Cisco Adaptive Security Appliance (ASA) Software IKEv2 Multiple Vulnerabilities (cisco-sa-asa-ftd-ios-dos-DOESHWHy)

#TRUSTED 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
#TRUST-RSA-SHA256 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
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(331353);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/31");

  script_cve_id(
    "CVE-2025-20224",
    "CVE-2025-20225",
    "CVE-2025-20239",
    "CVE-2025-20252",
    "CVE-2025-20253",
    "CVE-2025-20254"
  );
  script_xref(name:"CISCO-BUG-ID", value:"CSCwn73399");
  script_xref(name:"CISCO-BUG-ID", value:"CSCwn83263");
  script_xref(name:"CISCO-BUG-ID", value:"CSCwo15021");
  script_xref(name:"CISCO-BUG-ID", value:"CSCwo15022");
  script_xref(name:"CISCO-BUG-ID", value:"CSCwo15023");
  script_xref(name:"CISCO-BUG-ID", value:"CSCwo15024");
  script_xref(name:"CISCO-BUG-ID", value:"CSCwo15026");
  script_xref(name:"CISCO-BUG-ID", value:"CSCwo20388");
  script_xref(name:"CISCO-BUG-ID", value:"CSCwo49928");
  script_xref(name:"CISCO-BUG-ID", value:"CSCwo49948");
  script_xref(name:"CISCO-SA", value:"cisco-sa-asa-ftd-ios-dos-DOESHWHy");
  script_xref(name:"IAVA", value:"2025-A-0612");

  script_name(english:"Cisco Adaptive Security Appliance (ASA) Software IKEv2 Multiple Vulnerabilities (cisco-sa-asa-ftd-ios-dos-DOESHWHy)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version, Cisco ASA Software is affected by multiple vulnerabilities.

  - A vulnerability in the IKEv2 feature of Cisco IOS Software, IOS XE Software, Secure Firewall ASA
    Software, and Secure FTD Software could allow an unauthenticated, remote attacker to cause the device to
    reload, resulting in a DoS condition. This vulnerability is due to the improper processing of IKEv2
    packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected
    device. A successful exploit could allow the attacker to cause an infinite loop that exhausts resources
    and could cause the device to reload. (CVE-2025-20253)

  - A vulnerability in the Internet Key Exchange Version 2 (IKEv2) feature of Cisco IOS Software, IOS XE
    Software, Secure Firewall Adaptive Security Appliance (ASA) Software, and Secure Firewall Threat Defense
    (FTD) Software could allow an unauthenticated, remote attacker to trigger a memory leak, resulting in a
    denial of service (DoS) condition. This vulnerability is due to a lack of proper processing of IKEv2
    packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected
    device. In the case of Cisco IOS and IOS XE Software, a successful exploit could allow the attacker to
    cause the device to reload unexpectedly. In the case of Cisco ASA and FTD Software, a successful exploit
    could allow the attacker to partially exhaust system memory, causing system instability such as being
    unable to establish new IKEv2 VPN sessions. A manual reboot of the device is required to recover from
    this condition. (CVE-2025-20225, CVE-2025-20239)

  - A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco Secure Firewall Adaptive
    Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD) Software could allow an
    unauthenticated, remote attacker to trigger a memory leak, resulting in a denial of service (DoS)
    condition. This vulnerability is due to improper parsing of IKEv2 packets. An attacker could exploit this
    vulnerability by sending a continuous stream of crafted IKEv2 packets to an affected device. A successful
    exploit could allow the attacker to partially exhaust system memory, causing system instability like being
    unable to establish new IKEv2 VPN sessions. A manual reboot of the device is required to recover from
    this condition. (CVE-2025-20224, CVE-2025-20252, CVE-2025-20254)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.");
  # https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-ios-dos-DOESHWHy
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?13cf09e9");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwn73399");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwn83263");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwo15021");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwo15022");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwo15023");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwo15024");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwo15026");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwo20388");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwo49928");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwo49948");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCwn83263, CSCwo15021, CSCwo15022,
CSCwo15023, CSCwo15024, CSCwo15026");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-20239");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2025-20239");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/08/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/08/20");
  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:cisco:adaptive_security_appliance_software");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CISCO");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/Cisco/ASA/model");

  exit(0);
}

include('ccf.inc');
include('cisco_workarounds.inc');

var product_info = cisco::get_product_info(name:'Cisco Adaptive Security Appliance (ASA) Software');

var vuln_ranges = [
  {'min_ver': '9.8', 'fix_ver': '9.16.4.83'},
  {'min_ver': '9.17', 'fix_ver': '9.18.4.54'},
  {'min_ver': '9.19', 'fix_ver': '9.20.3.14'},
  {'min_ver': '9.22', 'fix_ver': '9.22.1.7'},
  {'min_ver': '9.23', 'fix_ver': '9.23.1.1'}
];

var workarounds = make_list(CISCO_WORKAROUNDS['generic_workaround']);
var workaround_params = WORKAROUND_CONFIG['ikev2_enabled'];

var reporting = make_array(
  'port'    , 0,
  'severity', SECURITY_HOLE,
  'version' , product_info['version'],
  'bug_id'  , 'CSCwn73399, CSCwn83263, CSCwo15021, CSCwo15022, CSCwo15023, CSCwo15024, CSCwo15026, CSCwo20388, CSCwo49928, CSCwo49948',
  'cmds'    , make_list('show running-config')
);

cisco::check_and_report(
  product_info:product_info,
  workarounds:workarounds,
  workaround_params:workaround_params,
  reporting:reporting,
  vuln_ranges:vuln_ranges
);