TencentOS Server 3: nodejs:20 (TSSA-2025:0352)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2025:0352.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(238709);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/12/04");

  script_cve_id("CVE-2025-31498");

  script_name(english:"TencentOS Server 3: nodejs:20 (TSSA-2025:0352)");

  script_set_attribute(attribute:"synopsis", value:
"The remote TencentOS Server 3 host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is,
therefore, affected by a vulnerability as referenced in the TSSA-2025:0352 advisory.

    Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:

    CVE-2025-31498:
    c-ares is an asynchronous resolver library. From 1.32.3 through 1.34.4, there is a use-after-free in
    read_answers() when process_answer() may re-enqueue a query either due to a DNS Cookie Failure or when the
    upstream server does not properly support EDNS, or possibly on TCP queries if the remote closed the
    connection immediately after a response. If there was an issue trying to put that new transaction on the
    wire, it would close the connection handle, but read_answers() was still expecting the connection handle
    to be available to possibly dequeue other responses. In theory a remote attacker might be able to trigger
    this by flooding the target with ICMP UNREACHABLE packets if they also control the upstream nameserver and
    can return a result with one of those conditions, this has been untested. Otherwise only a local attacker
    might be able to change system behavior to make send()/write() return a failure condition. This
    vulnerability is fixed in 1.34.5.

Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.

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://mirrors.tencent.com/tlinux/errata/tssa-20250352.xml");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:P/I:P/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:H/PR:N/UI:N/S:U/C:L/I:L/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-31498");

  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:"2025/05/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/05/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/06/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:tencent:tencentos_server:3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:tencent:tencentos_server:nodejs");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/etc/os-release", "Host/TencentOS/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm2.inc');

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) || 'TencentOS' >!< os_product) audit(AUDIT_OS_NOT, 'TencentOS');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'TencentOS');
if (! preg(pattern:"^3([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'TencentOS 3.x', 'TencentOS ' + os_version);

if (!get_kb_item('Host/TencentOS/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, 'TencentOS', cpu);

var constraints = [
  {
    'release': '3',
    'pkgs': [
      {'reference':'nodejs-20.19.1-1.module+el8.10.0+743+2a079e77', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs-20.19.1-1.module+el8.10.0+743+2a079e77', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs-debuginfo-20.19.1-1.module+el8.10.0+743+2a079e77', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs-debuginfo-20.19.1-1.module+el8.10.0+743+2a079e77', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs-debugsource-20.19.1-1.module+el8.10.0+743+2a079e77', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs-debugsource-20.19.1-1.module+el8.10.0+743+2a079e77', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs-devel-20.19.1-1.module+el8.10.0+743+2a079e77', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs-devel-20.19.1-1.module+el8.10.0+743+2a079e77', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs-docs-20.19.1-1.module+el8.10.0+743+2a079e77', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs-full-i18n-20.19.1-1.module+el8.10.0+743+2a079e77', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs-full-i18n-20.19.1-1.module+el8.10.0+743+2a079e77', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'npm-10.8.2-1.20.19.1.1.module+el8.10.0+743+2a079e77', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'npm-10.8.2-1.20.19.1.1.module+el8.10.0+743+2a079e77', '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_WARNING,
      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, 'nodejs / nodejs-debuginfo / nodejs-debugsource / etc');
}