Re: Cisco Security Advisory: IOS HTTP authorization vulnerability

[Carson Gaspar <carson () taltos org>]

--On Friday, June 29, 2001 10:00 AM +0200 Eric Vyncke <evyncke () cisco com> 
wrote:

> As you probably know, for some password (used notably for SNMP, CHAP,
> PAP,  IKE, ...) there is a protocol need to get those passwords in the
> clear.  Hence, the obfuscation mechanism will always be reversible. Even
> using 3DES  will require a hard coded key hidden somewhere in the IOS
> code (and a  'simple' reverse engineering will expose this key).
>
> Of course, suggestions are welcome

For CHAP, do you actually need the password in the clear, or do you need 
the password+realm hash? The latter is far less dangerous.

--
Carson