Re: How to fix the ptrace flaw without rebooting

[Paul Jakma]

On 4 Apr 2003, Alan Cox wrote:

> Thats not a sufficient fix except for people blindly running the
> example exploit

Also, removing CAP_SYS_PTRACE from the capability bounded set does
not close the hole (well, as shown by the exploit) either. It seems
CAP_SYS_PTRACE only closes the case of PTRACE_ATTACH, all other
ptrace()'s work, eg PTRACE_TRACEME -> strace echo foo and the exploit 
works too.

Should CAP_SYS_PTRACE not do as the name suggests and completely 
disallow ptrace()? (not just PTRACE_ATTACH).

regards,
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