Erlang/OTP 27.x < 27.3.4.10 / 28.x < 28.4.2 OCSP Certificate Validation Bypass (CVE-2026-32144)

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

include('compat.inc');

if (description)
{
  script_id(305687);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/27");

  script_cve_id("CVE-2026-32144");
  script_xref(name:"IAVA", value:"2026-A-0309");

  script_name(english:"Erlang/OTP 27.x < 27.3.4.10 / 28.x < 28.4.2 OCSP Certificate Validation Bypass (CVE-2026-32144)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by a certificate validation bypass vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Erlang/OTP installed on the remote host is 27.x prior to 27.3.4.10 or 28.x prior to 28.4.2. It is,
therefore, affected by a certificate validation bypass vulnerability:

  - Improper certificate validation in the public_key application's OCSP response validation allows an attacker who
    can intercept or control OCSP responses to forge responses that mark revoked certificates as valid. The OCSP
    response validation does not verify that a CA-designated responder certificate was cryptographically signed by
    the issuing CA, only checking the responder certificate's issuer name and OCSPSigning extended key usage.
    (CVE-2026-32144)

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-gxrm-pf64-99xm");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Erlang/OTP version 27.3.4.10, 28.4.2, or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N");
  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:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-32144");

  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:"2026/04/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/04/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:erlang:erlang%2fotp");
  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("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':'27.0','fixed_version':'27.3.4.10'},
        {'min_version':'28.0','fixed_version':'28.4.2'}
      ]
    }
  ]
};

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