[lkml]   [2005]   [Sep]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: security patch
    On Thu, 22 Sep 2005 19:44:33 -0000, said:

    > I'm doing a new feature for linux kernel 2.6 to protect against all kinds of buffer
    > overflow. It works with new sys_control() system call controling if a process can or can't
    > call a system call ie. sys_execve();

    This has been done before. ;)

    Also, note *VERY* carefully that this does *NOT* protect against buffer overflow
    the way ExecShield and PAX and similar do - this merely tries to mitigate the

    Note that you probably don't *DARE* remove open()/read()/write()/close() from
    the "permitted syscall" list - and an attacker can have plenty of fun just with
    those 4 syscalls.

    (That's also why SELinux was designed to give better granularity to syscalls - it
    can restrict a program to "write only to files it *should* be able to write").
    [unhandled content-type:application/pgp-signature]
     \ /
      Last update: 2005-09-22 22:06    [W:0.019 / U:2.024 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site