Date: Tue, 16 Mar 2010 11:46:11 +0000 From: Brian Stafford <brian@...fford.uklinux.net> To: oss-security@...ts.openwall.com Cc: libesmtp@...fford.uklinux.net, security@...ntu.com, Pawel Salek <pawsa@...ochem.kth.se>, jskarvad@...hat.com Subject: Re: CVE Request: libesmtp does not check NULL bytes in commonName Ludwig Nussel wrote: > Brian Stafford wrote: > >> I think the best approach is to apply Pawel's patch as this is the >> > > I must have missed that patch. Could you re-post it? > It's available at https://bugzilla.redhat.com/attachment.cgi?id=399131 > >> simplest in terms of changes to the existing code base, and perhaps move >> to Ludwig's for a later release of libESMTP. In the slightly longer >> term, I think the internet draft at >> http://tools.ietf.org/html/draft-saintandre-tls-server-id-check is the >> one to follow but this might change substantially or even fall of the >> rails entirely. >> >> [...] The I-D says only the leftmost >> component may contain a wildcard but this would rule out *.*.google.com >> The algorithm I've outlined is really a halfway house between RFC2818, >> which I think is too flexible, and the I-D; limit the positions of >> wildcards in the hostname and dont allow elaborate matches within a >> hostname component. Any ideas or opinions on this would be useful. >> > > Is there a way to comment on the draft? Maybe the author of the > draft didn't think about the cases you'd like to handle. > Normally IETF working groups create a mailing list for discussion of drafts when chartered and any interested party may subscribe. However, as far as I can tell, this I-D is an individual submission; I can't find a mailing list address so probably best to mail the authors directly. > cu > Ludwig > > Regards Brian
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