Splunk Information Exposure (SP-CAAAP5E - Nessus

Medium   Plugin ID: 121163

This page contains detailed information about the Splunk Information Exposure (SP-CAAAP5E 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

ID: 121163
Name: Splunk Information Exposure (SP-CAAAP5E
Filename: splunk_information_exposure_660.nasl
Vulnerability Published: 2018-06-08
This Plugin Published: 2019-01-14
Last Modification Time: 2021-10-29
Plugin Version: 1.3
Plugin Type: remote
Plugin Family: CGI abuses
Dependencies: splunkd_detect.nasl, splunk_web_detect.nasl
Required KB Items [?]: installed_sw/Splunk

Vulnerability Information

Severity: Medium
Vulnerability Published: 2018-06-08
Patch Published: 2018-06-18
CVE [?]: CVE-2018-11409
CPE [?]: cpe:/a:splunk:splunk

Synopsis

An application running on the remote web server is affected by an information exposure vulnerability.

Description

According to its self-reported version number, the version of Splunk running on the remote web server is Splunk Enterprise 6.x prior to 6.6.0. Therefore it is affected by an information disclosure vulnerability at a Splunk REST endpoint. An unauthenticated, remote attacker can exploit this via the submission a specially crafted request, to disclose potentially sensitive information about the operating system, hardware and Splunk license.

Solution

Upgrade to Splunk Enterprise version 6.6.0 or later.

Public Exploits

Target Network Port(s): 8000, 8089
Target Asset(s): Services/www
Exploit Available: True (Exploit-DB, GitHub)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the Splunk Information Exposure (SP-CAAAP5E vulnerability:

  1. Exploit-DB: exploits/linux/webapps/44865.txt
    [EDB-44865: Splunk < 7.0.1 - Information Disclosure]
  2. GitHub: https://github.com/kofa2002/splunk
    [CVE-2018-11409]

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-2018-11409
CVSS V2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:OF/RC:C
CVSS Base Score:5.0 (Medium)
Impact Subscore:2.9
Exploitability Subscore:10.0
CVSS Temporal Score:3.9 (Low)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:3.9 (Low)
CVSS V3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C
CVSS Base Score:5.3 (Medium)
Impact Subscore:1.4
Exploitability Subscore:3.9
CVSS Temporal Score:4.8 (Medium)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:4.8 (Medium)
STIG Severity [?]: I
STIG Risk Rating: High

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Plugin Source

This is the splunk_information_exposure_660.nasl nessus plugin source code. This script is Copyright (C) 2019-2021 and is owned by Tenable, Inc. or an Affiliate thereof. 

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

include("compat.inc");

if (description)
{
  script_id(121163);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/10/29");

  script_cve_id("CVE-2018-11409");
  script_xref(name:"IAVA", value:"2021-A-0502");

  script_name(english:"Splunk Information Exposure (SP-CAAAP5E");
  script_summary(english:"Checks the version of Splunk.");

  script_set_attribute(attribute:"synopsis", value:
"An application running on the remote web server is affected by
an information exposure vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the version of Splunk
running on the remote web server is Splunk Enterprise 6.x prior to 
6.6.0. Therefore it is affected by an information disclosure
vulnerability at a Splunk REST endpoint. An unauthenticated, remote 
attacker can exploit this via the submission a specially crafted 
request, to disclose potentially sensitive information about the 
operating system, hardware and Splunk license.");

  script_set_attribute(attribute:"see_also", value:"https://www.splunk.com/view/SP-CAAAP5E");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Splunk Enterprise version 6.6.0 or later.");

  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  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:L/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-11409");
  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:"2018/06/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/06/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/14");

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

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

  script_copyright(english:"This script is Copyright (C) 2019-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_dependencies("splunkd_detect.nasl", "splunk_web_detect.nasl");
  script_require_ports("Services/www", 8089, 8000);
  script_require_keys("installed_sw/Splunk");

  exit(0);
}

include("vcf.inc");
include("http.inc");

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

app_info = vcf::get_app_info(app:app, port: port);
if (app_info['License'] == "Enterprise")
{
  constraints = [{ "min_version" : "6.2.0", "fixed_version" : "6.6.0" }];
}
else
  audit(AUDIT_LISTEN_NOT_VULN, 'Splunk', port);

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);

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

  • Linux / Unix:
    /opt/nessus/lib/nessus/plugins/splunk_information_exposure_660.nasl
  • Windows:
    C:\ProgramData\Tenable\Nessus\nessus\plugins\splunk_information_exposure_660.nasl
  • Mac OS X:
    /Library/Nessus/run/lib/nessus/plugins/splunk_information_exposure_660.nasl

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How to Run

Here is how to run the Splunk Information Exposure (SP-CAAAP5E as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

  1. Click to start a New Scan.
  2. Select Advanced Scan.
  3. Navigate to the Plugins tab.
  4. On the top right corner click to Disable All plugins.
  5. On the left side table select CGI abuses plugin family.
  6. On the right side table select Splunk Information Exposure (SP-CAAAP5E plugin ID 121163.
  7. Specify the target on the Settings tab and click to Save the scan.
  8. 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_information_exposure_660.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a splunk_information_exposure_660.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - splunk_information_exposure_660.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_information_exposure_660.nasl -t <IP/HOST>

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References

IAVA | Information Assurance Vulnerability Alert:
  • 2021-A-0502
See also: Similar and related Nessus plugins:
  • 121164 - Splunk Information Disclosure Vulnerability (SP-CAAAP5E)
  • 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
  • 94932 - 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
  • 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
  • 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_information_exposure_660.nasl version 1.3. For more plugins, visit the Nessus Plugin Library.

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