CentOS Linux 6 [TuxCare] Security Update: kernel / kernel-abi-whitelists / kernel-debug / kernel-debug-devel / etc Multiple Vulnerabilities (CENTOS6:CLSA-2026:1789960079)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(352720);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/30");

  script_cve_id(
    "CVE-2018-10878",
    "CVE-2018-14734",
    "CVE-2019-15117",
    "CVE-2019-18675",
    "CVE-2019-19039",
    "CVE-2019-19377",
    "CVE-2019-19816",
    "CVE-2022-49114",
    "CVE-2022-50185",
    "CVE-2023-2162",
    "CVE-2023-52922",
    "CVE-2023-52974",
    "CVE-2025-71075",
    "CVE-2026-23243",
    "CVE-2026-23281",
    "CVE-2026-23455",
    "CVE-2026-31402",
    "CVE-2026-31408",
    "CVE-2026-43037",
    "CVE-2026-43050",
    "CVE-2026-43088",
    "CVE-2026-43116",
    "CVE-2026-43190",
    "CVE-2026-43198",
    "CVE-2026-43427",
    "CVE-2026-45942",
    "CVE-2026-46116",
    "CVE-2026-46266",
    "CVE-2026-52920",
    "CVE-2026-52986",
    "CVE-2026-52998",
    "CVE-2026-53059",
    "CVE-2026-53131",
    "CVE-2026-53186",
    "CVE-2026-53224",
    "CVE-2026-53246",
    "CVE-2026-53253",
    "CVE-2026-53254",
    "CVE-2026-53256",
    "CVE-2026-53268",
    "CVE-2026-53275",
    "CVE-2026-64114",
    "CVE-2026-64271",
    "CVE-2026-64323",
    "CVE-2026-64341",
    "CVE-2026-64342",
    "CVE-2026-64343",
    "CVE-2026-64344",
    "CVE-2026-64348",
    "CVE-2026-68121",
    "CVE-2026-68143",
    "CVE-2026-68144",
    "CVE-2026-68188",
    "CVE-2026-68376",
    "CVE-2026-68413",
    "CVE-2026-68425"
  );
  script_xref(name:"CLSA", value:"2026:1789960079");

  script_name(english:"CentOS Linux 6 [TuxCare] Security Update: kernel / kernel-abi-whitelists / kernel-debug / kernel-debug-devel / etc Multiple Vulnerabilities (CENTOS6:CLSA-2026:1789960079)");

  script_set_attribute(attribute:"synopsis", value:
"The CentOS Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The CentOS Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the
TuxCare CENTOS6:CLSA-2026:1789960079 advisory.

  - A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause an out-of-bounds write and
    a denial of service or unspecified other impact is possible by mounting and operating a crafted ext4
    filesystem image. (CVE-2018-10878)

  - drivers/infiniband/core/ucma.c in the Linux kernel through 4.17.11 allows ucma_leave_multicast to access a
    certain data structure after a cleanup step in ucma_process_join, which allows attackers to cause a denial
    of service (use-after-free). (CVE-2018-14734)

  - parse_audio_mixer_unit in sound/usb/mixer.c in the Linux kernel through 5.2.9 mishandles a short
    descriptor, leading to out-of-bounds memory access. (CVE-2019-15117)

  - The Linux kernel through 5.3.13 has a start_offset+size Integer Overflow in cpia2_remap_buffer in
    drivers/media/usb/cpia2/cpia2_core.c because cpia2 has its own mmap implementation. This allows local
    users (with /dev/video0 access) to obtain read and write permissions on kernel physical pages, which can
    possibly result in a privilege escalation. (CVE-2019-18675)

  - __btrfs_free_extent in fs/btrfs/extent-tree.c in the Linux kernel through 5.3.12 calls btrfs_print_leaf in
    a certain ENOENT case, which allows local users to obtain potentially sensitive information about register
    values via the dmesg program. NOTE: The BTRFS development team disputes this issues as not being a
    vulnerability because 1) The kernel provide facilities to restrict access to dmesg - dmesg_restrict=1
    sysctl option. So it's really up to the system administrator to judge whether dmesg access shall be
    disallowed or not. 2) WARN/WARN_ON are widely used macros in the linux kernel. If this CVE is considered
    valid this would mean there are literally thousands CVE lurking in the kernel - something which clearly is
    not the case. (CVE-2019-19039)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://security.tuxcare.com/csaf/v2/els_os/centos6els/advisories/2026/clsa-2026_1789960079.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3b8ecf32");
  script_set_attribute(attribute:"see_also", value:"https://cve.tuxcare.com/els/releases/CLSA-2026:1789960079");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages based on the guidance in TuxCare advisory CENTOS6:CLSA-2026:1789960079.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:L/AC:L/PR:L/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-2019-19816");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-64348");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/05/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/30");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl");
  script_require_keys("Host/OS/extended-third-party", "Host/local_checks_enabled", "Host/CentOS/release", "Host/CentOS/rpm-list");

  exit(0);
}
include('rpm2.inc');

var third_party_support = get_kb_item('Host/OS/extended-third-party');
if (empty_or_null(third_party_support) || third_party_support != 'TuxCare') exit(0, 'TuxCare support not enabled.');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_product = get_kb_item('installed_os/local/SSH/0/product');
if (isnull(os_product) || 'CentOS Linux' >!< os_product) audit(AUDIT_OS_NOT, 'CentOS Linux');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'CentOS Linux');
if (! preg(pattern:"^6([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'CentOS Linux 6', 'CentOS Linux ' + os_version);

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

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


var constraints = [
  {
    'release': '6',
    'pkgs': [
      {'reference':'kernel-2.6.32-754.35.8.el6.tuxcare.els35', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-abi-whitelists-2.6.32-754.35.8.el6.tuxcare.els35', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-2.6.32-754.35.8.el6.tuxcare.els35', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-devel-2.6.32-754.35.8.el6.tuxcare.els35', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-devel-2.6.32-754.35.8.el6.tuxcare.els35', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-devel-2.6.32-754.35.8.el6.tuxcare.els35', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-firmware-2.6.32-754.35.8.el6.tuxcare.els35', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-headers-2.6.32-754.35.8.el6.tuxcare.els35', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'perf-2.6.32-754.35.8.el6.tuxcare.els35', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python-perf-2.6.32-754.35.8.el6.tuxcare.els35', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

var os_release = get_one_kb_item('installed_os/local/SSH/0/release');
var os_sp = get_one_kb_item('Host/*/minor_release');

var flag = 0;
var reference;
var sp;
var _cpu;
var el_string;
var rpm_spec_vers_cmp;
var epoch;
var allowmaj;
var exists_check;
var cves;
foreach var constraint ( constraints ) {
  # Check that the target release is equal to the affected release
  if (!empty_or_null(constraint['release'])){
    if (constraint['release'] != os_release) continue;
  }
  if (!empty_or_null(constraint['sp'])){
    if (constraint['sp'] != os_sp) continue;
  }
  foreach var pkg ( constraint['pkgs'] ) {
    reference = NULL;
    sp = NULL;
    _cpu = NULL;
    el_string = NULL;
    rpm_spec_vers_cmp = NULL;
    epoch = NULL;
    allowmaj = NULL;
    exists_check = NULL;
    cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    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 &&
        ## (no known rpm to check OR known rpm_exists)
        (!exists_check || rpm_exists(rpm:exists_check)) &&
        rpm_check(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)
{
  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 / kernel-abi-whitelists / kernel-debug / kernel-debug-devel / etc');
}