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File _service:tar_scm_kernel_repo:backport-0015-CVE-2022-32743-s4-rpc_server-netlogon-Reconnect-to-s.patch of Package samba
From 15c86028a861139cee4560fe093c965ffc30eb13 Mon Sep 17 00:00:00 2001 From: Joseph Sutton <josephsutton@catalyst.net.nz> Date: Thu, 9 Jun 2022 19:46:07 +1200 Subject: [PATCH 15/15] CVE-2022-32743 s4:rpc_server/netlogon: Reconnect to samdb as workstation account This ensures that the database update can be attributed to the workstation account, rather than to the anonymous SID, in the audit logs. BUG: https://bugzilla.samba.org/show_bug.cgi?id=14833 Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz> Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz> Autobuild-User(master): Douglas Bagnall <dbagnall@samba.org> Autobuild-Date(master): Thu Jul 28 23:41:27 UTC 2022 on sn-devel-184 --- source4/rpc_server/netlogon/dcerpc_netlogon.c | 28 +++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/source4/rpc_server/netlogon/dcerpc_netlogon.c b/source4/rpc_server/netlogon/dcerpc_netlogon.c index 15cd27b..12ad780 100644 --- a/source4/rpc_server/netlogon/dcerpc_netlogon.c +++ b/source4/rpc_server/netlogon/dcerpc_netlogon.c @@ -2422,6 +2422,7 @@ static NTSTATUS dcesrv_netr_LogonGetDomainInfo(struct dcesrv_call_state *dce_cal struct ldb_dn *workstation_dn; struct netr_DomainInformation *domain_info; struct netr_LsaPolicyInformation *lsa_policy_info; + struct auth_session_info *workstation_session_info = NULL; uint32_t default_supported_enc_types = 0xFFFFFFFF; bool update_dns_hostname = true; int ret, i; @@ -2468,6 +2469,33 @@ static NTSTATUS dcesrv_netr_LogonGetDomainInfo(struct dcesrv_call_state *dce_cal dom_sid_string(mem_ctx, creds->sid)); NT_STATUS_HAVE_NO_MEMORY(workstation_dn); + /* Get the workstation's session info from the database. */ + status = authsam_get_session_info_principal(mem_ctx, + dce_call->conn->dce_ctx->lp_ctx, + sam_ctx, + NULL, /* principal */ + workstation_dn, + 0, /* session_info_flags */ + &workstation_session_info); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + /* + * Reconnect to samdb as the workstation, now that we have its + * session info. We do this so the database update can be + * attributed to the workstation account in the audit logs -- + * otherwise it might be incorrectly attributed to + * SID_NT_ANONYMOUS. + */ + sam_ctx = dcesrv_samdb_connect_session_info(mem_ctx, + dce_call, + workstation_session_info, + workstation_session_info); + if (sam_ctx == NULL) { + return NT_STATUS_INVALID_SYSTEM_SERVICE; + } + /* Lookup for attributes in workstation object */ ret = gendb_search_dn(sam_ctx, mem_ctx, workstation_dn, &res1, attrs2); -- 1.8.3.1
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