Splunk Enterprise < 5.0.17 / 6.0.13 / 6.1.12 / 6.2.12 / 6.3.8 / 6.4.4 or Splunk Light < 6.5.0 Multiple Vulnerabilities - Nessus

Critical Plugin ID: 94932

This page contains detailed information about the Splunk Enterprise < 5.0.17 / 6.0.13 / 6.1.12 / 6.2.12 / 6.3.8 / 6.4.4 or Splunk Light < 6.5.0 Multiple Vulnerabilities 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: 94932
Name: Splunk Enterprise < 5.0.17 / 6.0.13 / 6.1.12 / 6.2.12 / 6.3.8 / 6.4.4 or Splunk Light < 6.5.0 Multiple Vulnerabilities
Filename: splunk_650.nasl
Vulnerability Published: 2014-11-24
This Plugin Published: 2016-11-17
Last Modification Time: 2019-11-14
Plugin Version: 1.9
Plugin Type: remote
Plugin Family: CGI abuses
Dependencies: splunkd_detect.nasl, splunk_web_detect.nasl
Required KB Items [?]: installed_sw/Splunk

Vulnerability Information

Severity: Critical
Vulnerability Published: 2014-11-24
Patch Published: 2016-11-10
CVE [?]: CVE-2016-0772, CVE-2016-5636, CVE-2016-5699
CPE [?]: cpe:/a:splunk:splunk

Synopsis

An application running on the remote web server is affected by multiple vulnerabilities.

Description

According to its self-reported version number, the version of Splunk Enterprise hosted on the remote web server is 5.0.x prior to 5.0.17, 6.0.x prior to 6.0.13, 6.1.x prior to 6.1.12, 6.2.x prior to 6.2.12, 6.3.x prior to 6.3.8, or 6.4.x prior to 6.4.4; or else it is Splunk Light prior to 6.5.0. It is, therefore, affected by multiple vulnerabilities :

- A heap buffer overflow condition exists in Python, specifically in the get_data() function within file Modules/zipimport.c, due to improper validation of user-supplied input. An unauthenticated, remote attacker can exploit this, via negative data size values, to cause a denial of service condition or the possible execution of arbitrary code. (CVE-2016-5636)

- A CRLF injection vulnerability exists in Python, specifically in the HTTPConnection.putheader() function within file Modules/zipimport.c. An unauthenticated, remote attacker can exploit this to inject arbitrary HTTP headers via CRLF sequences in a URL, allowing cross-site scripting (XSS) and other attacks. (CVE-2016-5699)

- A flaw exists in Python within the smtplib library due to a failure to properly raise exceptions when smtp servers are able to negotiate starttls but fail to respond properly. A man-in-the-middle attacker can exploit this issue to bypass TLS protections via a 'StartTLS stripping attack.' (CVE-2016-0772)

- An HTTP request injection vulnerability exists in Splunk that permits leakage of authentication tokens. An unauthenticated, remote attacker can exploit this to access the Splunk REST API with the same rights as the user.

Note that the Python vulnerabilities stated above do not affect the Splunk Enterprise 6.4.x versions, and the HTTP request injection vulnerability does not affect the Splunk Light versions.

Solution

Upgrade Splunk Enterprise to version 5.0.17 / 6.0.13 / 6.1.12 / 6.2.12 / 6.3.8 / 6.4.4 or later, or Splunk Light to version 6.5.0 or later.

Public Exploits

Target Network Port(s): 8000, 8089
Target Asset(s): Services/www
Exploit Available: True (Exploit-DB, GitHub)
Exploit Ease: No exploit is required

Here's the list of publicly known exploits and PoCs for verifying the Splunk Enterprise < 5.0.17 / 6.0.13 / 6.1.12 / 6.2.12 / 6.3.8 / 6.4.4 or Splunk Light < 6.5.0 Multiple Vulnerabilities vulnerability:

Exploit-DB: exploits/multiple/local/43500.txt
[EDB-43500: Python smtplib 2.7.11 / 3.4.4 / 3.5.1 - Man In The Middle StartTLS Stripping]
GitHub: https://github.com/insuyun/CVE-2016-5636
[CVE-2016-5636]
GitHub: https://github.com/mudongliang/LinuxFlaw/tree/master/CVE-2016-5636
[CVE-2016-5636]
GitHub: https://github.com/rsumnerz/vuls
[CVE-2016-5636]
GitHub: https://github.com/xmppadmin/vuls
[CVE-2016-5636]
GitHub: https://github.com/Tiaonmmn/swpuctf_2016_web_web7
[CVE-2016-5699]
GitHub: https://github.com/bunseokbot/CVE-2016-5699-poc
[CVE-2016-5699: PoC code of CVE-2016-5699 Vulnerability]
GitHub: https://github.com/shajinzheng/cve-2016-5699-jinzheng-sha
[CVE-2016-5699: Reading Course Report]

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 V2 Vector [?]: AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:OF/RC:C

CVSS Base Score:	10.0 (High)
Impact Subscore:	10.0
Exploitability Subscore:	10.0
CVSS Temporal Score:	7.8 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	7.8 (High)

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

CVSS Base Score:	9.8 (Critical)
Impact Subscore:	5.9
Exploitability Subscore:	3.9
CVSS Temporal Score:	8.8 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	8.8 (High)

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Plugin Source

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

include("compat.inc");

if (description)
{
  script_id(94932);
  script_version("1.9");
  script_cvs_date("Date: 2019/11/14");

  script_cve_id("CVE-2016-0772", "CVE-2016-5636", "CVE-2016-5699");
  script_bugtraq_id(91225, 91226, 91247);

  script_name(english:"Splunk Enterprise < 5.0.17 / 6.0.13 / 6.1.12 / 6.2.12 / 6.3.8 / 6.4.4 or Splunk Light < 6.5.0 Multiple Vulnerabilities");
  script_summary(english:"Checks the version of Splunk Enterprise and Light.");

  script_set_attribute(attribute:"synopsis", value:
"An application running on the remote web server is affected by
multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the version of Splunk
Enterprise hosted on the remote web server is 5.0.x prior to 5.0.17,
6.0.x prior to 6.0.13, 6.1.x prior to 6.1.12, 6.2.x prior to 6.2.12,
6.3.x prior to 6.3.8, or 6.4.x prior to 6.4.4; or else it is Splunk
Light prior to 6.5.0. It is, therefore, affected by multiple
vulnerabilities :

  - A heap buffer overflow condition exists in Python,
    specifically in the get_data() function within file
    Modules/zipimport.c, due to improper validation of
    user-supplied input. An unauthenticated, remote attacker
    can exploit this, via negative data size values, to
    cause a denial of service condition or the possible
    execution of arbitrary code. (CVE-2016-5636)

  - A CRLF injection vulnerability exists in Python,
    specifically in the HTTPConnection.putheader() function
    within file Modules/zipimport.c. An unauthenticated,
    remote attacker can exploit this to inject arbitrary
    HTTP headers via CRLF sequences in a URL, allowing
    cross-site scripting (XSS) and other attacks.
    (CVE-2016-5699)

  - A flaw exists in Python within the smtplib library due
    to a failure to properly raise exceptions when smtp
    servers are able to negotiate starttls but fail to
    respond properly. A man-in-the-middle attacker can
    exploit this issue to bypass TLS protections via a
    'StartTLS stripping attack.' (CVE-2016-0772)

  - An HTTP request injection vulnerability exists in Splunk
    that permits leakage of authentication tokens. An
    unauthenticated, remote attacker can exploit this to
    access the Splunk REST API with the same rights as the
    user.

Note that the Python vulnerabilities stated above do not affect the
Splunk Enterprise 6.4.x versions, and the HTTP request injection
vulnerability does not affect the Splunk Light versions.");
  script_set_attribute(attribute:"see_also", value:"https://www.splunk.com/view/SP-CAAAPSR");
  script_set_attribute(attribute:"solution", value:
"Upgrade Splunk Enterprise to version 5.0.17 / 6.0.13 / 6.1.12 /
6.2.12 / 6.3.8 / 6.4.4 or later, or Splunk Light to version 6.5.0 or
later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");

  script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2014/11/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/11/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/11/17");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:splunk:splunk");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("splunkd_detect.nasl", "splunk_web_detect.nasl");
  script_require_keys("installed_sw/Splunk");
  script_require_ports("Services/www", 8089, 8000);

  exit(0);
}

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

app = "Splunk";

get_install_count(app_name:app, exit_if_zero:TRUE);

port = get_http_port(default:8000, embedded:TRUE);

install = get_single_install(
  app_name : app,
  port     : port,
  exit_if_unknown_ver : TRUE
);

dir = install['path'];
ver = install['version'];
license = install['License'];
fix = FALSE;

install_url = build_url(qs:dir, port:port);

if (license == "Enterprise")
{
  # 5.0.x < 5.0.17
  if (ver =~ "^5\.0($|[^0-9])")
    fix = '5.0.17';

  # 6.0.x < 6.0.13
  else if (ver =~ "^6\.0($|[^0-9])")
    fix = '6.0.13';

  # 6.1.x < 6.1.12
  else if (ver =~ "^6\.1($|[^0-9])")
    fix = '6.1.12';

  # 6.2.x < 6.2.12
  else if (ver =~ "^6\.2($|[^0-9])")
    fix = '6.2.12';

  # 6.3.x < 6.3.8
  else if (ver =~ "^6\.3($|[^0-9])")
    fix = '6.3.8';

  # 6.4.x < 6.4.4
  else if (ver =~ "^6\.4($|[^0-9])")
    fix = '6.4.4';
}
else if (license == "Light")
{
  # any < 6.5.0
  fix = '6.5.0';
}

if (fix && ver_compare(ver:ver,fix:fix,strict:FALSE) < 0)
{
  order = make_list("URL", "Installed version", "Fixed version");
  report = make_array(
    order[0], install_url,
    order[1], ver + " " + license,
    order[2], fix + " " + license
  );
  report = report_items_str(report_items:report, ordered_fields:order);

  security_report_v4(port:port, extra:report, severity:SECURITY_HOLE);
  exit(0);
}
else audit(AUDIT_WEB_APP_NOT_AFFECTED, app, install_url, ver + " " + license);

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/splunk_650.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\splunk_650.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/splunk_650.nasl

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How to Run

Here is how to run the Splunk Enterprise < 5.0.17 / 6.0.13 / 6.1.12 / 6.2.12 / 6.3.8 / 6.4.4 or Splunk Light < 6.5.0 Multiple Vulnerabilities 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 CGI abuses plugin family.
On the right side table select Splunk Enterprise < 5.0.17 / 6.0.13 / 6.1.12 / 6.2.12 / 6.3.8 / 6.4.4 or Splunk Light < 6.5.0 Multiple Vulnerabilities plugin ID 94932.
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 splunk_650.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a splunk_650.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - splunk_650.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 splunk_650.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID:

91225, 91226, 91247

See also:

Similar and related Nessus plugins:

99134 - macOS 10.12.x < 10.12.4 Multiple Vulnerabilities (httpoxy)
66835 - Splunk 5.0.x < 5.0.3 Multiple Vulnerabilities
79722 - Splunk Enterprise 6.0.x < 6.0.6 Multiple Vulnerabilities
79723 - Splunk Enterprise 6.0.x < 6.0.7 Multiple Vulnerabilities (POODLE)
79724 - Splunk Enterprise 5.0.x < 5.0.10 / 6.1.x < 6.1.4 Multiple Vulnerabilities
83992 - Splunk Enterprise 5.0.x < 5.0.13 / 6.0.x < 6.0.9 / 6.1.x < 6.1.8 OpenSSL Vulnerabilities (FREAK)
81812 - Splunk Enterprise 6.2.x < 6.2.2 Multiple Vulnerabilities (FREAK)
85581 - Splunk Enterprise < 5.0.14 / 6.0.10 / 6.1.9 / 6.2.5 or Splunk Light < 6.2.5 Multiple Vulnerabilities
90705 - Splunk Enterprise < 5.0.15 / 6.0.11 / 6.1.10 / 6.2.9 / 6.3.3.4 or Splunk Light < 6.2.9 / 6.3.3.4 Multiple Vulnerabilities (DROWN)
92790 - Splunk Enterprise < 5.0.16 / 6.0.12 / 6.1.11 / 6.2.11 / 6.3.6 / 6.4.2 or Splunk Light < 6.4.2 Multiple Vulnerabilities
97100 - Splunk Enterprise < 5.0.17 / 6.0.13 / 6.1.12 / 6.2.13 / 6.3.9 / 6.4.5 / 6.5.2 or Splunk Light < 6.5.2 Multiple Vulnerabilities
99235 - Splunk Enterprise < 5.0.18 / 6.0.14 / 6.1.13 / 6.2.13.1 / 6.3.10 / 6.4.6 / 6.5.3 / Splunk Light < 6.5.3 Multiple Vulnerabilities
104850 - Splunk Enterprise 6.3.x < 6.3.12 / 6.4.x < 6.4.9 / 6.5.x < 6.5.6 / 6.6 < 6.6.3.2 or 6.6.4 / 7.0.x < 7.0.0.1 Multiple SAML Implementation Vulnerabilities
158383 - Splunk Enterprise 8.1.x < 8.1.7.2 / 8.2.x < 8.2.3.3 Log4j
121164 - Splunk Information Disclosure Vulnerability (SP-CAAAP5E)
121163 - Splunk Information Exposure (SP-CAAAP5E
79721 - Splunk Enterprise 5.0.x < 5.0.11 Multiple Vulnerabilities (POODLE)
73575 - Splunk 6.x < 6.0.3 Multiple OpenSSL Vulnerabilities (Heartbleed)
76528 - Splunk Enterprise 4.3.x / 5.0.x < 5.0.9 / 6.0.x < 6.0.5 / 6.1.x < 6.1.2 Multiple OpenSSL Vulnerabilities
160471 - Splunk Enterprise 8.1.x < 8.1.7.2 / 8.2.x < 8.2.3.3 Log4j (macOS)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file splunk_650.nasl version 1.9. For more plugins, visit the Nessus Plugin Library.

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Splunk Enterprise < 5.0.17 / 6.0.13 / 6.1.12 / 6.2.12 / 6.3.8 / 6.4.4 or Splunk Light < 6.5.0 Multiple Vulnerabilities - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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