dovecot - Jan 2013 - Folder names

Running a pretty basic setup of imap +pop3 on version 2.1.10

 

Users are able to create folders in imap that contain "&" the
folder on the
backend reflects "&-" as it should, you can list folder, but then
when you
relog into imap then decides it can no longer subscribe to this folder due
to invalid UTF characters. Essentially allowing users to lock themselves out
by using a very common character in a folder name.

 

Might one of the imap client compatibility plugins in imapd  cause this
quirkiness ?

 

Should I be coming at this from another direction?

 

Is this a bug?

On 2.1.2013, at 1.17, James Starowitz <starsoft at starnova.net> wrote:
> Running a pretty basic setup of imap +pop3 on version 2.1.10
> 
> Users are able to create folders in imap that contain "&" the
folder on the
> backend reflects "&-" as it should, you can list folder, but
then when you
> relog into imap then decides it can no longer subscribe to this folder due
> to invalid UTF characters. Essentially allowing users to lock themselves
out
> by using a very common character in a folder name.
> 
> Might one of the imap client compatibility plugins in imapd  cause this
> quirkiness ?
Maybe it's a client bug? You didn't say which client you're using.
Anyway, I'm not aware of any bugs related to this. Show what commands the
client sends with e.g. rawlog: http://wiki2.dovecot.org/Debugging/Rawlog

A quick test shows that it works with me:

x create foo&-bar
x OK Create completed.
x subscribe foo&-bar
x OK Subscribe completed.
x unsubscribe foo&-bar
x OK Unsubscribe completed.
x delete foo&-bar
x OK Delete completed.

Note that the client must send it as &- because that's how mUTF-7
character set works with IMAP.