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Date: Mon, 12 Mar 2012 18:39:26 +0100
From: Tomas Hoger <thoger@...hat.com>
To: oss-security@...ts.openwall.com
Subject: Re: CVE request: openssl: null pointer dereference
issue
On Mon, 27 Feb 2012 15:42:44 +0100 Matthias Weckbecker wrote:
> bad S/MIME messages with crafted MIME headers can result in a NULL
> pointer dereference in openssl's ans1 parser,
>
> https://bugzilla.novell.com/show_bug.cgi?id=748738
> http://www.mail-archive.com/openssl-dev@openssl.org/msg30305.html
> http://cvs.openssl.org/chngview?cn=22144
Note that additional similar issue in mime_param_cmp was fixed in
0.9.8u and 1.0.0h as:
http://cvs.openssl.org/chngview?cn=22252
This can also be triggered by malformed S/MIME message.
The above commit also corrects an issue with the previous mime_hdr_cmp
fix that could cause the function to return either "less than" or
"greater than" when comparing NULL to non-NULL. There's no known
security impact of this change, it seems it could cause verification /
decryption to fail when it can succeed. Reported by "bla".
--
Tomas Hoger / Red Hat Security Response Team
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