Cisco TelePresence Codecs DoS

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

include("compat.inc");

if (description)
{
  script_id(69047);
  script_version("1.7");
  script_cvs_date("Date: 2018/11/15 20:50:20");

  script_cve_id("CVE-2011-2577");
  script_bugtraq_id(49392);

  script_name(english:"Cisco TelePresence Codecs DoS");
  script_summary(english:"Checks software version");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote device is affected by a denial of service vulnerability."
  );
  script_set_attribute(
    attribute:"description",
    value:
"According to the self-reported version returned by the SNMP service on
the remote device, it is affected by a denial of service vulnerability
that can be triggered by sending a specially crafted SIP packet."
  );
  script_set_attribute(attribute:"see_also", value:"https://www.cisco.com/c/en/us/support/docs/csa/cisco-sa-20110831-tandberg.html");
  script_set_attribute(attribute:"solution", value:"Upgrade to the appropriate software version per the vendor's advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2011/08/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/08/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/07/24");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:cisco:telepresence_e20");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:telepresence_mxp_software");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:telepresence_9000_mxp");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:telepresence_6000_mxp");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:telepresence_c_series_software");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:cisco:telepresence_codec_c40");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:cisco:telepresence_codec_c60");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:cisco:telepresence_codec_c90");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:cisco:telepresence_ex90");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:cisco:telepresence_ex60");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2013-2018 Tenable Network Security, Inc.");

 script_dependencies("cisco_telepresence_mcu_detect.nasl");
 script_require_keys("Cisco/TelePresence_MCU/Version");
 exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");

device = get_kb_item_or_exit("Cisco/TelePresence_MCU/Device");
version = get_kb_item_or_exit("Cisco/TelePresence_MCU/Version");

# Affected devices
if (
  device !~ " 6000MXP($|[ \n\r])" && device !~ " 3000MXP($|[ \n\r])" &&
  device !~ " 2000MXP($|[ \n\r])" && device !~ " 1700MXP($|[ \n\r])" &&
  device !~ " 1000MXP($|[ \n\r])" && device !~ " 990MXP($|[ \n\r])"  &&
  device !~ " 880MXP($|[ \n\r])"  && device !~ " 770MXP($|[ \n\r])"  &&
  device !~ " 550MXP($|[ \n\r])"  && device !~ " Edge 75MXP($|[ \n\r])" &&
  device !~ " Edge 85MXP($|[ \n\r])" && device !~ " Edge 95MXP($|[ \n\r])" &&
  device !~ " C20($|[ \n\r])" && device !~ " C40($|[ \n\r])" && device !~ " C60($|[ \n\r])" &&
  device !~ " C90($|[ \n\r])" && device !~ " EX60($|[ \n\r])" && device !~ " EX90($|[ \n\r])")
  exit(0, "The remote TelePresence Device is not affected.");

# check for affected versions
fix = '';
item = eregmatch(pattern: "^TC([0-9.]+)", string: version);
if (
  !isnull(item) &&
  ver_compare(ver:item[1], fix:"4.0.0", strict:FALSE) == -1
)
{
  version = item[0];
  fix = "TC4.0.0";
}
else
{
  item = eregmatch(pattern: "^F([0-9.]+)", string: version);
  if (
    !isnull(item) &&
    ver_compare(ver:item[1], fix:"9.1", strict:FALSE) == -1
  )
  {
    version = item[0];
    fix = "F9.1";
  }
}

if (fix != '')
{
  if (report_verbosity > 0)
  {
    report = '\n  Detected version : ' + version +
             '\n  Fixed version    : ' + fix + '\n';
    security_hole(port:0, extra:report);
  }
  else security_hole(0);
}
else audit(AUDIT_INST_VER_NOT_VULN, "Cisco TelePresence Codecs", version);