81 lines
2.7 KiB
Diff
81 lines
2.7 KiB
Diff
From 4118bd2e1b1a31717f4c5355be5d83c121fa85dc Mon Sep 17 00:00:00 2001
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From: Samuel Cabrero <scabrero@suse.de>
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Date: Wed, 21 Dec 2022 18:17:57 +0100
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Subject: [PATCH 32/40] CVE-2022-38023 s3:rpc_server/netlogon: re-order
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checking in netr_creds_server_step_check()
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This will simplify the following changes.
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BUG: https://bugzilla.samba.org/show_bug.cgi?id=15240
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Signed-off-by: Samuel Cabrero <scabrero@samba.org>
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Conflict: NA
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Reference: https://attachments.samba.org/attachment.cgi?id=17736
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---
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source3/rpc_server/netlogon/srv_netlog_nt.c | 40 ++++++++++-----------
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1 file changed, 19 insertions(+), 21 deletions(-)
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diff --git a/source3/rpc_server/netlogon/srv_netlog_nt.c b/source3/rpc_server/netlogon/srv_netlog_nt.c
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index 8e907e60f7e..ba73fe3fa58 100644
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--- a/source3/rpc_server/netlogon/srv_netlog_nt.c
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+++ b/source3/rpc_server/netlogon/srv_netlog_nt.c
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@@ -1122,13 +1122,27 @@ static NTSTATUS netr_creds_server_step_check(struct pipes_struct *p,
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schannel_required = lp_bool(explicit_opt);
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}
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- if (schannel_required) {
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- if (auth_type == DCERPC_AUTH_TYPE_SCHANNEL) {
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- *creds_out = creds;
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- TALLOC_FREE(frame);
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- return NT_STATUS_OK;
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+ if (auth_type == DCERPC_AUTH_TYPE_SCHANNEL) {
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+ if (!schannel_required) {
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+ DBG_ERR("CVE-2020-1472(ZeroLogon): "
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+ "%s request (opnum[%u]) WITH schannel from "
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+ "client_account[%s] client_computer_name[%s]\n",
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+ opname, opnum,
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+ log_escape(frame, creds->account_name),
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+ log_escape(frame, creds->computer_name));
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+ }
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+ if (explicit_opt != NULL && !schannel_required) {
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+ DBG_ERR("CVE-2020-1472(ZeroLogon): "
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+ "Option 'server require schannel:%s = no' not needed!?\n",
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+ log_escape(frame, creds->account_name));
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}
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+ *creds_out = creds;
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+ TALLOC_FREE(frame);
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+ return NT_STATUS_OK;
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+ }
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+
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+ if (schannel_required) {
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DBG_ERR("CVE-2020-1472(ZeroLogon): "
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"%s request (opnum[%u]) without schannel from "
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"client_account[%s] client_computer_name[%s]\n",
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@@ -1155,22 +1169,6 @@ static NTSTATUS netr_creds_server_step_check(struct pipes_struct *p,
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warned_global_once = true;
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}
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- if (auth_type == DCERPC_AUTH_TYPE_SCHANNEL) {
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- DBG_ERR("CVE-2020-1472(ZeroLogon): "
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- "%s request (opnum[%u]) WITH schannel from "
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- "client_account[%s] client_computer_name[%s]\n",
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- opname, opnum,
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- log_escape(frame, creds->account_name),
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- log_escape(frame, creds->computer_name));
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- DBG_ERR("CVE-2020-1472(ZeroLogon): "
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- "Option 'server require schannel:%s = no' not needed!?\n",
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- log_escape(frame, creds->account_name));
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-
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- *creds_out = creds;
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- TALLOC_FREE(frame);
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- return NT_STATUS_OK;
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- }
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-
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if (explicit_opt != NULL) {
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DBG_INFO("CVE-2020-1472(ZeroLogon): "
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"%s request (opnum[%u]) without schannel from "
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--
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2.39.0
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