I've tested this exploit in wrong way. I've first logged in as root, then I
made "su nobody" and then exploit worked.

If I don't login as root at the beginning, I get operation not permited.. so
kernel is safe after all :)

Thanks 4 your time


Best regards,

Bojan Pogacar


> Hello,
>
> I've upgraded my linux box to 2.4.21 because of the securety reasons. Now
I
> found out that old local expoloit for ptrace is stil working under 2.4.21.
> Wasn't it fixed in RC1?
>
> In attachment I send you exploit, which is still working!
>
>
> Best regards,
>
> Bojan Pogacar
>