TencentOS Server 3: ruby:2.5 (TSSA-2025:0448)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2025:0448.
##

include('compat.inc');

if (description)
{
  script_id(275945);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/12/04");

  script_cve_id("CVE-2019-19012", "CVE-2021-43809");

  script_name(english:"TencentOS Server 3: ruby:2.5 (TSSA-2025:0448)");

  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 multiple vulnerabilities as referenced in the TSSA-2025:0448 advisory.

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

    CVE-2019-19012:
    An integer overflow in the search_in_range function in regexec.c in Oniguruma 6.x before 6.9.4_rc2 leads
    to an out-of-bounds read, in which the offset of this read is under the control of an attacker. (This only
    affects the 32-bit compiled version). Remote attackers can cause a denial-of-service or information
    disclosure, or possibly have unspecified other impact, via a crafted regular expression.

    CVE-2021-43809:
    Bundler is a package for managing application dependencies in Ruby. In bundler versions before 2.2.33,
    when working with untrusted and apparently harmless Gemfile's, it is not expected that they lead to
    execution of external code, unless that's explicit in the ruby code inside the Gemfile itself. However, if
    the Gemfile includes gem entries that use the git option with invalid, but seemingly harmless, values with
    a leading dash, this can be false. To handle dependencies that come from a Git repository instead of a
    registry, Bundler uses various commands, such as git clone. These commands are being constructed using
    user input (e.g. the repository URL). When building the commands, Bundler versions before 2.2.33 correctly
    avoid Command Injection vulnerabilities by passing an array of arguments instead of a command string.
    However, there is the possibility that a user input starts with a dash (-) and is therefore treated as an
    optional argument instead of a positional one. This can lead to Code Execution because some of the
    commands have options that can be leveraged to run arbitrary executables. Since this value comes from the
    Gemfile file, it can contain any character, including a leading dash.

    To exploit this vulnerability, an attacker has to craft a directory containing a Gemfile file that
    declares a dependency that is located in a Git repository. This dependency has to have a Git URL in the
    form of -u./payload. This URL will be used to construct a Git clone command but will be interpreted as the
    upload-pack argument. Then this directory needs to be shared with the victim, who then needs to run a
    command that evaluates the Gemfile, such as bundle lock, inside.

    This vulnerability can lead to Arbitrary Code Execution, which could potentially lead to the takeover of
    the system. However, the exploitability is very low, because it requires a lot of user interaction.
    Bundler 2.2.33 has patched this problem by inserting -- as an argument before any positional arguments to
    those Git commands that were affected by this issue. Regardless of whether users can upgrade or not, they
    should review any untrustred Gemfile's before running any bundler commands that may read them, since they
    can contain arbitrary ruby code.

Tenable has extracted the preceding description block directly from the Tencent Linux 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://mirrors.tencent.com/tlinux/errata/tssa-20250448.xml");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  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:N/AC:L/PR:N/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-2021-43809");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2019-19012");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/11/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/05/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/11/20");

  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-bson");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:tencent:tencentos_server:rubygem-bundler");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:tencent:tencentos_server:rubygem-mongo");
  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) 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':'ruby-2.5.9-114.module+el8.10.0+745+828827bf', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-2.5.9-114.module+el8.10.0+745+828827bf', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-debuginfo-2.5.9-114.module+el8.10.0+745+828827bf', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-debuginfo-2.5.9-114.module+el8.10.0+745+828827bf', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-debugsource-2.5.9-114.module+el8.10.0+745+828827bf', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-debugsource-2.5.9-114.module+el8.10.0+745+828827bf', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-devel-2.5.9-114.module+el8.10.0+745+828827bf', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-devel-2.5.9-114.module+el8.10.0+745+828827bf', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-doc-2.5.9-114.module+el8.10.0+745+828827bf', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-irb-2.5.9-114.module+el8.10.0+745+828827bf', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-libs-2.5.9-114.module+el8.10.0+745+828827bf', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-libs-2.5.9-114.module+el8.10.0+745+828827bf', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-libs-debuginfo-2.5.9-114.module+el8.10.0+745+828827bf', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ruby-libs-debuginfo-2.5.9-114.module+el8.10.0+745+828827bf', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-abrt-0.3.0-4.module+el8.8.0+556+0441a7bb', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-abrt-doc-0.3.0-4.module+el8.8.0+556+0441a7bb', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bigdecimal-1.3.4-114.module+el8.10.0+745+828827bf', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bigdecimal-1.3.4-114.module+el8.10.0+745+828827bf', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bigdecimal-debuginfo-1.3.4-114.module+el8.10.0+745+828827bf', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bigdecimal-debuginfo-1.3.4-114.module+el8.10.0+745+828827bf', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bson-4.3.0-2.module+el8.8.0+556+0441a7bb', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bson-4.3.0-2.module+el8.8.0+556+0441a7bb', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bson-debuginfo-4.3.0-2.module+el8.8.0+556+0441a7bb', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bson-debuginfo-4.3.0-2.module+el8.8.0+556+0441a7bb', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bson-debugsource-4.3.0-2.module+el8.8.0+556+0441a7bb', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bson-debugsource-4.3.0-2.module+el8.8.0+556+0441a7bb', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bson-doc-4.3.0-2.module+el8.8.0+556+0441a7bb', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bundler-1.16.1-5.module+el8.10.0+745+828827bf', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-bundler-doc-1.16.1-5.module+el8.10.0+745+828827bf', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-did_you_mean-1.2.0-114.module+el8.10.0+745+828827bf', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-io-console-0.4.6-114.module+el8.10.0+745+828827bf', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-io-console-0.4.6-114.module+el8.10.0+745+828827bf', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-io-console-debuginfo-0.4.6-114.module+el8.10.0+745+828827bf', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-io-console-debuginfo-0.4.6-114.module+el8.10.0+745+828827bf', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-json-2.1.0-114.module+el8.10.0+745+828827bf', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-json-2.1.0-114.module+el8.10.0+745+828827bf', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-json-debuginfo-2.1.0-114.module+el8.10.0+745+828827bf', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-json-debuginfo-2.1.0-114.module+el8.10.0+745+828827bf', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-minitest-5.10.3-114.module+el8.10.0+745+828827bf', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-mongo-2.5.1-2.module+el8.8.0+556+0441a7bb', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-mongo-doc-2.5.1-2.module+el8.8.0+556+0441a7bb', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-mysql2-0.4.10-4.module+el8.8.0+556+0441a7bb', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-mysql2-0.4.10-4.module+el8.8.0+556+0441a7bb', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-mysql2-debuginfo-0.4.10-4.module+el8.8.0+556+0441a7bb', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-mysql2-debuginfo-0.4.10-4.module+el8.8.0+556+0441a7bb', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-mysql2-debugsource-0.4.10-4.module+el8.8.0+556+0441a7bb', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-mysql2-debugsource-0.4.10-4.module+el8.8.0+556+0441a7bb', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-mysql2-doc-0.4.10-4.module+el8.8.0+556+0441a7bb', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-net-telnet-0.1.1-114.module+el8.10.0+745+828827bf', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-openssl-2.1.2-114.module+el8.10.0+745+828827bf', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-openssl-2.1.2-114.module+el8.10.0+745+828827bf', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-openssl-debuginfo-2.1.2-114.module+el8.10.0+745+828827bf', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-openssl-debuginfo-2.1.2-114.module+el8.10.0+745+828827bf', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-pg-1.0.0-3.module+el8.8.0+556+0441a7bb', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-pg-1.0.0-3.module+el8.8.0+556+0441a7bb', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-pg-debuginfo-1.0.0-3.module+el8.8.0+556+0441a7bb', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-pg-debuginfo-1.0.0-3.module+el8.8.0+556+0441a7bb', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-pg-debugsource-1.0.0-3.module+el8.8.0+556+0441a7bb', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-pg-debugsource-1.0.0-3.module+el8.8.0+556+0441a7bb', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-pg-doc-1.0.0-3.module+el8.8.0+556+0441a7bb', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-power_assert-1.1.1-114.module+el8.10.0+745+828827bf', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-psych-3.0.2-114.module+el8.10.0+745+828827bf', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-psych-3.0.2-114.module+el8.10.0+745+828827bf', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-psych-debuginfo-3.0.2-114.module+el8.10.0+745+828827bf', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-psych-debuginfo-3.0.2-114.module+el8.10.0+745+828827bf', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-rake-12.3.3-114.module+el8.10.0+745+828827bf', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-rdoc-6.0.1.1-114.module+el8.10.0+745+828827bf', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-test-unit-3.2.7-114.module+el8.10.0+745+828827bf', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygem-xmlrpc-0.3.0-114.module+el8.10.0+745+828827bf', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygems-2.7.6.3-114.module+el8.10.0+745+828827bf', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rubygems-devel-2.7.6.3-114.module+el8.10.0+745+828827bf', '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-debuginfo / ruby-debugsource / etc');
}