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Date: Tue, 16 Mar 2010 14:41:52 +0100
From: Peter Sylvester <>
Cc: Brian Stafford <>,,,
	Pawel Salek <>,
Subject: Re: CVE Request: libesmtp does not check NULL bytes
 in commonName

> Doesn't that lack a null byte check for subjAltNames?

The patch seems broken to me:
X509_NAME_get_text_by_NID gets the "highest" one, not the leaf value.
In case of two common names, this is wrong.

So instead of
int l = X509_NAME_get_text_by_NID (X509_get_subject_name (cert),
                             NID_commonName, buf, sizeof buf);

one needs something like:

    X509_NAME *name = X509_get_subject_name(cert) ;

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