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Re: [bug-inetutils] "echo" dgram service in *inetd and UDP packets with
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From: |
Alfred M. Szmidt |
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Subject: |
Re: [bug-inetutils] "echo" dgram service in *inetd and UDP packets with source port 7 |
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Date: |
Thu, 27 Nov 2014 16:55:52 -0500 |
Then upon receiving that packet, HOSTB will send the same packet
reversed to HOSTA and we'll start a ping-pong game that will only
stop when someone drops the ball (tested on Debian with
inetutils-inetd and openbsd-inetd, not xinetd but I assume it's the
same).
Which version?
The echo protocol is a debugging and measurement tool, it is not
supposed to be used for security sensetive tools. It would also be a
violation of RFC 862 to change the behaviour in this format, where it
is allowed to induce this kinda of a loop.