From: "Brett Frankenberger" <rbf@rbfnet.com>
To: vlebedev@aplio.fr (Vadim Lebedev)
Cc: linux-kernel@vger.kernel.org
Subject: Re: Potenitial security hole in the kernel
Date: Mon, 28 May 2001 17:44:08 -0500 (CDT) [thread overview]
Message-ID: <200105282244.RAA19619@rbfux.rbfnet.com> (raw)
In-Reply-To: <003601c0e7bf$41953080$0101a8c0@LAP> from "Vadim Lebedev" at May 28, 2001 11:43:38 PM
>
> Hi folks,
>
> Please correct me if i'm wrong but it seems to me that i've stumbled on
> really BIG security hole in the signal handling code.
> The problem IMO is that the signal handling code stores a processor context
> on the user-mode stack frame which is active while
> the signal handler is running. Then sys_sigreturn restores back the context
> from user mode stack...
> Suppose the signal handler modifies this context frame for example by
> storing into the PC slot address of the panic routine
> then when handler will exit panic will be called with obvious results.
>
>
> Please CC your comments to me directly as i'm not subscibed to this list
>
> Vadim Lebedev
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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> Please read the FAQ at http://www.tux.org/lkml/
>
next prev parent reply other threads:[~2001-05-28 22:44 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-28 21:43 Potenitial security hole in the kernel Vadim Lebedev
2001-05-28 22:21 ` Philip Blundell
2001-05-28 22:26 ` Vadim Lebedev
2001-05-28 22:29 ` Kurt Roeckx
2001-05-28 22:30 ` Vadim Lebedev
2001-05-28 23:15 ` Kurt Roeckx
2001-05-28 22:44 ` Brett Frankenberger [this message]
2001-05-28 23:12 ` Russell King
2001-05-28 23:30 ` Kurt Roeckx
2001-05-28 23:46 ` Kurt Roeckx
2001-05-29 0:32 ` Jamie Lokier
2001-05-29 7:35 ` Chris Wedgwood
2001-05-29 10:14 ` Jamie Lokier
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