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Handle no more entries response from ept_lookup rpc call #1849

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Handle no more entries response from ept_lookup rpc call #1849

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9 changes: 8 additions & 1 deletion impacket/dcerpc/v5/epm.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1233,7 +1233,13 @@ def hept_lookup(destHost, inquiry_type = RPC_C_EP_ALL_ELTS, objectUUID = NULL, i
request['entry_handle'] = entry_handle
request['max_ents'] = 500

resp = dce.request(request)
try:
resp = dce.request(request)
except DCERPCException as e:
# [MS-RPCE]: Section 2.2.1.2.4 specify ept_lookup should return 0x16C9A0D6 when no more entries
if e.error_code == 0x16c9a0d6:
break
raise e

for i in range(resp['num_ents']):
tmpEntry = {}
Expand All @@ -1244,6 +1250,7 @@ def hept_lookup(destHost, inquiry_type = RPC_C_EP_ALL_ELTS, objectUUID = NULL, i
entries.append(tmpEntry)

entry_handle = resp['entry_handle']
# However MSAD implementation seems to never return 0x16C9A0D6 but instead return an empty handle to notify end of elements
if entry_handle.isNull():
break

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