Mail with unencoded charter in Subject: causes Squirrelmail to hang

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I'm using 1.4.20, and I found a mail which contains an unencoded
character in the Subject: header line.

When I'm trying to get a folder listing of a folder containing just
this one (broken) mail, squirrelmail will loop infinitely, the
associated php5-cgi process will hog the CPU:

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
12402 www-data  20   0 69144  28m  18m R  100  0.5   1:45.49 /usr/bin/php5-cgi

stracing the process yields no result:

webmail:~# strace -p 12402
Process 12402 attached - interrupt to quit

I have to kill -9 the process to get rid of it.

I could send the problematic mail here...

-- 
Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebrandt@xxxxxxxxxx | http://www.charite.de
	    

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