Tickets :: Comment on [#12265] IMAP package throws errors

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Comment	>> Would be useful to actually explain the problem so it might get fixed >> also for the IMAP servers affected. > > I have. Many times in the past. We've uncovered literally dozens of > IMAP server bugs the last few years. You can search the list > archives and/or the source code commits for further details on these > various bugs. > > For the record, this bug can only be triggered if: > > 1) The PHP server loses network connection to the IMAP server. This > could be either a network issue or a crash on the IMAP server side, > which happens often - especially with certain older versions of > Courier - that are triggered by a specific IMAP command. > > 2) The IMAP server responds to a command with a unsolicited BYE. > Again, this should NEVER happen during a normal conversation > (although this is something that is allowed, or at least > contemplated, by the RFC) > > Unfortunately, in moving things around to fix an error that I COULD > reliably reproduce locally, these two cases were ignored. And both > cases are extremely difficult to write test cases for (I would > essentially need to build a "dummy" PHP server for the test unit, > which I don't have the time or funding for right now). > >> The fact that different versions >> of Dovecot and also Courier are affected point to a not obvious but >> common problem, no? > > No, that doesn't mean anything. Can't help but notice that nobody > running Dovecot 2.1 or 2.2 are seeing anything, for example. > > And FWIW, the other day I found a bug in Dovecot 2.2.2 (the latest > version) that is not yet fixed. Although granted, that issue would > not trigger this bug - it's a problem with parsing CATENATE > parameters with literal8 data.
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