SUSE SLES12 / SLES15 Security Update : kernel (Live Patch 41 for SLE 15 SP3) (SUSE-SU-2024:1207-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2024:1207-1. The text itself
# is copyright (C) SUSE.
##

include('compat.inc');

if (description)
{
  script_id(193245);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/12");

  script_cve_id("CVE-2023-52340");
  script_xref(name:"SuSE", value:"SUSE-SU-2024:1207-1");

  script_name(english:"SUSE SLES12 / SLES15 Security Update : kernel (Live Patch 41 for SLE 15 SP3) (SUSE-SU-2024:1207-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote SUSE Linux SLES12 / SLES15 host has packages installed that are affected by a vulnerability as referenced in
the SUSE-SU-2024:1207-1 advisory.

  - When a router encounters an IPv6 packet too big to transmit to the next-hop, it returns an ICMP6 Packet
    Too Big (PTB) message to the sender. The sender caches this updated Maximum Transmission Unit (MTU) so it
    knows not to exceed this value when subsequently routing to the same host. (CVE-2023-52340)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1219296");
  script_set_attribute(attribute:"see_also", value:"https://lists.suse.com/pipermail/sle-updates/2024-April/034939.html");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-52340");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel-livepatch-5_3_18-150200_24_178-default, kernel-livepatch-5_3_18-150300_59_150-default and /
or kgraft-patch-4_12_14-122_194-default packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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-2023-52340");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2024/01/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/04/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/04/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-livepatch-5_3_18-150200_24_178-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-livepatch-5_3_18-150300_59_150-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kgraft-patch-4_12_14-122_194-default");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"SuSE 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");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");

  exit(0);
}


include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item("Host/SuSE/release");
if (isnull(os_release) || os_release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
var os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'SUSE');
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES12|SLES15)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLES12 / SLES15', 'SUSE (' + os_ver + ')');

var uname_r = get_kb_item("Host/uname-r");
if (empty_or_null(uname_r)) audit(AUDIT_UNKNOWN_APP_VER, "kernel");

if (!get_kb_item("Host/SuSE/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) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'SUSE (' + os_ver + ')', cpu);

var service_pack = get_kb_item("Host/SuSE/patchlevel");
if (isnull(service_pack)) service_pack = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(5)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES12 SP5", os_ver + " SP" + service_pack);
if (os_ver == "SLES15" && (! preg(pattern:"^(2|3)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES15 SP2/3", os_ver + " SP" + service_pack);

var kernel_live_checks = [
  {
    'kernels': {
      '4.12.14-122.194-default': {
        'pkgs': [
          {'reference':'kgraft-patch-4_12_14-122_194-default-3-2.1', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-live-patching-release-12.5']}
        ]
      },
      '5.3.18-150200.24.178-default': {
        'pkgs': [
          {'reference':'kernel-livepatch-5_3_18-150200_24_178-default-4-150200.2.1', 'sp':'2', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-module-live-patching-release-15.2']}
        ]
      },
      '5.3.18-150300.59.150-default': {
        'pkgs': [
          {'reference':'kernel-livepatch-5_3_18-150300_59_150-default-4-150300.2.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-module-live-patching-release-15.3']}
        ]
      }
    }
  }
];

var ltss_caveat_required = FALSE;
var flag = 0;
var kernel_affected = FALSE;
foreach var kernel_array ( kernel_live_checks ) {
  var kpatch_details = kernel_array['kernels'][uname_r];
  if (empty_or_null(kpatch_details)) continue;
  kernel_affected = TRUE;
  foreach var package_array ( kpatch_details['pkgs'] ) {
    var reference = NULL;
    var _release = NULL;
    var sp = NULL;
    var _cpu = NULL;
    var exists_check = NULL;
    var rpm_spec_vers_cmp = NULL;
    if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
    if (!empty_or_null(package_array['release'])) _release = package_array['release'];
    if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
    if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
    if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
    if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
    if (reference && _release) {
      if (exists_check) {
        var check_flag = 0;
        foreach var check (exists_check) {
          if (!rpm_exists(release:_release, rpm:check)) continue;
          check_flag++;
        }
        if (!check_flag) continue;
      }
    }
    if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) flag++;
  }
}

# No kpatch details found for the running kernel version
if (!kernel_affected) audit(AUDIT_INST_VER_NOT_VULN, 'kernel', uname_r);

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'kernel-livepatch-5_3_18-150200_24_178-default / etc');
}