Vulnerabilities > CVE-2017-12234 - Unspecified vulnerability in Cisco IOS

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

include("compat.inc");

if (description)
{
  script_id(103668);
  script_version("1.8");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id("CVE-2017-12233", "CVE-2017-12234");
  script_bugtraq_id(101038);
  script_xref(name:"CISCO-BUG-ID", value:"CSCuz95334");
  script_xref(name:"CISCO-BUG-ID", value:"CSCvc43709");
  script_xref(name:"CISCO-SA", value:"cisco-sa-20170927-cip");

  script_name(english:"Cisco IOS Software CIP Multiple Vulnerabilities (cisco-sa-20170927-cip)");
  script_summary(english:"Checks the IOS version.");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version and configuration, the Cisco
IOS software running on the remote device is affected by multiple
denial of service vulnerabilities in the Common Industrial Protocol
(CIP) feature due to improper processing of unusual but valid CIP
requests. An unauthenticated, remote attacker can exploit this, via
specially crafted CIP requests, to cause the switch to stop processing
traffic, requiring a device restart to regain functionality.");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-cip
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8057e067");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug IDs
CSCuz95334 and CSCvc43709.");
  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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/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:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/09/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/09/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/10/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ios");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("cisco_ios_version.nasl");
  script_require_keys("Host/Cisco/IOS/Version");

  exit(0);
}

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

flag = 0;
override = 0;

ver = get_kb_item_or_exit("Host/Cisco/IOS/Version");

vuln_versions = make_list(
  '15.2(2)EB',
  '15.2(1)EY1',
  '12.4(25e)JAO3a',
  '12.4(25e)JAO20s',
  '15.3(3)JN',
  '15.1(4)M11',
  '15.3(3)SA',
  '15.2(2)E3',
  '12.4(25e)JAP3',
  '12.4(25e)JAO5m',
  '15.1(4)M12',
  '15.2(2)EA1',
  '15.2(2)EA2',
  '15.2(3)EA',
  '15.2(3)EA1',
  '15.2(1)EY2',
  '15.2(2)JA3',
  '15.2(4)JB8',
  '15.3(3)JAX3',
  '15.3(3)JN5',
  '15.4(3)SN2',
  '15.5(2)SN0a',
  '15.2(2)EB1',
  '15.5(3)SN1',
  '15.3(3)JN6',
  '15.3(3)JBB3',
  '15.2(4)EA',
  '15.2(4)EA1',
  '12.4(25e)JAP1n',
  '15.3(3)JBB7',
  '15.3(3)JC30',
  '15.2(3)E2a',
  '15.3(3)JBB6a',
  '15.2(3)EX',
  '15.3(3)JPB',
  '15.2(2)EA3',
  '15.2(2)EB2',
  '15.2(5)E',
  '15.3(3)JNP2',
  '15.6(2)S0a',
  '15.2(4)EA3',
  '15.6(1)S1a',
  '12.4(25e)JAP9',
  '15.2(4)EC',
  '15.1(2)SG7a',
  '15.3(3)JC50',
  '15.3(3)JC51',
  '15.6(2)S2',
  '15.3(3)JN10',
  '15.2(4)EB',
  '15.2(5)EA',
  '15.2(4)EA4',
  '15.2(4)EC1',
  '15.2(4)EA2',
  '15.3(3)JPB2',
  '15.2(4)EA5',
  '15.2(2)E5b',
  '15.2(4)EC2',
  '15.2(5a)E1',
  '15.6(2)SP1b',
  '15.6(2)SP1c',
  '15.2(4a)EA5',
  '15.3(3)JPC3',
  '15.3(3)JDA3',
  '15.3(3)JNC4',
  '15.4(3)M7a',
  '15.6(2)S3',
  '15.3(3)JC7',
  '15.6(2)SP2a',
  '15.3(3)JND2',
  '15.3(3)JCA7',
  '15.0(2)SQD7',
  '15.2(5)E2a',
  '15.2(5)E2b',
  '15.3(3)JE1',
  '15.3(3)JN12'
);

# Check for vuln version
foreach version (vuln_versions)
{
  if (version == ver)
  {
    flag++;
    break;
  }
}

# Check that cip is enabled
if (flag && get_kb_item("Host/local_checks_enabled"))
{
  flag = 0;
  buf = cisco_command_kb_item("Host/Cisco/Config/show_run_|_include_cip",
                              "show run | include cip");
  if (check_cisco_result(buf))
  {
    if (preg(multiline:TRUE, pattern:"cip enable", string:buf))
      flag++;
  }
  else if (cisco_needs_enable(buf))
  {
    flag++;
    override++;
  }
}

if (flag)
{
  security_report_cisco(
    port     : 0,
    severity : SECURITY_HOLE,
    override : override,
    version  : ver,
    bug_id   : 'CSCuz95334 and CSCvc43709',
    cmds     : make_list('show running-config', 'show run | include cip')
  );
}
else audit(AUDIT_INST_VER_NOT_VULN, "Cisco IOS software", ver);