iTerm2 < 3.6.10 / < 3.7.0beta1 Arbitrary Code Execution (CVE-2026-41253)

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

include('compat.inc');

if (description)
{
  script_id(307903);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/19");

  script_cve_id("CVE-2026-41253");

  script_name(english:"iTerm2 < 3.6.10 / < 3.7.0beta1 Arbitrary Code Execution (CVE-2026-41253)");

  script_set_attribute(attribute:"synopsis", value:
"An application installed on the remote macOS host is affected by an arbitrary code execution vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of iTerm2 installed on the remote host is prior to 3.6.10, or prior to 3.7.0beta1. It is, therefore,
affected by an arbitrary code execution vulnerability:

  - Displaying a .txt file can cause code execution via DCS 2000p and OSC 135 data, if the working directory contains
    a malicious file whose name is valid output from the conductor encoding path. This occurs because iTerm2 accepts
    the SSH conductor protocol from terminal output that does not originate from a legitimate conductor session.
    (CVE-2026-41253)

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://blog.calif.io/p/mad-bugs-even-cat-readmetxt-is-not");
  script_set_attribute(attribute:"see_also", value:"https://iterm2.com/downloads.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade to iTerm2 version 3.6.10 / 3.7.0beta1 or later.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/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:L/AC:L/PR:N/UI:R/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-2026-41253");

  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:"2026/04/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/04/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:iterm2:iterm2");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"MacOS X Local Security Checks");

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

  script_dependencies("iterm2_macos_installed.nbin");
  script_require_keys("installed_sw/iTerm2", "Host/MacOSX/Version");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'checks': [
    {
      'product': {'name': 'iTerm2', 'type': 'app'},
      'requires': [{'scope': 'target', 'match': {'os': 'macos'}}],
      'check_algorithm': 'default',
      'constraints': [
        {
          'requires': [{'scope': 'install', 'match': {'isBeta': 'is_beta'}}],
          'fixed_version': '3.7.0.1', 'fixed_display': '3.7.0beta1'
        },
        {
          'requires': [{'scope': 'install', 'match': {'isBeta': 'not_beta'}}],
          'fixed_version': '3.6.10'
        }
      ]
    }
  ]
};

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