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From 499fd673befa6fed6bd0e542d9bb06cb49bd150e Mon Sep 17 00:00:00 2001
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From: Andreas Schneider <asn@samba.org>
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Date: Thu, 11 Apr 2019 11:40:11 +0200
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Subject: [PATCH 198/208] s3:param: Only allow SMB 3.0+ for DCERPC client
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connections over named pipes
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We need an AES encrypted transport as some RPC services only encrypt
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secrets using RC4, e.g. password changes over SAMR.
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Signed-off-by: Andreas Schneider <asn@samba.org>
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---
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source3/param/loadparm.c | 9 +++++++++
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1 file changed, 9 insertions(+)
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diff --git a/source3/param/loadparm.c b/source3/param/loadparm.c
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index b52e2bcb036..c1d02cf5bc6 100644
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--- a/source3/param/loadparm.c
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+++ b/source3/param/loadparm.c
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@@ -4614,6 +4614,15 @@ int lp_client_max_protocol(void)
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int lp_client_ipc_min_protocol(void)
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{
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int client_ipc_min_protocol = lp__client_ipc_min_protocol();
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+
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+ /*
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+ * If weak crypto is not allowed, force at least SMB3 which offers AES
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+ * encrypted connections.
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+ */
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+ if (lp_weak_crypto() == SAMBA_WEAK_CRYPTO_DISALLOWED) {
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+ return MAX(client_ipc_min_protocol, PROTOCOL_SMB3_00);
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+ }
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+
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if (client_ipc_min_protocol == PROTOCOL_DEFAULT) {
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client_ipc_min_protocol = lp_client_min_protocol();
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}
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--
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2.23.0
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