Tetsuo Handa writes:
Sam Varshavchik wrote: > Tetsuo Handa writes: >> > Then, I think that my case ( /usr/lib/courier-imap/bin/imapd process crashes> > by> > memory corruption; valgrind reports off-by-a-few-bytes ) should be considered > > as a bug of courier-imap when a bogus 0xe3 is located at the tail of a mail> > address (e.g. <someb...@example.com\\xe3> ) within the header lines. > > > > I\'ll try to develop an example reproducer for bug reporting. > > You should try to capture the exact IMAP commands too. I cannot reproduce > your crash, at least with the current version of Courier-IMAP, with FETCH > (ENVELOPE), which would be the likely culprit.I can reproduce the crash (both courier-imap-4.9.3 and courier-imap-4.12.0) on CentOS 6.3 with below steps.
This turns out to be a tiny bug in the GNU libidn library causing all sorts of crap happen in Courier-IMAP. I'm not a happy camper today. I need to figure out how to work around this bug…
In the mean time, you can build Courier and Courier-IMAP with an additional --without-libidn parameter passed to the configure script. This will turn off some IDN support bits.
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