[OpenAFS] Re: [OpenAFS-announce] OpenAFS Security Advisory 2007-001: privilege escalation in Unix-based clients

Jeffrey Altman jaltman@secure-endpoints.com
Fri, 23 Mar 2007 10:04:28 -0400


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Kim Kimball wrote:
> I'm still wondering if
> 
> a.  Removing system:anyuser from ACLs will prevent this privilege
> escalation
> b.  Removing system:anyuser from ACLs except "system:anyuser l" will
> prevent the privilege escalation (i.e. the only occurrence of
> system:anyuser is with l permission)
> 
> Any definitive conclusions?
> 
> Thanks!
> 
> Kim

As has been discussed on this list over the last few days, modifying the
contents of unprotected data retrieved via anonymous connections is just
one form of attack that can be executed.

Your proposal will make attacks harder, it will not prevent them.

Jeffrey Altman



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