diff options
| author | djm <djm> | 2014-01-09 23:59:24 +0000 |
|---|---|---|
| committer | djm <djm> | 2014-01-09 23:59:24 +0000 |
| commit | 97efc2dee099e942683b71888780793db38a5944 (patch) | |
| tree | 98c9b8d6469fb1a90ef084e4fc9d76e165e56b7a /sshconnect.c | |
| parent | e057c06b0cb4dd512d3c166856b40447d849a3b1 (diff) | |
| download | openssh-97efc2dee099e942683b71888780793db38a5944.tar.gz | |
- djm@cvs.openbsd.org 2014/01/09 23:26:48
[sshconnect.c sshd.c]
ban clients/servers that suffer from SSH_BUG_DERIVEKEY, they are ancient,
deranged and might make some attacks on KEX easier; ok markus@
Diffstat (limited to 'sshconnect.c')
| -rw-r--r-- | sshconnect.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sshconnect.c b/sshconnect.c index 791b31c1..d21781ea 100644 --- a/sshconnect.c +++ b/sshconnect.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sshconnect.c,v 1.243 2013/12/30 23:52:27 djm Exp $ */ +/* $OpenBSD: sshconnect.c,v 1.244 2014/01/09 23:26:48 djm Exp $ */ /* * Author: Tatu Ylonen <ylo@cs.hut.fi> * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland @@ -662,6 +662,9 @@ ssh_exchange_identification(int timeout_ms) fatal("Protocol major versions differ: %d vs. %d", (options.protocol & SSH_PROTO_2) ? PROTOCOL_MAJOR_2 : PROTOCOL_MAJOR_1, remote_major); + if ((datafellows & SSH_BUG_DERIVEKEY) != 0) + fatal("Server version \"%.100s\" uses unsafe key agreement; " + "refusing connection", remote_version); if ((datafellows & SSH_BUG_RSASIGMD5) != 0) logit("Server version \"%.100s\" uses unsafe RSA signature " "scheme; disabling use of RSA keys", remote_version); |