Hi... After installing Redhat 6.0, I looked around a bit and I
noticed something interesting:
In /home/httpd/cgi-bin there is a CGI program called cachemgr.cgi,
and it can be accessed by remote users by default.
So I went to look at it, and I noticed that what it does is it
lets any user connect to any hostname/port he/she chooses via the
interface it provides.. and then see the connection results -
if the connection was not successful it prints out the full connect() error;
otherwise it just stays frozen, waiting for HTTP data, or httpd might
give you an "Internal Server Error" - Both of those mean that a connection
has been established.
This is what it looks like from lynx:
Cache Manager Interface
This is a WWW interface to the instrumentation interface for the Squid
object cache.
_________________________________________________________________
Cache Host: localhost_____________________
Cache Port: 3128__________________________
Manager name: ______________________________
Password: ______________________________
Continue...
This is, obviously, not good, because this CGI program can be used as a
powerful portscanning or a denial of service tool. I suggest that Redhat
6.0 users check to see if they have it, and then disable it if they do.
- Daniel (danielat_private)
This archive was generated by hypermail 2b30 : Fri Apr 13 2001 - 14:53:17 PDT