Date: Tue, 21 Apr 2009 10:25:03 +0200 From: Marcus Meissner <meissner@...e.de> To: Eugene Teo <eugene@...hat.com> Cc: oss-security@...ts.openwall.com, security@...nel.org, sfrench@...ibm.com Subject: Re: CVE request? buffer overflow in CIFS in 2.6.* On Tue, Apr 21, 2009 at 10:59:25AM +0800, Eugene Teo wrote: > Marcus Meissner wrote: > > On Tue, Apr 07, 2009 at 01:41:44PM +0800, Eugene Teo wrote: > >> 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. > > > > tracked in the public bugzilla entry: > > https://bugzilla.novell.com/show_bug.cgi?id=492282 > > > > and: > > http://lists.samba.org/archive/linux-cifs-client/2009-April/004322.html ff. > > for the cifs discussion. > > Here's an update: > http://lkml.org/lkml/2009/4/20/21 Our maintainer also referenced: http://lists.samba.org/archive/linux-cifs-client/2009-April/004450.html http://lists.samba.org/archive/linux-cifs-client/2009-April/004452.html They are already in the CIFS git tree: http://git.kernel.org/?p=linux/kernel/git/sfrench/cifs-2.6.git;a=summary http://git.kernel.org/?p=linux/kernel/git/sfrench/cifs-2.6.git;a=commit;h=7b0c8fcff47a885743125dd843db64af41af5a61 http://git.kernel.org/?p=linux/kernel/git/sfrench/cifs-2.6.git;a=commit;h=968460ebd8006d55661dec0fb86712b40d71c413 Ciao, Marcus
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