RHEL 8 : kpatch-patch-4_18_0-477_43_1 (RHSA-2024:5520)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2024:5520. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(205777);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/19");

  script_cve_id("CVE-2024-36886", "CVE-2024-36971");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2024/08/28");
  script_xref(name:"RHSA", value:"2024:5520");

  script_name(english:"RHEL 8 : kpatch-patch-4_18_0-477_43_1 (RHSA-2024:5520)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for kpatch-patch-4_18_0-477_43_1.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as
referenced in the RHSA-2024:5520 advisory.

    This is a kernel live patch module which can be loaded by the kpatch command line utility to modify the
    code of a running kernel.  This patch module is targeted for kernel-4.18.0-477.43.1.el8_8.

    Security Fix(es):

    * kernel: TIPC message reassembly use-after-free remote code execution vulnerability (CVE-2024-36886)

    * kernel: net: UAF in network route management (CVE-2024-36971)

    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/#important");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2277238");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2292331");
  # https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_5520.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?468ba514");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2024:5520");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL kpatch-patch-4_18_0-477_43_1 package based on the guidance in RHSA-2024:5520.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-36971");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2024/05/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/08/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/08/19");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_eus:8.8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-477_43_1");
  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: '8.8')) audit(AUDIT_OS_NOT, 'Red Hat 8.8', '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);

var uname_r = get_kb_item("Host/uname-r");
if (empty_or_null(uname_r)) audit(AUDIT_UNKNOWN_APP_VER, "kernel");
if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  rm_kb_item(name:'Host/uptrack-uname-r');
  var cve_list = make_list('CVE-2024-36886', 'CVE-2024-36971');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for RHSA-2024:5520');
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}


var kernel_live_checks = [
  {
    'repo_relative_urls': [
      'content/e4s/rhel8/8.8/ppc64le/baseos/debug',
      'content/e4s/rhel8/8.8/ppc64le/baseos/os',
      'content/e4s/rhel8/8.8/ppc64le/baseos/source/SRPMS',
      'content/e4s/rhel8/8.8/x86_64/baseos/debug',
      'content/e4s/rhel8/8.8/x86_64/baseos/os',
      'content/e4s/rhel8/8.8/x86_64/baseos/source/SRPMS',
      'content/eus/rhel8/8.8/ppc64le/baseos/debug',
      'content/eus/rhel8/8.8/ppc64le/baseos/os',
      'content/eus/rhel8/8.8/ppc64le/baseos/source/SRPMS',
      'content/eus/rhel8/8.8/x86_64/baseos/debug',
      'content/eus/rhel8/8.8/x86_64/baseos/os',
      'content/eus/rhel8/8.8/x86_64/baseos/source/SRPMS',
      'content/tus/rhel8/8.8/x86_64/baseos/debug',
      'content/tus/rhel8/8.8/x86_64/baseos/os',
      'content/tus/rhel8/8.8/x86_64/baseos/source/SRPMS'
    ],
    'kernels': {
      '4.18.0-477.43.1.el8_8.ppc64le': {
        'pkgs': [
          {'reference':'kpatch-patch-4_18_0-477_43_1-1-3.el8_8', 'sp':'8', 'cpu':'ppc64le', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
        ]
      },
      '4.18.0-477.43.1.el8_8.x86_64': {
        'pkgs': [
          {'reference':'kpatch-patch-4_18_0-477_43_1-1-3.el8_8', 'sp':'8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE}
        ]
      }
    }
  }
];

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

var flag = 0;
var kernel_affected = FALSE;
foreach var kernel_array ( kernel_live_checks ) {
  var repo_relative_urls = NULL;
  if (!empty_or_null(kernel_array['repo_relative_urls'])) repo_relative_urls = kernel_array['repo_relative_urls'];
  var kpatch_details = kernel_array['kernels'][uname_r];
  if (empty_or_null(kpatch_details)) continue;
  kernel_affected = TRUE;
  foreach var pkg ( kpatch_details['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++;
  }
}
# No kpatch details found for the running kernel version
if (!kernel_affected) audit(AUDIT_INST_VER_NOT_VULN, 'kernel', uname_r);

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' +
    'Extended Update Support repository.\n' +
    'Access to this repository 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, 'kpatch-patch-4_18_0-477_43_1');
}