Cisco IP Phones 7800 and 8800 Series Cisco Discovery Protocol Stack Overflow (CVE-2022-20968)

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

include('compat.inc');

if (description)
{
  script_id(502120);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/18");

  script_cve_id("CVE-2022-20968");

  script_name(english:"Cisco IP Phones 7800 and 8800 Series Cisco Discovery Protocol Stack Overflow (CVE-2022-20968)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"A vulnerability in the Cisco Discovery Protocol processing feature of
Cisco IP Phone 7800 and 8800 Series firmware could allow an
unauthenticated, adjacent attacker to cause a stack overflow on an
affected device. This vulnerability is due to insufficient input
validation of received Cisco Discovery Protocol packets. An attacker
could exploit this vulnerability by sending crafted Cisco Discovery
Protocol traffic to an affected device. A successful exploit could
allow the attacker to cause a stack overflow, resulting in possible
remote code execution or a denial of service (DoS) condition on an
affected device.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  # https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipp-oobwrite-8cMF5r7U
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3896d62b");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-20968");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(787);

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/12/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/12/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/03/18");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:wireless_ip_phone_8821_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_7800_series_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_8800_series_firmware");
  script_set_attribute(attribute:"generated_plugin", value:"former");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Tenable.ot");

  script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("tenable_ot_api_integration.nasl");
  script_require_keys("Tenable.ot/Cisco");

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Cisco');

var asset = tenable_ot::assets::get(vendor:'Cisco');

var vuln_cpes = {
    "cpe:/o:cisco:wireless_ip_phone_8821_firmware" :
        {"versionEndExcluding" : "0", "family" : "CiscoIPPhones"}, # Excluding
    "cpe:/o:cisco:ip_phone_7800_series_firmware" :
        {"versionEndExcluding" : "14.2(1)", "family" : "CiscoIPPhones"},
    "cpe:/o:cisco:ip_phone_8800_series_firmware" :
        {"versionEndExcluding" : "14.2(1)", "family" : "CiscoIPPhones"}
};

tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_HOLE);