- djm@cvs.openbsd.org 2014/04/18 23:52:25
[compat.c compat.h sshconnect2.c sshd.c version.h]
OpenSSH 6.5 and 6.6 have a bug that causes ~0.2% of connections
using the curve25519-sha256@libssh.org KEX exchange method to fail
when connecting with something that implements the spec properly.
Disable this KEX method when speaking to one of the affected
versions.
reported by Aris Adamantiadis; ok markus@
diff --git a/sshd.c b/sshd.c
index f0fc078..3ca722c 100644
--- a/sshd.c
+++ b/sshd.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: sshd.c,v 1.423 2014/04/12 04:55:53 djm Exp $ */
+/* $OpenBSD: sshd.c,v 1.424 2014/04/18 23:52:25 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -2438,6 +2438,9 @@
if (options.kex_algorithms != NULL)
myproposal[PROPOSAL_KEX_ALGS] = options.kex_algorithms;
+ myproposal[PROPOSAL_KEX_ALGS] = compat_kex_proposal(
+ myproposal[PROPOSAL_KEX_ALGS]);
+
if (options.rekey_limit || options.rekey_interval)
packet_set_rekey_limits((u_int32_t)options.rekey_limit,
(time_t)options.rekey_interval);