oss-security - Fix for CVE-2010-4524 and CVE-2010-1677 ready for verfication

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Message-ID: <4d1cf59f.26092a0a.1c22.ffff9576@mx.google.com>
Date: Thu, 30 Dec 2010 15:12:04 -0600
From: Earl Hood <earl@...lhood.com>
To: oss-security <oss-security@...ts.openwall.com>
cc: "Steven M. Christey" <coley@...us.mitre.org>,
    "non customers" <non-customers@...ramail.com>, jeff@....org,
    geissert@...ian.org, vendor-sec@....de, mhonarc-dev@...narc.org
Subject: Fix for CVE-2010-4524 and CVE-2010-1677 ready for verfication

I've committed in a potential fix, and made a
snapshot build that should address the following
recent security issues:

  CVE-2010-4524
  CVE-2010-1677

Snapshot release is available at the following location:

  http://www.mhonarc.org/release/MHonArc/dist/

Any build dated 2010-12-30, or later, will contain the
fix.

I ask the interested parties verify that the fix addresses
concerns raised as I would like to make a formal release
as soon as possible.

Summary of fix:

  mhtxthtml.pl filter modified to reject any message with
  nested tags. This is invalid HTML, so any message
  that contains it would likely indicate a possible attack.

Whenever a formal, public, announcement of these vulnerabilities
are raise, please include link to the MHonArc FAQ that discusses
the security risks of HTML mail and how to disable HTML mail
in mhonarc archives:

  http://www.mhonarc.org/MHonArc/doc/faq/security.html#htmldata
  http://www.mhonarc.org/MHonArc/doc/faq/security.html#htmlexchow

This may be useful for users who may not be able to upgrade
to the latest release, but need a work-around solution to secure
their sites.

Thanks,

--ewh
-- 
Earl Hood, <earl@...lhood.com>
Web: <http://www.earlhood.com/>
PGP Public Key: <http://www.earlhood.com/gpgpubkey.txt>

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