Informix Server GSKit 7.x < 7.0.4.50 / 8.0.50.x < 8.0.50.20 SSL CPU Utilization DoS - Nessus

Medium Plugin ID: 80477

This page contains detailed information about the Informix Server GSKit 7.x < 7.0.4.50 / 8.0.50.x < 8.0.50.20 SSL CPU Utilization DoS Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents

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Plugin Overview
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 80477
Name: Informix Server GSKit 7.x < 7.0.4.50 / 8.0.50.x < 8.0.50.20 SSL CPU Utilization DoS
Filename: ibm_informix_server_swg21673008.nasl
Vulnerability Published: 2014-05-14
This Plugin Published: 2015-01-13
Last Modification Time: 2020-09-18
Plugin Version: 1.7
Plugin Type: local
Plugin Family: Misc.
Dependencies: ibm_gskit_installed.nasl, ibm_informix_server_installed.nasl
Required KB Items [?]: installed_sw/IBM GSKit, installed_sw/IBM Informix Dynamic Server

Vulnerability Information

Severity: Medium
Vulnerability Published: 2014-05-14
Patch Published: 2014-05-01
CVE [?]: CVE-2014-0963
CPE [?]: cpe:/a:ibm:global_security_kit, cpe:/a:ibm:informix_dynamic_server

Synopsis

The remote host has an application that is affected by a denial of service vulnerability.

Description

The remote Informix server ships with a version of IBM's Global Security kit (GSKit) library that is affected by a denial of service vulnerability. A remote attacker can exploit this issue by sending a specially crafted SSL request to cause the host to become unresponsive.

Solution

Upgrade the Informix server or apply the correct GSKit patch per the vendor advisory.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (GitHub)
Exploit Ease: Exploits (PoCs) are available

Here's the list of publicly known exploits and PoCs for verifying the Informix Server GSKit 7.x < 7.0.4.50 / 8.0.50.x < 8.0.50.20 SSL CPU Utilization DoS vulnerability:

GitHub: https://github.com/epsylon/orb
[CVE-2014-0963]

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS Score Source [?]: CVE-2014-0963
CVSS V2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C

CVSS Base Score:	7.1 (High)
Impact Subscore:	6.9
Exploitability Subscore:	8.6
CVSS Temporal Score:	5.3 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	5.3 (Medium)

CVSS V3 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

CVSS Base Score:	5.9 (Medium)
Impact Subscore:	3.6
Exploitability Subscore:	2.2
CVSS Temporal Score:	5.2 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	5.2 (Medium)

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Plugin Source

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

include("compat.inc");

if (description)
{
  script_id(80477);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/09/18");

  script_cve_id("CVE-2014-0963");
  script_bugtraq_id(67238);

  script_name(english:"Informix Server GSKit 7.x < 7.0.4.50 / 8.0.50.x < 8.0.50.20 SSL CPU Utilization DoS");
  script_summary(english:"Checks version of Informix Server and GSKit.");

  script_set_attribute(attribute:"synopsis", value:
"The remote host has an application that is affected by a denial of
service vulnerability.");
  script_set_attribute(attribute:"description", value:
"The remote Informix server ships with a version of IBM's Global
Security kit (GSKit) library that is affected by a denial of service
vulnerability. A remote attacker can exploit this issue by sending a
specially crafted SSL request to cause the host to become
unresponsive.");
  script_set_attribute(attribute:"see_also", value:"https://www-01.ibm.com/support/docview.wss?uid=swg21673008");
  script_set_attribute(attribute:"solution", value:
"Upgrade the Informix server or apply the correct GSKit patch per 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-2014-0963");
  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:"2014/05/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/05/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/01/13");

  script_set_attribute(attribute:"agent", value:"windows");
  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:ibm:global_security_kit");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:ibm:informix_dynamic_server");

  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2015-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ibm_gskit_installed.nasl", "ibm_informix_server_installed.nasl");
  script_require_keys("installed_sw/IBM GSKit", "installed_sw/IBM Informix Dynamic Server");
  exit(0);
}

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

ids_app = 'IBM Informix Dynamic Server';
ids_install = get_single_install(app_name:ids_app, exit_if_unknown_ver:TRUE);

ids_ver   = ids_install['version'];
ids_path  = ids_install['path'];

ids_fix   = NULL;
gsk_regex = NULL;
gsk_fix = NULL;

item = pregmatch(pattern: "[cC]([0-9]+)([^0-9]|$)",
                 string: ids_ver);
c_num = 0;
if (!isnull(item) && !isnull(item[1])) c_num = int(item[1]);

# 11.50 (currently no fix for 11.50 branch)
if (ids_ver =~ "^11\.50($|[^0-9])")
{
  ids_fix     = "None available. Upgrade GSKit.";
  gsk_regex = "^7\.";
  gsk_fix   = '7.0.4.50';
}
# 11.70 < 11.70.xC8
else if (ids_ver =~ "^11\.70($|[^0-9])" && c_num < 8)
{
  ids_fix     = "11.70.xC8";
  gsk_regex = "^8\.0\.50\.";
  gsk_fix   = "8.0.50.20";
}
# 12.10 < 12.10.xC4
else if (ids_ver =~ "^12\.10($|[^0-9])" && c_num < 4)
{
  ids_fix     = "12.10.xC4";
  gsk_regex = "^8\.0\.50\.";
  gsk_fix   = "8.0.50.20";
}
else
  audit(AUDIT_INST_PATH_NOT_VULN, ids_app, ids_ver, ids_path);

# Check GSKit version if Informix is not patched
gsk_app = "IBM GSKit";

# We don't bother to exit if we can't detect any GSKit installations
gsk_installs = get_installs(app_name:gsk_app);
gsk_report   = NULL;
gsk_vuln     = 0;

foreach gsk_install (gsk_installs[1])
{
  gsk_ver  = gsk_install['version'];
  gsk_path = gsk_install['path'];

  if (gsk_ver =~ gsk_regex &&
      ver_compare(ver:gsk_ver, fix:gsk_fix, strict:FALSE) == -1)
  {
    gsk_report +=
      '\n  Path              : ' + gsk_path +
      '\n  Installed version : ' + gsk_ver  +
      '\n  Fixed version     : ' + gsk_fix  +
      '\n';

    gsk_vuln++;
  }
}
port = get_kb_item("SMB/transport");
if (!port) port = 445;

report =
  '\n' + 'The install of ' + ids_app + ' is vulnerable :' +
  '\n' +
  '\n' + '  Path              : ' + ids_path +
  '\n' + '  Installed version : ' + ids_ver  +
  '\n' + '  Fixed version     : ' + ids_fix  +
  '\n';

server_instances = get_kb_item("Host/" + ids_app + "/Server Instances");
if (!empty_or_null(server_instances))
{
  instance_list = split(server_instances, sep:' / ', keep:FALSE);
  report += '  Server instances  : ' + '\n      - ' + join(instance_list, sep:'\n      - ') + '\n';
}

if (!isnull(gsk_report))
{
  instance = " instance "; is_are   = " is ";

  if (gsk_vuln > 1) {instance = " instances "; is_are = " are ";}

  report +=
    '\nAlso, the following vulnerable'+instance+'of '+gsk_app+is_are+'installed on the'+
    '\nremote host :' +
    '\n' +
    gsk_report;
}

security_report_v4(severity:SECURITY_HOLE, port:port, extra:report);

The latest version of this script can be found in these locations depending on your platform:

Linux / Unix:
/opt/nessus/lib/nessus/plugins/ibm_informix_server_swg21673008.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\ibm_informix_server_swg21673008.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/ibm_informix_server_swg21673008.nasl

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How to Run

Here is how to run the Informix Server GSKit 7.x < 7.0.4.50 / 8.0.50.x < 8.0.50.20 SSL CPU Utilization DoS as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select Misc. plugin family.
On the right side table select Informix Server GSKit 7.x < 7.0.4.50 / 8.0.50.x < 8.0.50.20 SSL CPU Utilization DoS plugin ID 80477.
Specify the target on the Settings tab and click to Save the scan.
Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl ibm_informix_server_swg21673008.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a ibm_informix_server_swg21673008.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - ibm_informix_server_swg21673008.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state ibm_informix_server_swg21673008.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID:

67238

See also:

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Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file ibm_informix_server_swg21673008.nasl version 1.7. For more plugins, visit the Nessus Plugin Library.

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Informix Server GSKit 7.x < 7.0.4.50 / 8.0.50.x < 8.0.50.20 SSL CPU Utilization DoS - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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