AlmaLinux 9 : nodejs:20 (ALSA-2026:7896)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# AlmaLinux Security Advisory ALSA-2026:7896.
##

include('compat.inc');

if (description)
{
  script_id(306647);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/16");

  script_cve_id(
    "CVE-2026-21710",
    "CVE-2026-26996",
    "CVE-2026-27135",
    "CVE-2026-27904"
  );
  script_xref(name:"ALSA", value:"2026:7896");
  script_xref(name:"RHSA", value:"2026:7896");

  script_name(english:"AlmaLinux 9 : nodejs:20 (ALSA-2026:7896)");

  script_set_attribute(attribute:"synopsis", value:
"The remote AlmaLinux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ALSA-2026:7896 advisory.

    * minimatch: minimatch: Denial of Service via specially crafted glob patterns (CVE-2026-26996)
      * minimatch: Minimatch: Denial of Service via catastrophic backtracking in glob expressions
    (CVE-2026-27904)
      * nghttp2: nghttp2: Denial of Service via malformed HTTP/2 frames after session termination
    (CVE-2026-27135)
      * Node.js: Node.js: Denial of Service due to crafted HTTP `__proto__` header (CVE-2026-21710)

Tenable has extracted the preceding description block directly from the AlmaLinux 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://errata.almalinux.org/9/ALSA-2026-7896.html");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2026:7896");
  script_set_attribute(attribute:"solution", value:
"Update the affected 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:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-26996");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(1333, 617, 843);

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/02/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/04/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:nodejs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:nodejs-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:nodejs-docs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:nodejs-full-i18n");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:nodejs-nodemon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:nodejs-packaging");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:nodejs-packaging-bundler");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:npm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::appstream");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::baseos");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::crb");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::highavailability");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::nfv");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::realtime");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::resilientstorage");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::sap");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::sap_hana");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::supplementary");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Alma Linux 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_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AlmaLinux/release", "Host/AlmaLinux/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) || 'AlmaLinux' >!< os_product) audit(AUDIT_OS_NOT, 'AlmaLinux');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'AlmaLinux');
if (! preg(pattern:"^9([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'AlmaLinux 9.x', 'AlmaLinux ' + os_version);

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

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('aarch64' >!< cpu && 'ppc' >!< cpu && 's390' >!< cpu && 'x86_64' >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'AlmaLinux', cpu);

var module_ver = get_kb_item('Host/AlmaLinux/appstream/nodejs');
if (isnull(module_ver)) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module nodejs:20');
if ('20' >!< module_ver) audit(AUDIT_PACKAGE_NOT_AFFECTED, 'Module nodejs:' + module_ver);

var constraints = {
  'nodejs:20': [
    {
      'release': '9',
      'pkgs': [
        {'reference':'nodejs-20.20.2-1.module_el9.7.0+226+88d36870', 'cpu':'aarch64', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
        {'reference':'nodejs-20.20.2-1.module_el9.7.0+226+88d36870', 'cpu':'ppc64le', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
        {'reference':'nodejs-20.20.2-1.module_el9.7.0+226+88d36870', 'cpu':'s390x', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
        {'reference':'nodejs-20.20.2-1.module_el9.7.0+226+88d36870', 'cpu':'x86_64', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
        {'reference':'nodejs-devel-20.20.2-1.module_el9.7.0+224+0af7cc6b', 'cpu':'aarch64', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
        {'reference':'nodejs-devel-20.20.2-1.module_el9.7.0+224+0af7cc6b', 'cpu':'ppc64le', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
        {'reference':'nodejs-devel-20.20.2-1.module_el9.7.0+224+0af7cc6b', 'cpu':'s390x', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
        {'reference':'nodejs-devel-20.20.2-1.module_el9.7.0+224+0af7cc6b', 'cpu':'x86_64', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
        {'reference':'nodejs-docs-20.20.2-1.module_el9.7.0+224+0af7cc6b', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
        {'reference':'nodejs-full-i18n-20.20.2-1.module_el9.7.0+224+0af7cc6b', 'cpu':'aarch64', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
        {'reference':'nodejs-full-i18n-20.20.2-1.module_el9.7.0+224+0af7cc6b', 'cpu':'ppc64le', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
        {'reference':'nodejs-full-i18n-20.20.2-1.module_el9.7.0+224+0af7cc6b', 'cpu':'s390x', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
        {'reference':'nodejs-full-i18n-20.20.2-1.module_el9.7.0+224+0af7cc6b', 'cpu':'x86_64', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
        {'reference':'nodejs-nodemon-3.0.1-1.module_el9.5.0+125+8dc38870', 'el_string':'el9.5.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
        {'reference':'nodejs-packaging-2021.06-6.module_el9.7.0+226+88d36870', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
        {'reference':'nodejs-packaging-bundler-2021.06-6.module_el9.7.0+226+88d36870', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
        {'reference':'npm-10.8.2-1.20.20.2.1.module_el9.7.0+224+0af7cc6b', 'cpu':'aarch64', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
        {'reference':'npm-10.8.2-1.20.20.2.1.module_el9.7.0+224+0af7cc6b', 'cpu':'ppc64le', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
        {'reference':'npm-10.8.2-1.20.20.2.1.module_el9.7.0+224+0af7cc6b', 'cpu':'s390x', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
        {'reference':'npm-10.8.2-1.20.20.2.1.module_el9.7.0+224+0af7cc6b', 'cpu':'x86_64', 'el_string':'el9.7.0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'}
      ]
    }
  ]
};

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;
var appstreams_found = 0;
var appstream;
var appstream_name;
var appstream_version;
foreach var module (keys(constraints)) {
  appstream = NULL;
  appstream_name = NULL;
  appstream_version = NULL;
  appstream_split = split(module, sep:':', keep:FALSE);
  if (!empty_or_null(appstream_split)) {
    appstream_name = appstream_split[0];
    appstream_version = appstream_split[1];
    if (!empty_or_null(appstream_name)) appstream = get_one_kb_item('Host/AlmaLinux/appstream/' + appstream_name);
  }
  if (!empty_or_null(appstream) && appstream_version == appstream || appstream_name == 'all') {
    appstreams_found++;
    foreach var module_array ( constraints[module] ) {
      # Check that the target release is equal to the affected release
      if (!empty_or_null(module_array['release'])){
        if (module_array['release'] != os_release) continue;
      }
      if (!empty_or_null(module_array['sp'])){
        if (module_array['sp'] != os_sp) continue;
      }
      foreach var package_array ( module_array['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(package_array['reference'])) reference = package_array['reference'];
        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['el_string'])) el_string = package_array['el_string'];
        if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
        if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
        if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
        if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
        if (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
        if (reference &&
            (!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 (!appstreams_found) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module nodejs:20');

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, 'nodejs / nodejs-devel / nodejs-docs / nodejs-full-i18n / etc');
}