[CentOS] Serious attack vector on pkcheck ignored by Red Hat

[Gordon Messmer]

On 02/15/2017 12:08 PM, Valeri Galtsev wrote:
> /run/screen/S-<user> - NOT on CentOS 5
> /var/spool/samba - NOT on CentOS 5 that needs extra security - in our shop;


To be pedantic: screen definitely creates a user-writable directory on 
CentOS 5, in a different location, and samba will include that directory 
if installed.  It can be really hard to make sure everything required is 
mounted noexec when some of these directories are automatically created 
by SUID or SGID binaries, in response to user actions.