Cisco ASA Buffer Copy without Checking Size of Input (CVE-2022-20927)

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

include('compat.inc');

if (description)
{
  script_id(506170);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/07");

  script_cve_id("CVE-2022-20927");

  script_name(english:"Cisco ASA Buffer Copy without Checking Size of Input (CVE-2022-20927)");

  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 SSL/TLS client of Cisco Adaptive Security
Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD)
Software could allow an authenticated, remote attacker to cause a
denial of service (DoS) condition on an affected device. This
vulnerability is due to improper memory management when a device
initiates SSL/TLS connections. An attacker could exploit this
vulnerability by ensuring that the device will connect to an SSL/TLS
server that is using specific encryption parameters. A successful
exploit could allow the attacker to cause the affected device to
unexpectedly reload, resulting in a DoS condition.

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-ssl-client-dos-cCrQPkA
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?99193417");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C");
  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:L/UI:N/S:U/C:N/I:N/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-2022-20927");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(120);

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/11/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/11/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/06");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.13.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.13.1.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.13.1.12");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.13.1.13");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.13.1.16");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.13.1.19");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.13.1.2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.13.1.21");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.13.1.7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.1.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.1.15");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.1.19");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.1.30");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.2.13");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.2.15");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.2.4");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.2.8");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.3.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.3.11");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.3.13");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.3.15");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.3.18");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.14.3.9");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.15.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.15.1.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.15.1.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.15.1.15");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.15.1.16");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.15.1.17");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.15.1.21");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:adaptive_security_appliance_software:9.15.1.7");
  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) 2026 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:adaptive_security_appliance_software:9.13.1" :
        {"versionEndIncluding" : "9.13.1", "versionStartIncluding" : "9.13.1", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.13.1.2" :
        {"versionEndIncluding" : "9.13.1.2", "versionStartIncluding" : "9.13.1.2", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.13.1.7" :
        {"versionEndIncluding" : "9.13.1.7", "versionStartIncluding" : "9.13.1.7", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.13.1.10" :
        {"versionEndIncluding" : "9.13.1.10", "versionStartIncluding" : "9.13.1.10", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.13.1.12" :
        {"versionEndIncluding" : "9.13.1.12", "versionStartIncluding" : "9.13.1.12", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.13.1.13" :
        {"versionEndIncluding" : "9.13.1.13", "versionStartIncluding" : "9.13.1.13", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.13.1.16" :
        {"versionEndIncluding" : "9.13.1.16", "versionStartIncluding" : "9.13.1.16", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.13.1.19" :
        {"versionEndIncluding" : "9.13.1.19", "versionStartIncluding" : "9.13.1.19", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.13.1.21" :
        {"versionEndIncluding" : "9.13.1.21", "versionStartIncluding" : "9.13.1.21", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.1" :
        {"versionEndIncluding" : "9.14.1", "versionStartIncluding" : "9.14.1", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.1.10" :
        {"versionEndIncluding" : "9.14.1.10", "versionStartIncluding" : "9.14.1.10", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.1.15" :
        {"versionEndIncluding" : "9.14.1.15", "versionStartIncluding" : "9.14.1.15", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.1.19" :
        {"versionEndIncluding" : "9.14.1.19", "versionStartIncluding" : "9.14.1.19", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.1.30" :
        {"versionEndIncluding" : "9.14.1.30", "versionStartIncluding" : "9.14.1.30", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.2" :
        {"versionEndIncluding" : "9.14.2", "versionStartIncluding" : "9.14.2", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.2.4" :
        {"versionEndIncluding" : "9.14.2.4", "versionStartIncluding" : "9.14.2.4", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.2.8" :
        {"versionEndIncluding" : "9.14.2.8", "versionStartIncluding" : "9.14.2.8", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.2.13" :
        {"versionEndIncluding" : "9.14.2.13", "versionStartIncluding" : "9.14.2.13", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.2.15" :
        {"versionEndIncluding" : "9.14.2.15", "versionStartIncluding" : "9.14.2.15", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.3" :
        {"versionEndIncluding" : "9.14.3", "versionStartIncluding" : "9.14.3", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.3.1" :
        {"versionEndIncluding" : "9.14.3.1", "versionStartIncluding" : "9.14.3.1", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.3.9" :
        {"versionEndIncluding" : "9.14.3.9", "versionStartIncluding" : "9.14.3.9", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.3.11" :
        {"versionEndIncluding" : "9.14.3.11", "versionStartIncluding" : "9.14.3.11", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.3.13" :
        {"versionEndIncluding" : "9.14.3.13", "versionStartIncluding" : "9.14.3.13", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.3.15" :
        {"versionEndIncluding" : "9.14.3.15", "versionStartIncluding" : "9.14.3.15", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.14.3.18" :
        {"versionEndIncluding" : "9.14.3.18", "versionStartIncluding" : "9.14.3.18", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.15.1" :
        {"versionEndIncluding" : "9.15.1", "versionStartIncluding" : "9.15.1", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.15.1.1" :
        {"versionEndIncluding" : "9.15.1.1", "versionStartIncluding" : "9.15.1.1", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.15.1.7" :
        {"versionEndIncluding" : "9.15.1.7", "versionStartIncluding" : "9.15.1.7", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.15.1.10" :
        {"versionEndIncluding" : "9.15.1.10", "versionStartIncluding" : "9.15.1.10", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.15.1.15" :
        {"versionEndIncluding" : "9.15.1.15", "versionStartIncluding" : "9.15.1.15", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.15.1.16" :
        {"versionEndIncluding" : "9.15.1.16", "versionStartIncluding" : "9.15.1.16", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.15.1.17" :
        {"versionEndIncluding" : "9.15.1.17", "versionStartIncluding" : "9.15.1.17", "family" : "CiscoFirepower"},
    "cpe:/o:cisco:adaptive_security_appliance_software:9.15.1.21" :
        {"versionEndIncluding" : "9.15.1.21", "versionStartIncluding" : "9.15.1.21", "family" : "CiscoFirepower"}
};

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