From d079628a43f845522598be7efa0abf5e478549c6 Mon Sep 17 00:00:00 2001
From: Stefan Metzmacher <metze@samba.org>
Date: Fri, 8 Oct 2021 18:08:20 +0200
Subject: [PATCH 119/266] CVE-2020-25717: s3:auth: no longer let
 check_account() autocreate local users

So far we autocreated local user accounts based on just the
account_name (just ignoring any domain part).

This only happens via a possible 'add user script',
which is not typically defined on domain members
and on NT4 DCs local users already exist in the
local passdb anyway.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14556
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14801

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
---
 source3/auth/auth_util.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Conflict:NA
Reference:https://git.samba.org/samba.git/?p=samba.git;a=patch;h=d079628a43f845522598be7efa0abf5e478549c6

diff --git a/source3/auth/auth_util.c b/source3/auth/auth_util.c
index 4de4bc74374..99b85d47a5f 100644
--- a/source3/auth/auth_util.c
+++ b/source3/auth/auth_util.c
@@ -1898,7 +1898,7 @@ static NTSTATUS check_account(TALLOC_CTX *mem_ctx, const char *domain,
 		return NT_STATUS_NO_MEMORY;
 	}
 
-	passwd = smb_getpwnam(mem_ctx, dom_user, &real_username, true );
+	passwd = smb_getpwnam(mem_ctx, dom_user, &real_username, false);
 	if (!passwd) {
 		DEBUG(3, ("Failed to find authenticated user %s via "
 			  "getpwnam(), denying access.\n", dom_user));
-- 
2.23.0

