Date: Thu, 16 Apr 2009 07:59:20 -0400 (EDT) From: wietse@...cupine.org (Wietse Venema) To: Tomas Hoger <thoger@...hat.com> CC: coley@...us.mitre.org, oss-security@...ts.openwall.com, Wietse Venema <wietse@...cupine.org> Subject: Re: Re: Some fun with tcp_wrappers Tomas Hoger: > The good_client (tcp_wrappers wrapping function in portmap / > nfs-utils / ...) problem is rather interesting too, as it creates > problems due to its attempt to avoid unneeded DNS lookups (workaround > for hosts_ctl limitation?) and support host aliases (tcp_wrappers > limitation). See my previous email. Programs such as portmappers must not look up hostname information, since that would result in an infinite recursion when host lookups use SUNRPC services. To state the obvious: the portmapper would directly or indirectly send SUNRPC calls to itself, in order to locate the NIS server. Before discussing changes to a program, it is a good investment of time to find out how the program works, and why it works in the specific way it works. Wietse
Powered by blists - more mailing lists
Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.