On Mon, Jul 23, 2012 at 3:37 AM, Felix Rublack <frubi1...@gmail.com> wrote: > Package: netcat-openbsd > Version: 1.105-7 > Severity: normal > > If netcat is used to connect to a closed local port, it may connect to itself. > > How to reproduce: > > 1) Select a random port from the range which is used by clients > # sysctl net.ipv4.ip_local_port_range > > 2) Start netcat in loop with this port > # while true; do nc.openbsd -v localhost 52804 < /dev/zero; done > nc.openbsd: connect to localhost port 52804 (tcp) failed: Connection refused > nc.openbsd: connect to localhost port 52804 (tcp) failed: Connection refused > [....] > nc.openbsd: connect to localhost port 52804 (tcp) failed: Connection refused > nc.openbsd: connect to localhost port 52804 (tcp) failed: Connection refused > Connection to localhost 52804 port [tcp/*] succeeded! > > It shouldn't do this :) >
This is interesting... I don't know why it behaves like this, and I can reproduce it without very clear influencing factors. I'll spend some time on it next weekend or the weekend after next. Thanks for your catching out! -- Regards, Aron Xu -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
