[Full-disclosure] Kmail <= 1.9.1 (latest) DOS

Found this while fuzzing for a different type of vuln. For the life of
me I cant do anything useful with this bug so here it is. I dont have
the time to narrow down what causes the crash, if anyone manages to
get code execution from it, be a dear and let me know ;)

I am using KDE 3.5.2 and kmail 1.9.1.

This bug requires HTML to be enabled (Settings -> Configure Kmail ->
Security -> and tick Prefer HTML to Plain Text.).

(email that causes crash) http://silenthack.co.uk/nnp/exploits/kmail/crashMail

When the mail is viewed it should crash immediately and give you a
stack trace similar to

(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
[KCrash handler]
#6 0xffffe410 in __kernel_vsyscall ()
#7 0xb787b9a1 in raise () from /lib/tls/i686/cmov/libc.so.6
#8 0xb787d2b9 in abort () from /lib/tls/i686/cmov/libc.so.6
#9 0xb7757cf9 in kdbgstream::flush () from /usr/lib/libkdecore.so.4
#10 0xb7bf7cda in endl () from /usr/lib/libkmailprivate.so
#11 0xb5be724e in KIO::Scheduler::_scheduleJob () from /usr/lib/libkio.so.4
#12 0xb6cdaa17 in khtml_jpeg_source_mgr::khtml_jpeg_source_mgr ()
from /usr/lib/libkhtml.so.4
#13 0xb6cdad1a in khtml_jpeg_source_mgr::khtml_jpeg_source_mgr ()
from /usr/lib/libkhtml.so.4
#14 0xb7117eb9 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#15 0xb7118954 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#16 0xb74ad39e in QTimer::timeout () from /usr/lib/libqt-mt.so.3
#17 0xb713ceb1 in QTimer::event () from /usr/lib/libqt-mt.so.3
#18 0xb70ade56 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#19 0xb70ae052 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#20 0xb77abd7d in KApplication::notify () from /usr/lib/libkdecore.so.4
#21 0xb703f157 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#22 0xb709f843 in QEventLoop::activateTimers () from /usr/lib/libqt-mt.so.3
#23 0xb7052f67 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#24 0xb70c6947 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#25 0xb70c686a in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#26 0xb70ac965 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#27 0x0804a04b in ?? ()
#28 0xbfe80938 in ?? ()
#29 0xbfe80b24 in ?? ()
#30 0x00000000 in ?? ()

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http://silenthack.co.uk
http://smashthestack.org

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