Package: bash
Version: 4.2+dfsg-0.1+deb7u3 

This command 

$ b ash -c ' command_not_found_handle ( ) { echo this; } ; xxx' 

allows you to run arbitrary code ('echo this') . 
H ere 'xxx' must be the " name " of some non-existent command. 

The following variant 

$ b ash -c ' command_not_found_handle ( ) { xxx ; } ; xxx' 

makes Bash enter in a loop , memory usage runaway from 
control and the whole system hangs . 

Regards, 

Fernando Auil 

Reply via email to