114 lines
4.4 KiB
Diff
114 lines
4.4 KiB
Diff
From b9269801ed6bc034da924cdedd0b6a2938a1379f Mon Sep 17 00:00:00 2001
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From: Stefan Metzmacher <metze@samba.org>
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Date: Mon, 12 Dec 2022 14:03:50 +0100
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Subject: [PATCH 10/29] CVE-2022-38023 s4:rpc_server/netlogon: add
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talloc_stackframe() to dcesrv_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: Stefan Metzmacher <metze@samba.org>
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Reviewed-by: Andrew Bartlett <abartlet@samba.org>
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Reviewed-by: Ralph Boehme <slow@samba.org>
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(cherry picked from commit 0e6a2ba83ef1be3c6a0f5514c21395121621a145)
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Conflict: NA
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Reference: https://attachments.samba.org/attachment.cgi?id=17698
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---
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source4/rpc_server/netlogon/dcerpc_netlogon.c | 32 +++++++++++--------
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1 file changed, 19 insertions(+), 13 deletions(-)
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diff --git a/source4/rpc_server/netlogon/dcerpc_netlogon.c b/source4/rpc_server/netlogon/dcerpc_netlogon.c
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index b85d2253d3c4..5dfd84d939d9 100644
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--- a/source4/rpc_server/netlogon/dcerpc_netlogon.c
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+++ b/source4/rpc_server/netlogon/dcerpc_netlogon.c
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@@ -634,6 +634,7 @@ static NTSTATUS dcesrv_netr_creds_server_step_check(struct dcesrv_call_state *dc
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struct netlogon_creds_CredentialState **creds_out)
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{
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struct loadparm_context *lp_ctx = dce_call->conn->dce_ctx->lp_ctx;
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+ TALLOC_CTX *frame = talloc_stackframe();
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NTSTATUS nt_status;
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int schannel = lpcfg_server_schannel(lp_ctx);
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bool schannel_global_required = (schannel == true);
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@@ -677,6 +678,7 @@ static NTSTATUS dcesrv_netr_creds_server_step_check(struct dcesrv_call_state *dc
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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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}
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@@ -684,13 +686,15 @@ static NTSTATUS dcesrv_netr_creds_server_step_check(struct dcesrv_call_state *dc
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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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opname, opnum,
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- log_escape(mem_ctx, creds->account_name),
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- log_escape(mem_ctx, creds->computer_name));
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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): Check if option "
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- "'server require schannel:%s = no' is needed! \n",
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- log_escape(mem_ctx, creds->account_name));
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+ "'server require schannel:%s = no' "
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+ "might be needed for a legacy client.\n",
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+ log_escape(frame, creds->account_name));
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TALLOC_FREE(creds);
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ZERO_STRUCTP(return_authenticator);
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+ TALLOC_FREE(frame);
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return NT_STATUS_ACCESS_DENIED;
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}
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@@ -699,13 +703,14 @@ static NTSTATUS dcesrv_netr_creds_server_step_check(struct dcesrv_call_state *dc
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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(mem_ctx, creds->account_name),
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- log_escape(mem_ctx, creds->computer_name));
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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(mem_ctx, creds->account_name));
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+ log_escape(frame, creds->account_name));
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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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@@ -715,24 +720,25 @@ static NTSTATUS dcesrv_netr_creds_server_step_check(struct dcesrv_call_state *dc
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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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opname, opnum,
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- log_escape(mem_ctx, creds->account_name),
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- log_escape(mem_ctx, creds->computer_name));
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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_INFO("CVE-2020-1472(ZeroLogon): "
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"Option 'server require schannel:%s = no' still needed!\n",
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- log_escape(mem_ctx, creds->account_name));
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+ log_escape(frame, creds->account_name));
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} else {
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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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opname, opnum,
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- log_escape(mem_ctx, creds->account_name),
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- log_escape(mem_ctx, creds->computer_name));
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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): Check if option "
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"'server require schannel:%s = no' might be needed!\n",
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- log_escape(mem_ctx, creds->account_name));
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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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2.34.1
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