D-Link Captcha Partially Broken and DNS Pinning

| No Comments | No TrackBacks


The recent distribution of the D-Link Firmware to thwart malicious attacks has additional issues . Read more at:

ZDNet May12th Report on D-Link add CAPTCHA to home routers and

Hack-A-Day D-Link-adds-Captcha-to-Routers

According to SourceSec Security Research , the attack works like this:

1. Malware loads the router's index page and glean the salt generated by the router.
2. The malware uses the salt to generate a login hash for the D-Link User account (blank password by default).
3. The malware sends the hash to the post_login.xml page.
4. The malware sends a request to the wifisc_add_sta.xml page, activating WPS.
5. The attacker uses WPSpy to detect when the victim's router is looking for WPS clients, and connects to the WiFi network using a WPS-capable network card.

Additionally, this vulnerability could be triggered by a simple JavaScript snippet using anti-DNS pinning, which removes the requirement for the attacker to have installed malware onto a machine inside the target network; the victim could be exploited by simply browsing to an infected Web page.

See these additional articles:

How DNS Pinning Works and why my router was not effective

DNS Pinning Death by 1000 Cutts

07 BlackHat Presentation on DNS Pinning

No TrackBacks

TrackBack URL: http://www.netforensics.com/mt/mt-tb.cgi/67

Leave a comment

Subscribe

Enter your email address:



Syndicate




© 2010 netForensics, Inc Privacy Policy | Site Map