ImageMagick 7.x < 7.1.2-19 Heap Buffer Overflow

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

include('compat.inc');

if (description)
{
  script_id(327614);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/20");

  script_cve_id("CVE-2026-56374");
  script_xref(name:"IAVB", value:"2026-B-0196");

  script_name(english:"ImageMagick 7.x < 7.1.2-19 Heap Buffer Overflow");

  script_set_attribute(attribute:"synopsis", value:
"The remote host has an application installed that is affected by a heap buffer overflow vulnerability.");
  script_set_attribute(attribute:"description", value:
"The remote host has a version of ImageMagick installed that is 7.x prior to 7.1.2-19. It is, therefore, affected by a
heap buffer overflow vulnerability:

  - ImageMagick before 7.1.2-19 contains a heap buffer overflow vulnerability in the FTXT encoder due to missing
    boundary checks when parsing ftxt:format. Remote attackers can trigger an out of bounds read by crafting
    malicious FTXT image files to cause denial of service or information disclosure. (CVE-2026-56374)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-w54j-7wpm-crhj
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c77cc722");
  script_set_attribute(attribute:"solution", value:
"Upgrade to ImageMagick version 7.1.2-19 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/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:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-56374");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/04/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/04/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/17");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:imagemagick:imagemagick");
  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:"Misc.");

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

  script_dependencies("imagemagick_installed.nasl", "imagemagick_macos_installed.nbin", "imagemagick_nix_installed.nbin");
  script_require_keys("installed_sw/ImageMagick");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'checks': [
    {
      'check_algorithm': 'default',
      'product': {'name': 'ImageMagick', 'type': 'app'},
      'constraints': [
        { 'min_version' : '7.0.0', 'fixed_version' : '7.1.2.19', 'fixed_display' : '7.1.2-19' }
      ]
    }
  ]
};

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