Kerberos vulnerability

Julian Assange proff at
Wed Feb 21 22:07:59 PST 1996

> A Kerberos V4 session key is chosen by calling random() repeatedly.
> THe PRNG is seeded with srandom(time.tv_usec ^ time.tv_sec ^ p ^ n++),
> where p is a static integer set to getpid() ^ gethostid() on the first
> call and n is a static counter.
> Is there any entropy here???  Most, if not all, Kerberos servers run one
> time synchronization protocol or another, which reduces the entropy to a
> few bits at most.
> DEADBEAT <na5877 at>

usec grainlessness typically doesn't approach anything like a usec on most
OS implimentations either.

|Julian Assange                    | "if you think the United  States has    |
|FAX: +61-3-9819-9066              |  stood still, who built the largest     |
|EMAIL: proff at         |  shopping centre in the world?" - Nixon |

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