PuTTY bug freebsd-4.6-ki-crash

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summary: SSH-2 keyboard-interactive crashes with FreeBSD 4.6-STABLE
class: bug: This is clearly an actual problem we want fixed.
absent-in: 0.51
present-in: 0.52 2002-07-31 2002-08-01
fixed-in: 2002-08-04 949cecd569fc1f6876f35cb19a067462add74ab8 0.53

Various people have reported PuTTY crashing when connecting to recent FreeBSD OpenSSH servers. Most commonly after upgrading to FreeBSD 4.6-STABLE (server version "OpenSSH_3.4p1 FreeBSD-20020702"), although there are minor variations. Use of keyboard-interactive authentication (e.g., PAM, OPIE) with SSH-2 appears to be a common factor.

A workaround is to disable use of keyboard-interactive auth (either in PuTTY, or on the server with "ChallengeResponseAuthentication no").

Update: we believe that this is fixed as of the 2002-08-04 snapshot (and we've had confirmation from one of the original reporters).

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(last revision of this bug record was at 2016-12-27 11:40:22 +0000)