Ollama <= 0.9.6 Cross-Domain Token Exposure

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

include('compat.inc');

if (description)
{
  script_id(250293);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/03/13");

  script_cve_id("CVE-2025-51471");
  script_xref(name:"IAVB", value:"2025-B-0137-S");

  script_name(english:"Ollama <= 0.9.6 Cross-Domain Token Exposure");

  script_set_attribute(attribute:"synopsis", value:
"The Ollama instance installed on the remote host is affected by a cross-domain token exposure vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Ollama installed on the remote host is 0.9.6 or earlier. It is, therefore, affected by a vulnerability. 
Cross-Domain Token Exposure in server.auth.getAuthorizationToken in Ollama 0.9.6 allows remote attackers to steal 
authentication tokens and bypass access controls via a malicious realm value in a WWW-Authenticate header returned by 
the /api/pull endpoint.

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://github.com/advisories/GHSA-x9hg-5q6g-q3jr");
  script_set_attribute(attribute:"solution", value:
"See vendor advisory");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:C/I:P/A:N");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-51471");
  script_cwe_id(345, 384);

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/07/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/08/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:ollama:ollama");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Artificial Intelligence");

  script_copyright(english:"This script is Copyright (C) 2025-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ollama_mac_installed.nbin", "ollama_nix_installed.nbin", "ollama_win_installed.nbin", "ollama_web_detect.nbin");
  script_require_keys("installed_sw/Ollama");

  exit(0);
}
include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'checks': [
    {
      'product': {'name': 'Ollama', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {
          'max_version': '0.9.6', 'fixed_display' : 'See vendor advisory'
        }
      ]
    }
  ]
};

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