RHEL 8 : kernel (RHSA-2020:1372)

##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2020:1372. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(139381);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/04");

  script_cve_id(
    "CVE-2019-15030",
    "CVE-2019-15031",
    "CVE-2019-18660",
    "CVE-2019-19527"
  );
  script_xref(name:"RHSA", value:"2020:1372");

  script_name(english:"RHEL 8 : kernel (RHSA-2020:1372)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for kernel.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2020:1372 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):

    * kernel: powerpc: local user can read vector registers of other users' processes via a Facility
    Unavailable exception (CVE-2019-15030)

    * kernel: powerpc: local user can read vector registers of other users' processes via an interrupt
    (CVE-2019-15031)

    * kernel: powerpc: incomplete Spectre-RSB mitigation leads to information exposure (CVE-2019-18660)

    * kernel: use-after-free caused by a malicious USB device in the drivers/hid/usbhid/hiddev.c driver
    (CVE-2019-19527)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and
    other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * [FJ8.1 Bug]: fs/devpts: always delete dcache dentry-s in dput() (BZ#1783959)

    * qla2xxx: call dma_free_coherent with correct size in all cases in qla24xx_sp_unmap (BZ#1788206)

    * qla2xxxx: Firmware update for Gen7 adapter could result in an unusable adapter (BZ#1790350)

    * s390/sclp: Fix bit checked for has_sipl (BZ#1791408)

    * RHEL8.1 - Error output for CPU-MF auxtrace data in perf: (BZ#1792198)

    * [FJ8.0 Bug]: [kernel]: using kexec -e to reboot A64FX system causes system panic during the boot of
    the 2nd kernel (BZ#1792200)

    * Fixup tlbie vs store ordering issue on POWER9 (BZ#1794058)

    * RHEL8.1 - qeth: add safeguards to RX data path (BZ#1794059)

    * RHEL8.1 - STC940:ZZ:Fleet:RHEL:LPM failed with no rmc connection during 6th iteration (ibmvnic)
    (BZ#1794060)

    * RHEL8.1 - disable trace-imc feature (perf:) (BZ#1794061)

    * [Broadcom RHEL8.2 FEAT]: megaraid_sas driver update request (BZ#1795335)

    * RHEL8.1 pre-Beta - [ FW940 ] [ zz P9 ] kdump fails when XIVE is enabled and dump is trigged from HMC.
    (BZ#1795337)

    * T10 DIF: OOM observed while running I/O (BZ#1795338)

    * backport fix for potential deadlock relative to snapshot COW throttling (BZ#1796490)

    * Neoverse n1 errata 1542419 Core may fetch stale instructions from memory and violate ordering
    (BZ#1797518)

    * [HPE 8.1 Bug] hpsa: bug fix for reset issue (BZ#1797519)

    * [HPE 8.0 BUG] System crash when reading /sys/block/<dm>/mq/0/cpu_list file (BZ#1797960)

    * kernel: T10 CRC not using hardware-accelerated version from crct10dif_pclmul (BZ#1797961)

    * [FJ8.1 Bug]: Dirty pages remain when write() returns ENOSPC. (BZ#1797962)

    * RHEL 8 - NVMe/FC Fabric Broadcom Autoconnect Script Fails to Reconnect after Controller Reset
    (BZ#1798381)

    * [RHEL8.2]: Chelsio crypto co-processor Driver (chcr) bugfixes (BZ#1798527)

    * [RHEL8.1][Snapshot-1]LUN discovery says unrecognized (BZ#1801216)

    * 8.2 snap2 kernel incorrectly signed in brew (BZ#1807231)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://access.redhat.com/security/data/csaf/v2/advisories/2020/rhsa-2020_1372.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?74c3e841");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#moderate");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2020:1372");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1759313");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1760063");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1777825");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1783498");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL kernel package based on the guidance in RHSA-2020:1372.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-19527");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(200, 416);
  script_set_attribute(attribute:"vendor_severity", value:"Moderate");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/09/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/08/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bpftool");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-cross-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-modules-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-tools-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-tools-libs-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-zfcpdump");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-zfcpdump-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-zfcpdump-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-zfcpdump-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-zfcpdump-modules-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python3-perf");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "redhat_repos.nasl", "linux_alt_patch_detect.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm.inc');
include('rhel.inc');
include('ksplice.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '8')) audit(AUDIT_OS_NOT, 'Red Hat 8.x', 'Red Hat ' + os_ver);

if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  rm_kb_item(name:'Host/uptrack-uname-r');
  var cve_list = make_list('CVE-2019-15030', 'CVE-2019-15031', 'CVE-2019-18660', 'CVE-2019-19527');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for RHSA-2020:1372');
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

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      {'reference':'kernel-zfcpdump-core-4.18.0-147.8.1.el8_1', 'cpu':'s390x', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-zfcpdump-devel-4.18.0-147.8.1.el8_1', 'cpu':'s390x', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-zfcpdump-modules-4.18.0-147.8.1.el8_1', 'cpu':'s390x', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-zfcpdump-modules-extra-4.18.0-147.8.1.el8_1', 'cpu':'s390x', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'perf-4.18.0-147.8.1.el8_1', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python3-perf-4.18.0-147.8.1.el8_1', 'release':'8', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);

var flag = 0;
foreach var constraint_array ( constraints ) {
  var repo_relative_urls = NULL;
  if (!empty_or_null(constraint_array['repo_relative_urls'])) repo_relative_urls = constraint_array['repo_relative_urls'];
  foreach var pkg ( constraint_array['pkgs'] ) {
    var reference = NULL;
    var _release = NULL;
    var sp = NULL;
    var _cpu = NULL;
    var el_string = NULL;
    var rpm_spec_vers_cmp = NULL;
    var epoch = NULL;
    var allowmaj = NULL;
    var exists_check = NULL;
    var cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        _release &&
        rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
        (applicable_repo_urls || (!exists_check || rpm_exists(release:_release, rpm:exists_check))) &&
        rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}

if (flag)
{
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = rpm_report_get() + redhat_report_repo_caveat();
  else extra = rpm_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'bpftool / kernel / kernel-core / kernel-cross-headers / etc');
}