Python Library OpenEXR 3.4.x < 3.4.12 Multiple Vulnerabilities

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

include('compat.inc');

if (description)
{
  script_id(321448);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/03");

  script_cve_id("CVE-2026-44663", "CVE-2026-45696");
  script_xref(name:"IAVA", value:"2026-A-0609");

  script_name(english:"Python Library OpenEXR 3.4.x < 3.4.12 Multiple Vulnerabilities");

  script_set_attribute(attribute:"synopsis", value:
"A Python library installed on the remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of the OpenEXR Python package installed on the remote host is 3.4.x prior to 3.4.12. It is, therefore,
affected by multiple vulnerabilities:

  - An integer overflow in ht_undo_impl() in src/lib/OpenEXRCore/internal_ht.cpp leads to a heap-buffer-overflow when
    decoding a crafted HTJ2K-compressed EXR file. At line 188-189, decode->channels[i].width is multiplied by
    decode->channels[i].bytes_per_element in 32-bit signed arithmetic. When width >= 536870912 with FLOAT channels,
    the product exceeds INT32_MAX, causing signed integer overflow. The overflowed value is stored in
    raster_line_offset and later used as a pointer offset, resulting in an out-of-bounds write past the
    heap-allocated decompression buffer. (CVE-2026-44663)

  - OpenEXR's HTJ2K decoder, ht_undo_impl() in OpenEXRCore, copies decoded pixels out of a per-line OpenJPH buffer
    using the EXR channel's declared width as the iteration count. The codestream embedded in the EXR chunk can
    declare different (smaller) tile/line dimensions than the EXR header advertises, but ht_undo_impl() does not
    validate this. A crafted EXR file produces a 4-byte heap-buffer-overflow READ immediately after a buffer
    allocated by ojph::local::codestream::finalize_alloc(). The result is a deterministic crash (DoS) and potential
    adjacent-heap leak. (CVE-2026-45696)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-777r-f9x8-7r84
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e0f5fa28");
  # https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-gjpj-qv64-vwhf
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?79ebe56f");
  script_set_attribute(attribute:"solution", value:
"Upgrade to OpenEXR version 3.4.12 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/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:N/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-44663");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-45696");

  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:"2026/05/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/05/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/17");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"asset_categories", value:"component");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:academysoftwarefoundation:openexr");
  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("python_packages_installed_nix.nbin", "python_packages_win_installed.nbin");
  script_require_ports("Host/nix/Python/Packages/Enumerated", "Host/win/Python/Packages/Enumerated");

  exit(0);
}

include('python.inc');

var pkg = 'OpenEXR';

var libs = python::get_package_info(pkg_name:pkg, cpe:"cpe:/a:academysoftwarefoundation:openexr");

if (empty_or_null(libs))
  audit(AUDIT_NOT_INST, pkg);

vcf::check_all_backporting(app_info:libs);

var constraints = [
  { 'min_version' : '3.4.0' , 'fixed_version' : '3.4.12' }
];

vcf::check_version_and_report(
  app_info:libs,
  constraints:constraints,
  severity:SECURITY_WARNING
);