Cisco TelePresence Server Crafted IPv6 Packet Handling DoS (cisco-sa-20160406-cts)

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(90539);
  script_version("1.6");
  script_cvs_date("Date: 2019/11/20");

  script_cve_id("CVE-2016-1346");
  script_xref(name:"CISCO-BUG-ID", value:"CSCuu46673");
  script_xref(name:"IAVA", value:"2016-A-0094");
  script_xref(name:"CISCO-SA", value:"cisco-sa-20160406-cts");

  script_name(english:"Cisco TelePresence Server Crafted IPv6 Packet Handling DoS (cisco-sa-20160406-cts)");
  script_summary(english:"Checks the software version.");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by a denial of service vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version, the Cisco TelePresence Server
running on the remote host is affected by a denial of service
vulnerability due to improper handling of a specially crafted stream
of IPv6 packets. An unauthenticated, remote attacker can exploit this,
via a specially crafted stream of IPv6 packets, to cause a kernel
panic, resulting in a denial of service condition.");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160406-cts
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d23cd7c2");
  script_set_attribute(attribute:"see_also", value:"https://tools.cisco.com/bugsearch/bug/CSCuu46673");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID
CSCuu46673. Alternatively, apply the workaround as referenced in the
vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/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:H/PR:N/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-2016-1346");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/04/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/04/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/04/15");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:telepresence_server_software");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:cisco:telepresence_server_mse_8710");
  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) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("cisco_telepresence_server_detect.nasl");
  script_require_keys("Cisco/TelePresence_Server/Version", "Cisco/TelePresence_Server/Model");

  exit(0);
}

include("audit.inc");
include("cisco_func.inc");

model    = get_kb_item_or_exit("Cisco/TelePresence_Server/Model");
version  = get_kb_item_or_exit("Cisco/TelePresence_Server/Version");

if (model !~ "^8710([^0-9]|$)")
  audit(AUDIT_HOST_NOT, "a Cisco TelePresence 8710");

# Affects versions 3.0 to 4.2(4.18)
if (
  (cisco_gen_ver_compare(a:version, b:'3.0') >= 0) &&
  (cisco_gen_ver_compare(a:version, b:'4.2(4.18)') <= 0)
)
{
  report = '\n  Installed version : ' + version +
           '\n  Fixed version     : 4.2(4.23)' +
           '\n';
  security_report_v4(port:0, severity:SECURITY_HOLE, extra:report);
}
else audit(AUDIT_INST_VER_NOT_VULN, "Cisco TelePresence Server software", version);