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NAS-122455 / s3/winbindd - prevent lookup_name recursion #299

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NAS-122455 / s3/winbindd - prevent lookup_name recursion #299

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16 changes: 16 additions & 0 deletions source3/winbindd/wb_lookupname.c
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,8 @@
#include "includes.h"
#include "winbindd.h"
#include "librpc/gen_ndr/ndr_winbind_c.h"
#include "passdb/lookup_sid.h" /* only for LOOKUP flags */
#include "passdb/machine_sid.h"
#include "../libcli/security/security.h"

struct wb_lookupname_state {
Expand Down Expand Up @@ -74,6 +76,20 @@ struct tevent_req *wb_lookupname_send(TALLOC_CTX *mem_ctx,
return tevent_req_post(req, ev);
}

if (flags == (LOOKUP_NAME_NO_NSS | LOOKUP_NAME_REMOTE)) {
if (dom_sid_compare_domain(&domain->sid,
get_global_sam_sid()) == 0) {
D_NOTICE("Domain [%s] is our local domain, "
"skipping recursive lookup\n",
dom_name);

tevent_req_nterror(req, NT_STATUS_NONE_MAPPED);
return tevent_req_post(req, ev);
}

flags &= ~LOOKUP_NAME_REMOTE;
}

subreq = dcerpc_wbint_LookupName_send(
state, ev, dom_child_handle(domain),
state->dom_name, state->name,
Expand Down
2 changes: 1 addition & 1 deletion source3/winbindd/winbindd_getgroups.c
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Original file line number Diff line number Diff line change
Expand Up @@ -90,7 +90,7 @@ struct tevent_req *winbindd_getgroups_send(TALLOC_CTX *mem_ctx,
state->namespace,
state->domname,
state->username,
LOOKUP_NAME_NO_NSS);
LOOKUP_NAME_NO_NSS | LOOKUP_NAME_REMOTE);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
Expand Down
2 changes: 1 addition & 1 deletion source3/winbindd/winbindd_getpwnam.c
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Original file line number Diff line number Diff line change
Expand Up @@ -87,7 +87,7 @@ struct tevent_req *winbindd_getpwnam_send(TALLOC_CTX *mem_ctx,
state->namespace,
state->domname,
state->username,
LOOKUP_NAME_NO_NSS);
LOOKUP_NAME_NO_NSS | LOOKUP_NAME_REMOTE);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
Expand Down