Re: Security impact of lmtpd with pre-auth

2009-07-09 Thread Andrew Morgan
On Thu, 9 Jul 2009, Reinaldo de Carvalho wrote: > On Thu, Jul 9, 2009 at 2:05 AM, Pascal > Gienger wrote: >> >> Imagine a Cyrus Box only accepting LMTP connections, no sendmail, no >> Postfix, no other SMTP MTA running on it. >> Then imagine a frontend smtp relay delivering directly via LMTP over

Re: Security impact of lmtpd with pre-auth

2009-07-09 Thread Reinaldo de Carvalho
On Thu, Jul 9, 2009 at 2:05 AM, Pascal Gienger wrote: > > Imagine a Cyrus Box only accepting LMTP connections, no sendmail, no > Postfix, no other SMTP MTA running on it. > Then imagine a frontend smtp relay delivering directly via LMTP over TCP > to your Cyrus box. You can use lmtp auth then to pr

Re: Security impact of lmtpd with pre-auth

2009-07-08 Thread Pascal Gienger
Nikolaus Rath schrieb: > But unless I have some exotic filtering and/or rate limiting configured, > he can do exactly the same thing by connecting to localhost:smtp, or > invoking sendmail directy, can't he? So why the additional protection > for lmtp? Imagine a Cyrus Box only accepting LMTP conn

Re: Security impact of lmtpd with pre-auth

2009-07-08 Thread Nikolaus Rath
Andrew Morgan writes: > On Wed, 8 Jul 2009, Pascal Gienger wrote: > >> Nikolaus Rath schrieb: >>> Hello, >>> >>> Apparently (http://wiki.exim.org/CyrusImap) I need to let lmtpd accept >>> connections from localhost as pre-authenticated to make cyrus and exim >>> work nicely together. >>> >>> Can s

Re: Security impact of lmtpd with pre-auth

2009-07-08 Thread Andrew Morgan
On Wed, 8 Jul 2009, Pascal Gienger wrote: > Nikolaus Rath schrieb: >> Hello, >> >> Apparently (http://wiki.exim.org/CyrusImap) I need to let lmtpd accept >> connections from localhost as pre-authenticated to make cyrus and exim >> work nicely together. >> >> Can someone explain what this actually

Re: Security impact of lmtpd with pre-auth

2009-07-07 Thread Pascal Gienger
Nikolaus Rath schrieb: > Hello, > > Apparently (http://wiki.exim.org/CyrusImap) I need to let lmtpd accept > connections from localhost as pre-authenticated to make cyrus and exim > work nicely together. > > Can someone explain what this actually means security wise? I.e. what > could a malicious