documentation_complete: true


title: 'Add noexec Option to /tmp'

description: |-
    The <tt>noexec</tt> mount option can be used to prevent binaries
    from being executed out of <tt>/tmp</tt>.
    {{{ describe_mount(option="noexec", part="/tmp") }}}

rationale: |-
    Allowing users to execute binaries from world-writable directories
    such as <tt>/tmp</tt> should never be necessary in normal operation and
    can expose the system to potential compromise.

{{{ complete_ocil_entry_mount_option("/tmp", "noexec") }}}

severity: medium

identifiers:
    cce@rhel8: CCE-82139-7
    cce@rhel9: CCE-83885-4
    cce@rhel10: CCE-87095-6
    cce@sle12: CCE-91586-8
    cce@sle15: CCE-91272-5
    cce@slmicro5: CCE-94079-1

references:
    cis-csc: 11,13,14,3,8,9
    cis@sle12: 1.1.3
    cis@sle15: 1.1.3
    cobit5: APO13.01,BAI10.01,BAI10.02,BAI10.03,BAI10.05,DSS05.02,DSS05.05,DSS05.06,DSS06.06
    isa-62443-2009: 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.11.2.9,A.12.1.2,A.12.5.1,A.12.6.2,A.14.2.2,A.14.2.3,A.14.2.4,A.8.2.1,A.8.2.2,A.8.2.3,A.8.3.1,A.8.3.3,A.9.1.2
    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.IP-1,PR.PT-2,PR.PT-3
    srg: SRG-OS-000368-GPOS-00154
    stigid@ol8: OL08-00-040125

{{% if product == 'slmicro5' %}}
platform: system_with_kernel
{{% else %}}
platform: mount[tmp]
{{% endif %}}


template:
    name: mount_option
    vars:
        mountpoint: /tmp
        mountoption: noexec
# Note that /tmp on RHEL systems is not tmpfs

fixtext: |-
    {{{ fixtext_mount_option("/tmp", "noexec") }}}

srg_requirement: '{{{ srg_requirement_mount_option("/tmp", "noexec") }}}'