From 37be06461f35ca8ff23a1339305b00eb6ee66c33 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?=
 <emulatorman@parabola.nu>
Date: Thu, 23 Jul 2015 23:23:38 -0300
Subject: openssh-knock-6.9p1-2: fix
 https://kingcope.wordpress.com/2015/07/16/openssh-keyboard-interactive-authentication-brute-force-vulnerability-maxauthtries-bypass/

---
 pcr/openssh-knock/keyboard-interactive.patch | 52 ++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 pcr/openssh-knock/keyboard-interactive.patch

(limited to 'pcr/openssh-knock/keyboard-interactive.patch')

diff --git a/pcr/openssh-knock/keyboard-interactive.patch b/pcr/openssh-knock/keyboard-interactive.patch
new file mode 100644
index 000000000..4adafebc1
--- /dev/null
+++ b/pcr/openssh-knock/keyboard-interactive.patch
@@ -0,0 +1,52 @@
+From 5b64f85bb811246c59ebab70aed331f26ba37b18 Mon Sep 17 00:00:00 2001
+From: "djm@openbsd.org" <djm@openbsd.org>
+Date: Sat, 18 Jul 2015 07:57:14 +0000
+Subject: upstream commit
+
+only query each keyboard-interactive device once per
+ authentication request regardless of how many times it is listed; ok markus@
+
+Upstream-ID: d73fafba6e86030436ff673656ec1f33d9ffeda1
+---
+ auth2-chall.c | 11 ++++++++---
+ 1 file changed, 8 insertions(+), 3 deletions(-)
+
+diff --git a/auth2-chall.c b/auth2-chall.c
+index ddabe1a..4aff09d 100644
+--- a/auth2-chall.c
++++ b/auth2-chall.c
+@@ -1,4 +1,4 @@
+-/* $OpenBSD: auth2-chall.c,v 1.42 2015/01/19 20:07:45 markus Exp $ */
++/* $OpenBSD: auth2-chall.c,v 1.43 2015/07/18 07:57:14 djm Exp $ */
+ /*
+  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
+  * Copyright (c) 2001 Per Allansson.  All rights reserved.
+@@ -83,6 +83,7 @@ struct KbdintAuthctxt
+ 	void *ctxt;
+ 	KbdintDevice *device;
+ 	u_int nreq;
++	u_int devices_done;
+ };
+ 
+ #ifdef USE_PAM
+@@ -169,11 +170,15 @@ kbdint_next_device(Authctxt *authctxt, KbdintAuthctxt *kbdintctxt)
+ 		if (len == 0)
+ 			break;
+ 		for (i = 0; devices[i]; i++) {
+-			if (!auth2_method_allowed(authctxt,
++			if ((kbdintctxt->devices_done & (1 << i)) != 0 ||
++			    !auth2_method_allowed(authctxt,
+ 			    "keyboard-interactive", devices[i]->name))
+ 				continue;
+-			if (strncmp(kbdintctxt->devices, devices[i]->name, len) == 0)
++			if (strncmp(kbdintctxt->devices, devices[i]->name,
++			    len) == 0) {
+ 				kbdintctxt->device = devices[i];
++				kbdintctxt->devices_done |= 1 << i;
++			}
+ 		}
+ 		t = kbdintctxt->devices;
+ 		kbdintctxt->devices = t[len] ? xstrdup(t+len+1) : NULL;
+-- 
+cgit v0.11.2
+
-- 
cgit v1.2.3-2-g168b