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Message-ID: <49DAE798.8020008@redhat.com>
Date: Tue, 07 Apr 2009 13:41:44 +0800
From: Eugene Teo <eugene@...hat.com>
To: Marcus Meissner <meissner@...e.de>
CC: oss-security@...ts.openwall.com, security@...nel.org, sfrench@...ibm.com
Subject: Re: CVE request? buffer overflow in CIFS in 2.6.*
Hi Marcus,
Marcus Meissner wrote:
> Fixes a kmalloc area overflow in CIFS, number of overwritten bytes
> is depending on the codepage converted to.
>
> The data seems to come from a remote generated reply blob even, correct
> me if I am wrong. :/
Looks like it's part of the session setup. The NativeFileSystem field is
part of the Tree Connect response (TCon for short).
> And I wonder if "len*2" is sufficient, can't a UCS -> UTF8 conversion
> generate more than 2 byte utf-8 characters for 1 ucs character?
I understand that someone from your side is working on a better patch
for this. Do keep us updated when it goes upstream.
Thanks, Eugene
--
Eugene Teo / Red Hat Security Response Team
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