Re: Cisco 6509 switch telnet vulnerability

[Bob Niederman <btrq@bob-n.com>]

While this is clearly a bug, the example given does not show that it's
serious.  The example (and the statement "...as long as they are followed
by a space and a ?") shows that you have gotten the syntax for the next
parameter of the command, not that you have executed it.


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On 3 Oct 2003, Chris Norton wrote:

> 
> 
> A vulnerability has been found on Cisco 6509 switches. The
> vulnerability was found to work on 2 different Cisco 6509 switches
> running CATOS 5.4(2) and 5.5(2). The vulnerability can lead to
> information and commands being exectued on the remote switch from the
> login prompt. Commands can be exectued at the Enter password: prompt
> as long as they are followed by a space and a ? Proof of concept
> below: Cisco Systems Console
> 
> Enter password:
> <data_size>                Size of the packet (0..1420)
> <cr>                       
> Enter password: traceroute 127.0.0.1
> 
> This vulnerability has yet to be confirmed by Cisco but they have been 
> alerted about it.
>