TencentOS Server 3: ruby:3.3 (TSSA-2026:1214)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2026:1214.
##

include('compat.inc');

if (description)
{
  script_id(372237);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/27");

  script_cve_id("CVE-2026-80212");

  script_name(english:"TencentOS Server 3: ruby:3.3 (TSSA-2026:1214)");

  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-2026:1214 advisory.

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

    CVE-2026-80212:
    An issue was discovered in the resolv gem before 0.7.2 for Ruby. Resolv::DNS::Resource.get_class,
    Resolv::DNS::Resource::Generic.create, and Resolv::DNS::SvcParam::Generic.create generate a new class for
    each unknown DNS resource record (type, class) pair, or each unknown SvcParamKey, encountered while
    decoding a response. Each generated class was permanently registered both as a constant on Resource (or
    SvcParam::Generic) and as an entry in a class-lookup hash (ClassHash), and thus the class remained
    reachable through that constant after the response was discarded. Type and class are each 16-bit values,
    and thus an attacker controlling DNS responses (a spoofed response, or a malicious or hijacked upstream
    DNS server) has roughly 2^32 distinct (type, class) pairs to choose from. A single response of a few
    hundred kilobytes carrying tens of thousands of distinct unknown types permanently grows process memory by
    tens of megabytes; repeated responses accumulate without bound and are never reclaimed by garbage
    collection, because the constant keeps each class alive. Any code path that calls
    Resolv::DNS::Message.decode on attacker-influenced DNS responses is affected. resolv is a default gem, and
    thus this is reachable from a plain Ruby installation without any additional dependency.

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-20261214.xml");
  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: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-2026-80212");

  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:"2026/08/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/27");

  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:ruby");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:tencent:tencentos_server:rubygem-abrt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:tencent:tencentos_server:rubygem-mysql2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:tencent:tencentos_server:rubygem-pg");
  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) 2026 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':'ruby-3.3.12-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-3.3.12-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-bundled-gems-3.3.12-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-bundled-gems-3.3.12-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-bundled-gems-debuginfo-3.3.12-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-bundled-gems-debuginfo-3.3.12-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-debuginfo-3.3.12-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-debuginfo-3.3.12-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-debugsource-3.3.12-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-debugsource-3.3.12-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-default-gems-3.3.12-9.module+el8.10.0+981+baaeedc8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-devel-3.3.12-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-devel-3.3.12-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-doc-3.3.12-9.module+el8.10.0+981+baaeedc8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-libs-3.3.12-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-libs-3.3.12-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-libs-debuginfo-3.3.12-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-libs-debuginfo-3.3.12-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-abrt-0.4.0-1.module+el8.10.0+741+a1723c19', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-abrt-doc-0.4.0-1.module+el8.10.0+741+a1723c19', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bigdecimal-3.1.5-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bigdecimal-3.1.5-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bigdecimal-debuginfo-3.1.5-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bigdecimal-debuginfo-3.1.5-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bundler-2.5.22-9.module+el8.10.0+981+baaeedc8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-io-console-0.7.1-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-io-console-0.7.1-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-io-console-debuginfo-0.7.1-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-io-console-debuginfo-0.7.1-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-irb-1.13.1-9.module+el8.10.0+981+baaeedc8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-json-2.7.2-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-json-2.7.2-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-json-debuginfo-2.7.2-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-json-debuginfo-2.7.2-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-minitest-5.20.0-9.module+el8.10.0+981+baaeedc8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-mysql2-0.5.5-1.module+el8.10.0+809+e8c4dcf5', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-mysql2-0.5.5-1.module+el8.10.0+809+e8c4dcf5', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-mysql2-debuginfo-0.5.5-1.module+el8.10.0+809+e8c4dcf5', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-mysql2-debuginfo-0.5.5-1.module+el8.10.0+809+e8c4dcf5', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-mysql2-debugsource-0.5.5-1.module+el8.10.0+809+e8c4dcf5', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-mysql2-debugsource-0.5.5-1.module+el8.10.0+809+e8c4dcf5', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-mysql2-doc-0.5.5-1.module+el8.10.0+809+e8c4dcf5', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-pg-1.5.4-1.module+el8.10.0+809+e8c4dcf5', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-pg-1.5.4-1.module+el8.10.0+809+e8c4dcf5', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-pg-debuginfo-1.5.4-1.module+el8.10.0+809+e8c4dcf5', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-pg-debuginfo-1.5.4-1.module+el8.10.0+809+e8c4dcf5', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-pg-debugsource-1.5.4-1.module+el8.10.0+809+e8c4dcf5', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-pg-debugsource-1.5.4-1.module+el8.10.0+809+e8c4dcf5', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-pg-doc-1.5.4-1.module+el8.10.0+809+e8c4dcf5', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-power_assert-2.0.3-9.module+el8.10.0+981+baaeedc8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-psych-5.1.2-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-psych-5.1.2-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-psych-debuginfo-5.1.2-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-psych-debuginfo-5.1.2-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-racc-1.7.3-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-racc-1.7.3-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-racc-debuginfo-1.7.3-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-racc-debuginfo-1.7.3-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-rake-13.1.0-9.module+el8.10.0+981+baaeedc8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-rbs-3.4.0-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-rbs-3.4.0-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-rbs-debuginfo-3.4.0-9.module+el8.10.0+981+baaeedc8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-rbs-debuginfo-3.4.0-9.module+el8.10.0+981+baaeedc8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-rdoc-6.6.3.1-9.module+el8.10.0+981+baaeedc8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-rexml-3.4.4-9.module+el8.10.0+981+baaeedc8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-rss-0.3.1-9.module+el8.10.0+981+baaeedc8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-test-unit-3.6.1-9.module+el8.10.0+981+baaeedc8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-typeprof-0.21.9-9.module+el8.10.0+981+baaeedc8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygems-3.5.22-9.module+el8.10.0+981+baaeedc8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygems-devel-3.5.22-9.module+el8.10.0+981+baaeedc8', '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, 'ruby / ruby-bundled-gems / ruby-bundled-gems-debuginfo / etc');
}