File openssh-7.2p2-limit_password_length.patch of Package openssh.29886

From 5d8e8cb8701203916c7a3916d69061c8db316552 Mon Sep 17 00:00:00 2001
From: Old openssh patches <pcerny@suse.com>
Date: Wed, 26 Oct 2022 09:54:39 +0200
Subject: [PATCH] openssh-7.2p2-limit_password_length

# HG changeset patch
# Parent  60b6265db17515fff0b2ae97c00092465bbd4e26
Limit accepted passwords length to prevent DoS by resource consumption
(via crypt() eating CPU cycles).

CVE-2016-6515
bsc#992533

upstream commit: fcd135c9df440bcd2d5870405ad3311743d78d97
---
 auth-passwd.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/auth-passwd.c b/auth-passwd.c
index 530b5d4f..a574ecea 100644
--- a/auth-passwd.c
+++ b/auth-passwd.c
@@ -66,6 +66,8 @@ extern login_cap_t *lc;
 #define DAY		(24L * 60 * 60) /* 1 day in seconds */
 #define TWO_WEEKS	(2L * 7 * DAY)	/* 2 weeks in seconds */
 
+#define MAX_PASSWORD_LEN	1024
+
 void
 disable_forwarding(void)
 {
@@ -87,6 +89,9 @@ auth_password(Authctxt *authctxt, const char *password)
 	static int expire_checked = 0;
 #endif
 
+	if (strlen(password) > MAX_PASSWORD_LEN)
+		return 0;
+
 #ifndef HAVE_CYGWIN
 	if (pw->pw_uid == 0 && options.permit_root_login != PERMIT_YES)
 		ok = 0;
-- 
2.38.0