Cisco IP Phone 8800 Series SIP DoS Vulnerability (cisco-sa-20170607-sip)

# SPDX-FileCopyrightText: 2017 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106860");
  script_version("2024-07-24T05:06:37+0000");
  script_tag(name:"last_modification", value:"2024-07-24 05:06:37 +0000 (Wed, 24 Jul 2024)");
  script_tag(name:"creation_date", value:"2017-06-08 13:49:55 +0700 (Thu, 08 Jun 2017)");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2017-07-08 01:29:00 +0000 (Sat, 08 Jul 2017)");

  script_cve_id("CVE-2017-6656");

  script_tag(name:"qod_type", value:"remote_banner");

  script_tag(name:"solution_type", value:"VendorFix");

  script_name("Cisco IP Phone 8800 Series SIP DoS Vulnerability (cisco-sa-20170607-sip)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("CISCO");
  script_dependencies("gb_cisco_ip_phone_detect.nasl");
  script_mandatory_keys("cisco/ip_phone/model");

  script_tag(name:"summary", value:"A vulnerability in Session Initiation Protocol (SIP) call
  handling of Cisco IP Phone 8800 Series devices could allow an unauthenticated, remote attacker to
  cause a denial of service (DoS) condition due to the SIP process unexpectedly restarting. All
  active phone calls are dropped as the SIP process restarts.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"The vulnerability is due to incomplete input validation of the
  SIP packet header. An attacker could exploit this vulnerability by sending a malformed SIP packet
  to a targeted phone.");

  script_tag(name:"impact", value:"An exploit could allow the attacker to cause a DoS condition when
  all phone calls are dropped, due to the SIP process unexpectedly restarting.");

  script_tag(name:"solution", value:"See the referenced vendor advisory for a solution.");

  script_xref(name:"URL", value:"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170607-sip");

  exit(0);
}

include("version_func.inc");

if (!model = get_kb_item("cisco/ip_phone/model"))
  exit(0);

if (model =~ "^CP-88..") {
  if (!version = get_kb_item("cisco/ip_phone/version"))
    exit(0);

  version = eregmatch(pattern: "sip88xx\.([0-9-]+)", string: version);
  if (version[1] && version[1] =~ "^11-0-0-1") {
    report = report_fixed_ver(installed_version: version[1], fixed_version: "See advisory");
    security_message(port: 0, data: report);
    exit(0);
  }
}

exit(99);