oss-security - Mutt 1.5.19 SSL chain verification flaw

Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers

[<prev] [next>] [day] [month] [year] [list]

Date: Wed, 10 Jun 2009 11:50:38 +0200
From: Tomas Hoger <thoger@...hat.com>
To: OSS Security <oss-security@...ts.openwall.com>
Subject: Mutt 1.5.19 SSL chain verification flaw

Hi!

Mutt version 1.5.19 introduced a support for intermediate CA certs,
available when mutt is linked against both OpenSSL and GnuTLS, added
via upstream commits:

http://dev.mutt.org/trac/changeset/5621:5db868a874b6/mutt_ssl.c
http://dev.mutt.org/trac/changeset/5623:7d0583e0315d/mutt_ssl_gnutls.c

Miroslav Lichvar noticed that a certificate chain validation was not
implemented properly.  Individual certificates in the chain where
checked and accepted, but the chain as a whole as not validated
properly.

Issue was addressed via following upstream patches:

http://dev.mutt.org/trac/changeset?new=5870:dc9ec900c657@...t_ssl.c&old=5699:1238dff54a15@...t_ssl.c
http://dev.mutt.org/trac/changeset?new=5853:0b13183e40e0@...t_ssl_gnutls.c&old=5699:1238dff54a15@...t_ssl_gnutls.c

CVE-2009-1390 was assigned to this issue.

-- 
Tomas Hoger / Red Hat Security Response Team

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.