2.2,4.3.3.5.1,4.3.3.5.2,4.3.3.5.3,4.3.3.5.4,4.3.3.5.5,4.3.3.5.6,4.3.3.5.7,4.3.3.5.8,4.3.3.6.1,4.3.3.6.2,4.3.3.6.3,4.3.3.6.4,4.3.3.6.5,4.3.3.6.6,4.3.3.6.7,4.3.3.6.8,4.3.3.6.9,4.3.3.7.1,4.3.3.7.2,4.3.3.7.3,4.3.3.7.4,4.3.4.3.2,4.3.4.3.3
    isa-62443-2013: 'SR 1.1,SR 1.10,SR 1.11,SR 1.12,SR 1.13,SR 1.2,SR 1.3,SR 1.4,SR 1.5,SR 1.6,SR 1.7,SR 1.8,SR 1.9,SR 2.1,SR 2.2,SR 2.3,SR 2.4,SR 2.5,SR 2.6,SR 2.7,SR 7.6'
    iso27001-2013: A.11.2.6,A.11.2.9,A.12.1.2,A.12.5.1,A.12.6.2,A.13.1.1,A.13.2.1,A.14.2.2,A.14.2.3,A.14.2.4,A.6.2.1,A.6.2.2,A.7.1.1,A.8.2.1,A.8.2.2,A.8.2.3,A.8.3.1,A.8.3.3,A.9.1.2,A.9.2.1
    nerc-cip: CIP-003-8 R5.1.1,CIP-003-8 R5.3,CIP-004-6 R2.3,CIP-007-3 R2.1,CIP-007-3 R2.2,CIP-007-3 R2.3,CIP-007-3 R5.1,CIP-007-3 R5.1.1,CIP-007-3 R5.1.2
    nist: CM-7(a),CM-7(b),CM-6(a),AC-6,AC-6(1),MP-7
    nist-csf: PR.AC-3,PR.AC-6,PR.IP-1,PR.PT-2,PR.PT-3
    srg: SRG-OS-000480-GPOS-00227
    stigid@ol8: OL08-00-010610

ocil_clause: 'removable media partitions are present'

ocil: |-
    To verify that binaries cannot be directly executed from removable media, run the following command:
    <pre>$ grep -v noexec /etc/fstab</pre>
    The resulting output will show partitions which do not have the <tt>noexec</tt> flag. Verify all partitions
    in the output are not removable media.

fixtext: |-
    Configure the "/etc/fstab" to use the "noexec" option on file systems that are associated with removable media.

srg_requirement: '{{{ full_name }}} must prevent code from being executed on file systems that are used with removable media.'


template:
    name: mount_option_removable_partitions
    vars:
        mountoption: noexec
    backends:
        anaconda: 'off'
