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Date: Wed, 29 Jun 2011 21:35:19 +0400
From: Vasiliy Kulikov <>
To: Linus Torvalds <>
Cc: Andrew Morton <>,,
Subject: Re: [Security] CVE request: kernel: taskstats/procfs io infoleak
 (was: taskstats authorized_keys presence infoleak PoC)

On Wed, Jun 29, 2011 at 10:32 -0700, Linus Torvalds wrote:
> On Wed, Jun 29, 2011 at 10:21 AM, Vasiliy Kulikov <> wrote:
> >
> > So, with rounded read_characters value it's possible to learn privkey
> > length.
> Umm. You can trivially figure that out from the public key lenth
> already, can't you?

No, the attacker here have no information about the key at all.  It
tries to authorize with a random key and a random password.

Vasiliy Kulikov - bringing security into open computing environments

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