EXOS < 31.7.4 / 32.0.0 < 32.7.4.15 / 33.0.0 < 33.1.100, 33.7.0 < 33.7.1 Privilege Escalation (SA-2026-087)

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

include('compat.inc');

if (description)
{
  script_id(350291);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/25");

  script_cve_id("CVE-2026-8169");

  script_name(english:"EXOS < 31.7.4 / 32.0.0 < 32.7.4.15 / 33.0.0 < 33.1.100, 33.7.0 < 33.7.1 Privilege Escalation (SA-2026-087)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host has a program that is affected by an privilege escalation vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of EXOS installed on the remote host is missing a security update. It is, therefore, affected by 
an privilege escalation vulnerability.

  - ExtremeXOS uses a challenge-response mechanism to authorize access to the privileged debug-mode function. 
    The challenge value can be predicted under certain conditions, allowing an attacker to predict the response 
	and activate debug-mode, potentially allowing privilige escalation to root-level access and persistent 
	modification of the device software stack.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported 
version number.");
  #https://community.extremenetworks.com/t5/security-advisories-formerly/sa-2026-087-extremexos-debug-mode-privilege-escalation-via-weak/ba-p/122155
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e6c410d0");
  script_set_attribute(attribute:"see_also", value:"https://extreme-networks.my.site.com/ExtrArticleDetail?an=000137694");
  script_set_attribute(attribute:"solution", value:
"Upgrade EXOS to 31.7.4, 32.7.4.15, 33.1.100, 33.7.1 or later");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-8169");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/07/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/25");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:extremenetworks:extremexos");
  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("extreme_networks_exos_web_detect.nbin", "extreme_networks_exos.nbin");
  script_require_keys("installed_sw/Extreme Networks ExtremeXOS");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'checks': [
    {
      'product': {'name': 'Extreme Networks ExtremeXOS', 'type': 'os'},
      'check_algorithm': 'default',
      'constraints': [
        {'fixed_version': '31.7.4'},
        {'min_version': '32.0.0', 'fixed_version': '32.7.4.15'},
        {'min_version': '33.0.0', 'fixed_version': '33.1.100'},
        {'min_version': '33.7.0', 'fixed_version': '33.7.1'}
      ]
    }
  ]
};

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