Re: 2.4+ptrace exploit fix breaks root's ability to strace

Alan Cox
2003-03-22T17:46:02Z

On Sat, 2003-03-22 at 17:13, Russell King wrote:
> ptrace has always explicitly allowed a process with the CAP_SYS_PTRACE
> capability to ptrace a task which isn't dumpable. With the ptrace "fix"
> in place, you can attach to a non-dumpable thread:

Note that this is a bug, and is now a fixed bug. The looser check you
can do requires you check

my_capabilities >= his capbilities

Otherwise you have priviledge escalation for CAP_SYS_PTRACE to
CAP_SYS_RAWIO trivially