qwik-smtpd format string

Advisory : H0tTurk-
Product : qwik-smtpd (latest version).
Vendor : http://qwikmail.sourceforge.net/
Bug : format string vulnerability
Vendor Status : Released Patch. http://qwikmail.sourceforge.net/smtpd/qwik-smtpd-0.3.patch

It is an SMTP (mail) server that supports SMTP and ESMTP. Once finished,
it will be very secure, hopefully with the same reputation as qmail.

I found format string bug in Qwik-SMTP daemon.
See this:

File: qwik-smtpd.c

sprintf(Received,"Received: from %s (TURK %s) (%s) by %s with SMTP; %s\n", clientHost,
clientHelo, clientIP, localHost, timebuf);
…
else
{
fprintf(fpout,Received);
…

As you can see, bug found in main() function. This type is REMOTE.
We don't want to release an exploit to avoid kids usage.

Spc Thx:
Drmaxvirus,Gencturk,İlkerkandemir,TiT,LuciferCihan,madconfig,tr-zindan,Theghost,SAWTURK,Ambassador,RidvanCihan,Crackers_Child,Kurtefendy,And Ayyildiz Vip TiM User,Soldiers