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 - Nessus

High   Plugin ID: 97100

This page contains detailed information about the 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 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: 97100
Name: 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
Filename: splunk_652.nasl
Vulnerability Published: 2016-05-17
This Plugin Published: 2017-02-10
Last Modification Time: 2019-11-13
Plugin Version: 1.12
Plugin Type: remote
Plugin Family: CGI abuses
Dependencies: splunkd_detect.nasl, splunk_web_detect.nasl
Required KB Items [?]: installed_sw/Splunk

Vulnerability Information

Severity: High
Vulnerability Published: 2016-05-17
Patch Published: 2017-01-25
CVE [?]: CVE-2016-5418, CVE-2016-8688, CVE-2017-5607, CVE-2017-5880
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 6.2.13, 6.3.x prior to 6.3.9, 6.4.x prior to 6.4.5, or 6.5.x prior to 6.5.2; or else it is Splunk Light prior to 6.5.2. It is, therefore, affected by multiple vulnerabilities :

- A security bypass vulnerability exists in the libarchive component due to a failure to properly check hardlinks that contain payload data. An unauthenticated, remote attacker can exploit this to bypass sandbox restrictions. (CVE-2016-5418)

- An out-of-bounds write error exists in the libarchive component in the get_line_size() function in archive_read_support_format_mtree.c that is triggered when parsing lines. An unauthenticated, remote attacker can exploit this to crash the library or disclose memory contents. (CVE-2016-8688)

- An information disclosure vulnerability exists in Splunk Light due to various system information being assigned to the global window property '$C' when a request is made to '/en-US/config?autoload=1'. An unauthenticated, remote attacker attacker can exploit this, via a specially crafted web page, to disclose sensitive information. (CVE-2017-5607)

- A denial of service vulnerability exists in the Splunk Web component due to improper validation of user-supplied input. An authenticated, remote attacker can exploit this, via a specially crafted GET request, to crash the daemon. (CVE-2017-5880)

- A flaw exists in the libarchive component in the check_symlinks() function in archive_write_disk_posix.c that is triggered during the handling of subdirectories. An unauthenticated, remote attacker can exploit this to overwrite arbitrary files.

- A flaw exists in the libarchive component in the edit_deep_directories() function due to symlink checks and deep-directory support failing to properly handle overly long pathnames. An unauthenticated, remote attacker can exploit this to overwrite arbitrary files.

- A flaw exists in the libarchive component in the check_symlinks() function that is due to an overly aggressive cached path handling mechanism. An unauthenticated, remote attacker can exploit this to make changes to the permissions of arbitrary directories.

- An out-of-bounds write error exists in the libarchive component in the bsdtar_expand_char() function in util.c due to improper handling of crafted archives. An unauthenticated, remote attacker can exploit this, by convincing a user to open or load a specially crafted archive, to execute arbitrary code.

- A stored cross-site scripting (XSS) vulnerability exists due to improper validation of input before returning it to users. An authenticated, remote attacker who has administrative access can exploit this, via a specially crafted request, to execute arbitrary script code in a user's browser session.

- A stored cross-site scripting (XSS) vulnerability exists in Splunk Light within the web interface due to improper validation of unspecified input before returning to users. An authenticated, remote attacker can exploit this, via a specially crafted request, to execute arbitrary script code in a user's browser session.

Note that the vulnerabilities in the libarchive component do not affect Splunk Enterprise 6.5.1 or Splunk Light 6.5.1.

Solution

Upgrade to Splunk Enterprise version 5.0.17 / 6.0.13 / 6.1.12 / 6.2.13 / 6.3.9 / 6.4.5 / 6.5.2 or later. Upgrade Splunk Light to version 6.5.2 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 / 6.2.13 / 6.3.9 / 6.4.5 / 6.5.2 or Splunk Light < 6.5.2 Multiple Vulnerabilities vulnerability:

  1. Exploit-DB: exploits/multiple/webapps/41779.txt
    [EDB-41779: Splunk Enterprise - Information Disclosure]
  2. GitHub: https://github.com/tsumarios/Splunk-Defensive-Analysis
    [CVE-2017-5607]

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-2016-5418
CVSS V2 Vector: AV:N/AC:L/Au:N/C:N/I:P/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:N/I:H/A:N/E:P/RL:O/RC:C
CVSS Base Score:7.5 (High)
Impact Subscore:3.6
Exploitability Subscore:3.9
CVSS Temporal Score:6.7 (Medium)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:6.7 (Medium)

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Plugin Source

This is the splunk_652.nasl nessus plugin source code. This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. 

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

include("compat.inc");

if (description)
{
  script_id(97100);
  script_version("1.12");
  script_cvs_date("Date: 2019/11/13");

  script_cve_id(
    "CVE-2016-5418",
    "CVE-2016-8688",
    "CVE-2017-5607",
    "CVE-2017-5880"
  );
  script_bugtraq_id(
    93165,
    93781,
    95804,
    97265,
    97286
  );

  script_name(english:"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");
  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 6.2.13,
6.3.x prior to 6.3.9, 6.4.x prior to 6.4.5, or 6.5.x prior to 6.5.2;
or else it is Splunk Light prior to 6.5.2. It is, therefore, affected
by multiple vulnerabilities :

  - A security bypass vulnerability exists in the libarchive
    component due to a failure to properly check hardlinks
    that contain payload data. An unauthenticated, remote
    attacker can exploit this to bypass sandbox
    restrictions. (CVE-2016-5418)

  - An out-of-bounds write error exists in the libarchive
    component in the get_line_size() function in
    archive_read_support_format_mtree.c that is triggered
    when parsing lines. An unauthenticated, remote attacker
    can exploit this to crash the library or disclose
    memory contents. (CVE-2016-8688)

 -  An information disclosure vulnerability exists in Splunk
    Light due to various system information being assigned
    to the global window property '$C' when a request is
    made to '/en-US/config?autoload=1'. An unauthenticated,
    remote attacker attacker can exploit this, via a
    specially crafted web page, to disclose sensitive
    information. (CVE-2017-5607)

  - A denial of service vulnerability exists in the Splunk
    Web component due to improper validation of
    user-supplied input. An authenticated, remote attacker
    can exploit this, via a specially crafted GET request,
    to crash the daemon. (CVE-2017-5880)

  - A flaw exists in the libarchive component in the
    check_symlinks() function in archive_write_disk_posix.c
    that is triggered during the handling of subdirectories.
    An unauthenticated, remote attacker can exploit this to
    overwrite arbitrary files.

  - A flaw exists in the libarchive component in the
    edit_deep_directories() function due to symlink checks
    and deep-directory support failing to properly handle
    overly long pathnames. An unauthenticated, remote
    attacker can exploit this to overwrite arbitrary files.

  - A flaw exists in the libarchive component in the
    check_symlinks() function that is due to an overly
    aggressive cached path handling mechanism. An
    unauthenticated, remote attacker can exploit this to
    make changes to the permissions of arbitrary
    directories.

  - An out-of-bounds write error exists in the libarchive
    component in the bsdtar_expand_char() function in util.c
    due to improper handling of crafted archives. An
    unauthenticated, remote attacker can exploit this, by
    convincing a user to open or load a specially crafted
    archive, to execute arbitrary code.

  - A stored cross-site scripting (XSS) vulnerability exists
    due to improper validation of input before returning it
    to users. An authenticated, remote attacker who has
    administrative access can exploit this, via a specially
    crafted request, to execute arbitrary script code in a
    user's browser session.

  - A stored cross-site scripting (XSS) vulnerability exists
    in Splunk Light within the web interface due to improper
    validation of unspecified input before returning to
    users. An authenticated, remote attacker can exploit
    this, via a specially crafted request, to execute
    arbitrary script code in a user's browser session.

Note that the vulnerabilities in the libarchive component do not
affect Splunk Enterprise 6.5.1 or Splunk Light 6.5.1.");
  script_set_attribute(attribute:"see_also", value:"https://www.splunk.com/view/SP-CAAAPW8");
  script_set_attribute(attribute:"see_also", value:"https://www.splunk.com/view/SP-CAAAPYC");
  script_set_attribute(attribute:"see_also", value:"https://www.splunk.com/view/SP-CAAAPZ3");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Splunk Enterprise version 5.0.17 / 6.0.13 / 6.1.12 /
6.2.13 / 6.3.9 / 6.4.5 / 6.5.2 or later. Upgrade Splunk Light to
version 6.5.2 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/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:N/I:H/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-2016-5418");

  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:"2016/05/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/01/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/02/10");

  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) 2017-2019 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'];
if (isnull(license)) exit(1, "Unable to retrieve the Splunk license type.");

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 < 6.2.13
  else if (ver =~ "^6\.2($|[^0-9])")
    fix = '6.2.13';

  # 6.3.x < 6.3.9
  else if (ver =~ "^6\.3($|[^0-9])")
    fix = '6.3.9';

  # 6.4.x < 6.4.5
  else if (ver =~ "^6\.4($|[^0-9])")
    fix = '6.4.5';

  # 6.5.x < 6.5.2
  else if (ver =~ "^6\.5($|[^0-9])")
    fix = '6.5.2';
}
else if (license == "Light")
{
  # any < 6.5.2
  fix = '6.5.2';
}

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_WARNING, xss:TRUE);
  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_652.nasl
  • Windows:
    C:\ProgramData\Tenable\Nessus\nessus\plugins\splunk_652.nasl
  • Mac OS X:
    /Library/Nessus/run/lib/nessus/plugins/splunk_652.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 / 6.2.13 / 6.3.9 / 6.4.5 / 6.5.2 or Splunk Light < 6.5.2 Multiple Vulnerabilities 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 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 plugin ID 97100.
  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_652.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a splunk_652.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - splunk_652.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_652.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID: See also: Similar and related Nessus plugins:
  • 111859 - Photon OS 1.0: Binutils / Libarchive / Ntp PHSA-2017-0010 (deprecated)
  • 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
  • 96730 - Apple iOS < 10.2.1 Multiple Vulnerabilities
  • 96877 - Apple TV < 10.1.1 Multiple Vulnerabilities
  • 96731 - macOS 10.12.x < 10.12.3 Multiple Vulnerabilities
  • 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
  • 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_652.nasl version 1.12. For more plugins, visit the Nessus Plugin Library.

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