JetBrains TeamCity < 2025.11.8 / 2026.1.x < 2026.1.4 Multiple Vulnerabilities

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

include('compat.inc');

if (description)
{
  script_id(362481);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/02");

  script_cve_id(
    "CVE-2026-100253",
    "CVE-2026-100254",
    "CVE-2026-100255"
  );
  script_xref(name:"IAVA", value:"2026-A-1065");

  script_name(english:"JetBrains TeamCity < 2025.11.8 / 2026.1.x < 2026.1.4 Multiple Vulnerabilities");

  script_set_attribute(attribute:"synopsis", value:
"The instance of JetBrains TeamCity installed on the remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of JetBrains TeamCity installed on the remote host is prior to 2025.11.8, or 2026.1.x prior to 2026.1.4.
It is, therefore, affected by multiple vulnerabilities:

  - In JetBrains TeamCity before 2026.2, 2026.1.4, 2025.11.8 sandbox escape leading to code execution was
    possible via the versioned settings Kotlin DSL (CVE-2026-100253)

  - In JetBrains TeamCity before 2026.2, 2026.1.4, 2025.11.8 authenticated users could execute commands on
    Windows servers via CRLF injection in Pipeline Git connection settings (CVE-2026-100254)

  - In JetBrains TeamCity before 2026.2, 2026.1.4, 2025.11.8 administrator account takeover was possible via
    password reset (CVE-2026-100255)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://www.jetbrains.com/privacy-security/issues-fixed/?product=TeamCity&version=2026.1.4
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?232e211d");
  script_set_attribute(attribute:"solution", value:
"Upgrade to JetBrains TeamCity version 2025.11.8, 2026.1.4, 2026.2 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-100253");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/09/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/02");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:jetbrains:teamcity");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_set_attribute(attribute:"enable_cgi_scanning", value:"true");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

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

  script_dependencies("jetbrains_teamcity_web_detect.nbin", "jetbrains_teamcity_win_installed.nbin", "jetbrains_teamcity_nix_installed.nbin");
  script_require_keys("installed_sw/JetBrains TeamCity");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  "metadata": {
    "spec_version": "1.0"
  },
  "checks": [
    {
      "product": {
        "name": "JetBrains TeamCity",
        "type": "app"
      },
      "check_algorithm": "default",
      "constraints": [
        {
          "fixed_version": "2025.11.8"
        },
        {
          "min_version": "2026.1",
          "fixed_version": "2026.1.4"
        }
      ]
    }
  ]
};

var vdf_result = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_HOLE);
vdf::handle_check_and_report_errors(vdf_result:vdf_result);