RHEL 8 : kernel (RHSA-2024:6753)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2024:6753. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(207389);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/09/18");

  script_cve_id(
    "CVE-2021-47352",
    "CVE-2021-47492",
    "CVE-2022-48687",
    "CVE-2024-26704",
    "CVE-2024-26772",
    "CVE-2024-26773",
    "CVE-2024-27019",
    "CVE-2024-27020",
    "CVE-2024-35898",
    "CVE-2024-41009"
  );
  script_xref(name:"RHSA", value:"2024:6753");

  script_name(english:"RHEL 8 : kernel (RHSA-2024:6753)");

  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-2024:6753 advisory.

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

    Security Fix(es):

    * kernel: ext4: fix double-free of blocks due to wrong extents moved_len (CVE-2024-26704)

    * kernel: ext4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found() (CVE-2024-26773)

    * kernel: ext4: avoid allocating blocks from corrupted group in ext4_mb_find_by_goal() (CVE-2024-26772)

    * kernel: netfilter: nf_tables: Fix potential data-race in __nft_expr_type_get() (CVE-2024-27020)

    * kernel: netfilter: nf_tables: Fix potential data-race in __nft_obj_type_get() (CVE-2024-27019)

    * kernel: ipv6: sr: fix out-of-bounds read when setting HMAC data. (CVE-2022-48687)

    * kernel: netfilter: nf_tables: Fix potential data-race in __nft_flowtable_type_get() (CVE-2024-35898)

    * kernel: virtio-net: Add validation for used length (CVE-2021-47352)

    * kernel: mm, thp: bail out early in collapse_file for writeback page (CVE-2021-47492)

    * kernel: bpf: Fix overrunning reservations in ringbuf (CVE-2024-41009)

    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.

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.");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#moderate");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2273174");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2273236");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2273242");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2278256");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2278258");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2278930");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2281669");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2282401");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2282924");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2298412");
  # https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_6753.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?491a94a9");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2024:6753");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL kernel package based on the guidance in RHSA-2024:6753.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-27020");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(20, 121, 229, 372, 415);
  script_set_attribute(attribute:"vendor_severity", value:"Moderate");

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/09/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/09/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/09/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_aus:8.6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_e4s:8.6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_tus:8.6");
  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");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug-modules-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-headers");
  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-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) 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: 'eq', os_version: os_ver, rhel_version: '8.6')) audit(AUDIT_OS_NOT, 'Red Hat 8.6', '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-2021-47352', 'CVE-2021-47492', 'CVE-2022-48687', 'CVE-2024-26704', 'CVE-2024-26772', 'CVE-2024-26773', 'CVE-2024-27019', 'CVE-2024-27020', 'CVE-2024-35898', 'CVE-2024-41009');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for RHSA-2024:6753');
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

var constraints = [
  {
    'repo_relative_urls': [
      'content/aus/rhel8/8.6/x86_64/baseos/debug',
      'content/aus/rhel8/8.6/x86_64/baseos/os',
      'content/aus/rhel8/8.6/x86_64/baseos/source/SRPMS',
      'content/e4s/rhel8/8.6/aarch64/baseos/debug',
      'content/e4s/rhel8/8.6/aarch64/baseos/os',
      'content/e4s/rhel8/8.6/aarch64/baseos/source/SRPMS',
      'content/e4s/rhel8/8.6/ppc64le/baseos/debug',
      'content/e4s/rhel8/8.6/ppc64le/baseos/os',
      'content/e4s/rhel8/8.6/ppc64le/baseos/source/SRPMS',
      'content/e4s/rhel8/8.6/s390x/baseos/debug',
      'content/e4s/rhel8/8.6/s390x/baseos/os',
      'content/e4s/rhel8/8.6/s390x/baseos/source/SRPMS',
      'content/e4s/rhel8/8.6/x86_64/baseos/debug',
      'content/e4s/rhel8/8.6/x86_64/baseos/os',
      'content/e4s/rhel8/8.6/x86_64/baseos/source/SRPMS',
      'content/tus/rhel8/8.6/x86_64/baseos/debug',
      'content/tus/rhel8/8.6/x86_64/baseos/os',
      'content/tus/rhel8/8.6/x86_64/baseos/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'bpftool-4.18.0-372.123.1.el8_6', 'sp':'6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'bpftool-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.18.0-372.123.1.el8_6', 'sp':'6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-core-4.18.0-372.123.1.el8_6', 'sp':'6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-core-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-cross-headers-4.18.0-372.123.1.el8_6', 'sp':'6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-cross-headers-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-4.18.0-372.123.1.el8_6', 'sp':'6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-core-4.18.0-372.123.1.el8_6', 'sp':'6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-core-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-devel-4.18.0-372.123.1.el8_6', 'sp':'6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-devel-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-modules-4.18.0-372.123.1.el8_6', 'sp':'6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-modules-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-modules-extra-4.18.0-372.123.1.el8_6', 'sp':'6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-modules-extra-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-devel-4.18.0-372.123.1.el8_6', 'sp':'6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-devel-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-headers-4.18.0-372.123.1.el8_6', 'sp':'6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-headers-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-modules-4.18.0-372.123.1.el8_6', 'sp':'6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-modules-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-modules-extra-4.18.0-372.123.1.el8_6', 'sp':'6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-modules-extra-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-4.18.0-372.123.1.el8_6', 'sp':'6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'ppc64le', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'perf-4.18.0-372.123.1.el8_6', 'sp':'6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'perf-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python3-perf-4.18.0-372.123.1.el8_6', 'sp':'6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python3-perf-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    'repo_relative_urls': [
      'content/e4s/rhel8/8.6/aarch64/baseos/debug',
      'content/e4s/rhel8/8.6/aarch64/baseos/os',
      'content/e4s/rhel8/8.6/aarch64/baseos/source/SRPMS',
      'content/e4s/rhel8/8.6/ppc64le/baseos/debug',
      'content/e4s/rhel8/8.6/ppc64le/baseos/os',
      'content/e4s/rhel8/8.6/ppc64le/baseos/source/SRPMS',
      'content/e4s/rhel8/8.6/s390x/baseos/debug',
      'content/e4s/rhel8/8.6/s390x/baseos/os',
      'content/e4s/rhel8/8.6/s390x/baseos/source/SRPMS',
      'content/e4s/rhel8/8.6/x86_64/baseos/debug',
      'content/e4s/rhel8/8.6/x86_64/baseos/os',
      'content/e4s/rhel8/8.6/x86_64/baseos/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'kernel-zfcpdump-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'s390x', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-zfcpdump-core-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'s390x', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-zfcpdump-devel-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'s390x', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-zfcpdump-modules-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'s390x', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-zfcpdump-modules-extra-4.18.0-372.123.1.el8_6', 'sp':'6', 'cpu':'s390x', '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 subscription_caveat = '\n' +
    'NOTE: This vulnerability check contains fixes that apply to\n' +
    'packages only available in the Red Hat Enterprise Linux\n' +
    'Advanced Update Support, Telco Extended Update Support or Update Services for SAP Solutions repositories.\n' +
    'Access to these repositories requires a paid RHEL subscription.\n';
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = subscription_caveat + rpm_report_get() + redhat_report_repo_caveat();
  else extra = subscription_caveat + rpm_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      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');
}