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vendor:
Routers
by:
milw0rm.com
7,5
CVSS
HIGH
Denial of Service (DoS)
N/A
CWE
Product Name: Routers
Affected Version From: N/A
Affected Version To: N/A
Patch Exists: Yes
Related CWE: N/A
CPE: N/A
Metasploit: N/A
Other Scripts: N/A
Tags: N/A
CVSS Metrics: N/A
Nuclei References: N/A
Nuclei Metadata: N/A
Platforms Tested: vxworks
2006

IRC-only DoS attack on routers

Various routers, particularly Netgear and Linksys routers, are vulnerable to an IRC-only DoS attack. If a client behind one of the vulnerable routers connects to an IRC server on port 6667 (and only 6667, does not DoS with other ports) and a user posts the string 'DCC SEND anylongrandomstringhere' in either a channel, private message, ctcp, notice, etc., the router will drop the connection. The routers that are vulnerable to this are running vxworks as their embedded OS. Older linux Linksys routers appear to be immune.

Mitigation:

Upgrade to the latest version of the router's firmware.
Source

Exploit-DB raw data:

It appears that various routers are prone to an IRC-only DoS attack. 
Particularly Netgear and Linksys routers have been shown vulnerable.

If a client behind one of the vulnerable routers connects to an IRC server on port 6667 
(and only 6667, does not DoS with other ports) and a user posts the following string 
in either a channel, private message, ctcp, notice, etc.. the router will drop the connection. 
The string is as follows:

DCC SEND anylongrandomstringhere

Further, it appears the routers that are vulnerable to this are running vxworks as their 
embedded OS. Older linux Linksys routers appear to be immune.

# milw0rm.com [2006-03-04]

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