OpenSSH < 10.1 / 10.1p1 Multiple Vulnerabilities

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

include('compat.inc');

if (description)
{
  script_id(269984);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/30");

  script_cve_id("CVE-2025-61984", "CVE-2025-61985");
  script_xref(name:"IAVA", value:"2025-A-0729-S");
  script_xref(name:"IAVA", value:"2025-A-0806-S");

  script_name(english:"OpenSSH < 10.1 / 10.1p1 Multiple Vulnerabilities");

  script_set_attribute(attribute:"synopsis", value:
"The SSH server running on the remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of OpenSSH installed on the remote host is prior to 10.1. It is, therefore, affected by multiple
vulnerabilities:

  - ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly 
    untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted 
    sources are the command line and %-sequence expansion of a configuration file. (A configuration file 
    that provides a complete literal username is not categorized as an untrusted source.) (CVE-2025-61984)

  - ssh in OpenSSH before 10.1 allows the '\0' character in an ssh:// URI, potentially leading to code execution when a
    ProxyCommand is used. (CVE-2025-61985)

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://www.openssh.com/releasenotes.html#10.1p1");
  script_set_attribute(attribute:"solution", value:
"Upgrade to OpenSSH version 10.1/10.1p1 or later.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:S/C:P/I:P/A:N");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-61984");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/10/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/10/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/10");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:openbsd:openssh");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

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

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

  script_dependencies("openssh_detect.nbin");
  script_require_keys("installed_sw/OpenSSH");
  script_require_ports("Services/ssh", 22);

  exit(0);
}

include('backport.inc');
include('vcf.inc');
include('vcf_extras.inc');

var port = get_service(svc:'ssh', default:22, exit_on_fail:TRUE);
var app_info = vcf::openssh::get_app_info(app:'OpenSSH', port:port);

vcf::check_all_backporting(app_info:app_info);

var constraints = [
  {'fixed_version': '10.1', 'fixed_display': '10.1 / 10.1.p1'}
];

vcf::openssh::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_NOTE);