Suricata 8.x < 8.0.7 Type Confusion (CVE-2026-94083)

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

include('compat.inc');

if (description)
{
  script_id(350171);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/28");

  script_cve_id("CVE-2026-94083");
  script_xref(name:"IAVB", value:"2026-B-0274");

  script_name(english:"Suricata 8.x < 8.0.7 Type Confusion (CVE-2026-94083)");

  script_set_attribute(attribute:"synopsis", value:
"An IDS/IPS solution running on the remote host is affected by a type confusion vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of OISF Suricata installed on the remote host is 8.x prior to 8.0.7. It is, therefore, affected by a
vulnerability:

  - Suricata before 8.0.7 has a DoH2 type confusion that can cause an invalid free, because cleanup code for
    the HTTP2 state is executed even though the actual state is HTTP1 (when there is a DoH2 request with an
    HTTP1 to HTTP2 upgrade). This requires app-layer.protocols.doh2 to be enabled, which is the default in 8.x
    versions. (CVE-2026-94083)

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/OISF/suricata/security/advisories/GHSA-729c-fcmm-j57w
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c4a08d64");
  script_set_attribute(attribute:"see_also", value:"https://forum.suricata.io/t/suricata-8-0-7-released/6467");
  script_set_attribute(attribute:"solution", value:
"Upgrade Suricata to version 8.0.7 or higher.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-94083");

  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:"2026/09/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/25");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:oisf:suricata");
  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("oisf_suricata_win_installed.nbin", "oisf_suricata_nix_installed.nbin");
  script_require_keys("installed_sw/Open Information Security Foundation Suricata");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'requires': [ {'scope': 'target', 'match_one': {'os': ['linux', 'windows'] } } ],
  'checks': [
    {
      'product': {'name': 'Open Information Security Foundation Suricata', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'min_version':'8.0.0', 'fixed_version':'8.0.7'}
      ]
    }
  ]
};

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