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From 32ebaa0dbca5d0bb86e384e72bebc153f48413e4 Mon Sep 17 00:00:00 2001
From: "djm@openbsd.org" <djm@openbsd.org>
Date: Wed, 23 Feb 2022 11:18:13 +0000
Subject: [PATCH] upstream: avoid integer overflow of auth attempts
(harmless,caught by monitor)
OpenBSD-Commit-ID: 488ad570b003b21e0cd9e7a00349cfc1003b4d86
Reference:https://github.com/openssh/openssh-portable/commit/32ebaa0dbca5d0
Conflict:NA
---
auth2.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/auth2.c b/auth2.c
index 7290d54..0de58e6 100644
--- a/auth2.c
+++ b/auth2.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: auth2.c,v 1.161 2021/04/03 06:18:40 djm Exp $ */
+/* $OpenBSD: auth2.c,v 1.164 2022/02/23 11:18:13 djm Exp $ */
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
*
@@ -290,6 +290,8 @@ if (options.check_user_splash)
if ((style = strchr(user, ':')) != NULL)
*style++ = 0;
+ if (authctxt->attempt >= 1024)
+ auth_maxtries_exceeded(ssh);
if (authctxt->attempt++ == 0) {
/* setup auth context */
authctxt->pw = PRIVSEP(getpwnamallow(ssh, user));
@@ -298,6 +300,7 @@ if (options.check_user_splash)
authctxt->valid = 1;
debug2_f("setting up authctxt for %s", user);
} else {
+ authctxt->valid = 0;
/* Invalid user, fake password information */
authctxt->pw = fakepw();
}
--
2.23.0
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