Date: Tue, 7 Apr 2009 10:52:15 +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 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. Ciao, Marcus
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