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(_at_)earlhood(_dot_)com>
Web: <http://www.earlhood.com/>
PGP Public Key: <http://www.earlhood.com/gpgpubkey.txt>
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