Re: COSEINC Linux Advisory #1: Linux Kernel Parent Process Death Signal Vulnerability

[Wojciech Purczynski <cliph () isec pl>]

> I'm not sure this is a real security issue. If some process has the same
> effective UID as the given one, the former can always send any signal to
> the latter. Thus the behaviour you described is IMHO normal.

It becomes a security issue whenever suid process drops user's UIDs.