RHEL 9 : kernel live patch module (RHSA-2024:1253)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2024:1253. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(191899);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/17");

  script_cve_id(
    "CVE-2023-2163",
    "CVE-2023-3390",
    "CVE-2023-3609",
    "CVE-2023-4622",
    "CVE-2023-6546",
    "CVE-2024-0646"
  );
  script_xref(name:"RHSA", value:"2024:1253");

  script_name(english:"RHEL 9 : kernel live patch module (RHSA-2024:1253)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for kernel live patch module.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2024:1253 advisory.

    This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify
    the code of a running kernel.

    Security Fix(es):

    * kernel: bpf: Incorrect verifier pruning leads to unsafe code paths being incorrectly marked as safe
    (CVE-2023-2163)

    * kernel: UAF in nftables when nft_set_lookup_global triggered after handling named and anonymous sets in
    batch requests (CVE-2023-3390)

    * kernel: net/sched: cls_u32 component reference counter leak if tcf_change_indev() fails (CVE-2023-3609)

    * kernel: use after free in unix_stream_sendpage (CVE-2023-4622)

    * kernel: ktls overwrites readonly memory pages when using function splice with a ktls socket as
    destination (CVE-2024-0646)

    * kernel: GSM multiplexing race condition leads to privilege escalation (CVE-2023-6546)

    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.");
  # https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_1253.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?605de019");
  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=2213260");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2225201");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2237760");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2240249");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2253908");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2255498");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2024:1253");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL kernel live patch module package based on the guidance in RHSA-2024:1253.");
  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:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-0646");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2023-2163");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_cwe_id(415, 416, 682);
  script_set_attribute(attribute:"vendor_severity", value:"Important");

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/05/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/03/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/03/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_eus:9.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kpatch-patch-5_14_0-70_64_1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kpatch-patch-5_14_0-70_70_1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kpatch-patch-5_14_0-70_75_1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kpatch-patch-5_14_0-70_80_1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kpatch-patch-5_14_0-70_85_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("linux_alt_patch_detect.nasl", "ssh_get_info.nasl", "redhat_repos.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: '9.0')) audit(AUDIT_OS_NOT, 'Red Hat 9.0', '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-2023-2163', 'CVE-2023-3390', 'CVE-2023-3609', 'CVE-2023-4622', 'CVE-2023-6546', 'CVE-2024-0646');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for RHSA-2024:1253');
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}


var kernel_live_checks = [
  {
    'repo_relative_urls': [
      'content/e4s/rhel9/9.0/ppc64le/baseos/debug',
      'content/e4s/rhel9/9.0/ppc64le/baseos/os',
      'content/e4s/rhel9/9.0/ppc64le/baseos/source/SRPMS',
      'content/e4s/rhel9/9.0/x86_64/baseos/debug',
      'content/e4s/rhel9/9.0/x86_64/baseos/os',
      'content/e4s/rhel9/9.0/x86_64/baseos/source/SRPMS',
      'content/eus/rhel9/9.0/ppc64le/baseos/debug',
      'content/eus/rhel9/9.0/ppc64le/baseos/os',
      'content/eus/rhel9/9.0/ppc64le/baseos/source/SRPMS',
      'content/eus/rhel9/9.0/x86_64/baseos/debug',
      'content/eus/rhel9/9.0/x86_64/baseos/os',
      'content/eus/rhel9/9.0/x86_64/baseos/source/SRPMS'
    ],
    'kernels': {
      '5.14.0-70.64.1.el9_0.ppc64le': {
        'pkgs': [
          {'reference':'kpatch-patch-5_14_0-70_64_1-1-6.el9_0', 'sp':'0', 'cpu':'ppc64le', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
        ]
      },
      '5.14.0-70.64.1.el9_0.x86_64': {
        'pkgs': [
          {'reference':'kpatch-patch-5_14_0-70_64_1-1-6.el9_0', 'sp':'0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
        ]
      },
      '5.14.0-70.70.1.el9_0.ppc64le': {
        'pkgs': [
          {'reference':'kpatch-patch-5_14_0-70_70_1-1-5.el9_0', 'sp':'0', 'cpu':'ppc64le', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
        ]
      },
      '5.14.0-70.70.1.el9_0.x86_64': {
        'pkgs': [
          {'reference':'kpatch-patch-5_14_0-70_70_1-1-5.el9_0', 'sp':'0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
        ]
      },
      '5.14.0-70.75.1.el9_0.ppc64le': {
        'pkgs': [
          {'reference':'kpatch-patch-5_14_0-70_75_1-1-4.el9_0', 'sp':'0', 'cpu':'ppc64le', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
        ]
      },
      '5.14.0-70.75.1.el9_0.x86_64': {
        'pkgs': [
          {'reference':'kpatch-patch-5_14_0-70_75_1-1-4.el9_0', 'sp':'0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
        ]
      },
      '5.14.0-70.80.1.el9_0.ppc64le': {
        'pkgs': [
          {'reference':'kpatch-patch-5_14_0-70_80_1-1-3.el9_0', 'sp':'0', 'cpu':'ppc64le', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
        ]
      },
      '5.14.0-70.80.1.el9_0.x86_64': {
        'pkgs': [
          {'reference':'kpatch-patch-5_14_0-70_80_1-1-3.el9_0', 'sp':'0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
        ]
      },
      '5.14.0-70.85.1.el9_0.ppc64le': {
        'pkgs': [
          {'reference':'kpatch-patch-5_14_0-70_85_1-1-2.el9_0', 'sp':'0', 'cpu':'ppc64le', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
        ]
      },
      '5.14.0-70.85.1.el9_0.x86_64': {
        'pkgs': [
          {'reference':'kpatch-patch-5_14_0-70_85_1-1-2.el9_0', 'sp':'0', 'cpu':'x86_64', 'release':'9', '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-5_14_0-70_64_1 / kpatch-patch-5_14_0-70_70_1 / etc');
}