> Lastfriday something very strange happened. A 2 GB mbx-file > "JunkE-mail.mbx " appeared in one of the users' folders on the
> Anyoneany thoughts? > Ihave the spool folder, tmp-file and mbx-file available in very > small zips(somehow they compress very well! The 2 GB file compresses > to 947 KB and the 80MB file compresses to 211 KB). Maybe it's a compression Bomb, sorted out by a junkmail filter You can create very small zip-files which will deflate to very very huge files. If you use a Virus scanner, which is checking ZIP attachemnts it can run out of memeory or fill your disk with a temp file. Some information about these bombs: http://www.aerasec.de/security/advisories/decompression-bomb-vulnerability.html ATTENTION - DOWNLOAD THE FOLLOWING AT YOUR RISK ONLY (I did not check the file or the source and it may kill your Virus-Scanner or system) One example of a very huge CB is 42.zip http://mirror.delta5.com.br/2004/05/20/unforgettable.dk/ (42.374 bytes zipped) which expands to 4,5PB! Matti - Matti Haack - Hit Haack IT Service Gmbh Neuburger Strasse 35, D-94032 Passau +49 851 50477-22 Fax: +49 851 50477-29 http://www.haack-it.de Ausgehende E-Mail wurde auf Viren gescannt http://www.hit-gmbh.de To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
