Erlang/OTP 25.0 < 27.3.4.15 / 28.0 < 28.5.0.4 / 29.0 < 29.0.4 Heap Corruption (CVE-2026-55737)

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

include('compat.inc');

if (description)
{
  script_id(331348);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/31");

  script_cve_id("CVE-2026-55737");
  script_xref(name:"IAVA", value:"2026-A-0785");

  script_name(english:"Erlang/OTP 25.0 < 27.3.4.15 / 28.0 < 28.5.0.4 / 29.0 < 29.0.4 Heap Corruption (CVE-2026-55737)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The version of Erlang/OTP installed on the remote host is 25.0 prior to 27.3.4.15, 28.0 prior to
28.5.0.4, or 29.0 prior to 29.0.4. It is, therefore, affected by a vulnerability:

  - Signed to Unsigned Conversion Error and Out-of-bounds Write vulnerability in Erlang OTP erts
    allows an attacker who can supply a crafted Erlang external term format (ETF) binary to
    binary_to_term/1 to corrupt the BEAM heap pointer and crash the virtual machine. When decoding a
    LARGE_TUPLE_EXT term, the validation pass reads the 32-bit arity field as unsigned while the
    decode pass reads the same field as a signed 32-bit integer. The result is an out-of-bounds heap
    write; in practice the VM detects an impossible heap size and aborts, denying service.
    (CVE-2026-55737)

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/erlang/otp/security/advisories/GHSA-446w-268v-9462");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Erlang/OTP version 27.3.4.15, 28.5.0.4, or 29.0.4 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-55737");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/07/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/31");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:erlang:erlang%2fotp");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_set_attribute(attribute:"stig_severity", value:"I");
  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("ericcson_erlang_otp_win_installed.nbin", "ericsson_erlang_otp_nix_installed.nbin");
  script_require_keys("installed_sw/Erlang-OTP");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'checks': [
    {
      'product': {'name': 'Erlang-OTP', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'min_version': '25.0', 'fixed_version': '27.3.4.15'},
        {'min_version': '28.0', 'fixed_version': '28.5.0.4'},
        {'min_version': '29.0', 'fixed_version': '29.0.4'}
      ]
    }
  ]
};

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