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cryptonote_protocol: reject requests/notifications before handshake 

Reported by xnbya
This commit is contained in:
moneromooo-monero 2020-05-17 13:48:40 +00:00
parent 77a008f714
commit bb5c5dff15
No known key found for this signature in database
GPG Key ID: 686F07454D6CEFC3
1 changed files with 20 additions and 0 deletions
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20
src/cryptonote_protocol/cryptonote_protocol_handler.inl
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@ -793,6 +793,12 @@ namespace cryptonote
int t_cryptonote_protocol_handler<t_core>::handle_request_fluffy_missing_tx(int command, NOTIFY_REQUEST_FLUFFY_MISSING_TX::request& arg, cryptonote_connection_context& context) int t_cryptonote_protocol_handler<t_core>::handle_request_fluffy_missing_tx(int command, NOTIFY_REQUEST_FLUFFY_MISSING_TX::request& arg, cryptonote_connection_context& context)
{ {
MLOG_P2P_MESSAGE("Received NOTIFY_REQUEST_FLUFFY_MISSING_TX (" << arg.missing_tx_indices.size() << " txes), block hash " << arg.block_hash); MLOG_P2P_MESSAGE("Received NOTIFY_REQUEST_FLUFFY_MISSING_TX (" << arg.missing_tx_indices.size() << " txes), block hash " << arg.block_hash);
if (context.m_state == cryptonote_connection_context::state_before_handshake)
{
LOG_ERROR_CCONTEXT("Requested fluffy tx before handshake, dropping connection");
drop_connection(context, false, false);
return 1;
}
std::vector<std::pair<cryptonote::blobdata, block>> local_blocks; std::vector<std::pair<cryptonote::blobdata, block>> local_blocks;
std::vector<cryptonote::blobdata> local_txs; std::vector<cryptonote::blobdata> local_txs;
@ -884,6 +890,8 @@ namespace cryptonote
int t_cryptonote_protocol_handler<t_core>::handle_notify_get_txpool_complement(int command, NOTIFY_GET_TXPOOL_COMPLEMENT::request& arg, cryptonote_connection_context& context) int t_cryptonote_protocol_handler<t_core>::handle_notify_get_txpool_complement(int command, NOTIFY_GET_TXPOOL_COMPLEMENT::request& arg, cryptonote_connection_context& context)
{ {
MLOG_P2P_MESSAGE("Received NOTIFY_GET_TXPOOL_COMPLEMENT (" << arg.hashes.size() << " txes)"); MLOG_P2P_MESSAGE("Received NOTIFY_GET_TXPOOL_COMPLEMENT (" << arg.hashes.size() << " txes)");
if(context.m_state != cryptonote_connection_context::state_normal)
return 1;
std::vector<std::pair<cryptonote::blobdata, block>> local_blocks; std::vector<std::pair<cryptonote::blobdata, block>> local_blocks;
std::vector<cryptonote::blobdata> local_txs; std::vector<cryptonote::blobdata> local_txs;
@ -987,6 +995,12 @@ namespace cryptonote
template<class t_core> template<class t_core>
int t_cryptonote_protocol_handler<t_core>::handle_request_get_objects(int command, NOTIFY_REQUEST_GET_OBJECTS::request& arg, cryptonote_connection_context& context) int t_cryptonote_protocol_handler<t_core>::handle_request_get_objects(int command, NOTIFY_REQUEST_GET_OBJECTS::request& arg, cryptonote_connection_context& context)
{ {
if (context.m_state == cryptonote_connection_context::state_before_handshake)
{
LOG_ERROR_CCONTEXT("Requested objects before handshake, dropping connection");
drop_connection(context, false, false);
return 1;
}
MLOG_P2P_MESSAGE("Received NOTIFY_REQUEST_GET_OBJECTS (" << arg.blocks.size() << " blocks)"); MLOG_P2P_MESSAGE("Received NOTIFY_REQUEST_GET_OBJECTS (" << arg.blocks.size() << " blocks)");
if (arg.blocks.size() > CURRENCY_PROTOCOL_MAX_OBJECT_REQUEST_COUNT) if (arg.blocks.size() > CURRENCY_PROTOCOL_MAX_OBJECT_REQUEST_COUNT)
{ {
@ -1717,6 +1731,12 @@ skip:
int t_cryptonote_protocol_handler<t_core>::handle_request_chain(int command, NOTIFY_REQUEST_CHAIN::request& arg, cryptonote_connection_context& context) int t_cryptonote_protocol_handler<t_core>::handle_request_chain(int command, NOTIFY_REQUEST_CHAIN::request& arg, cryptonote_connection_context& context)
{ {
MLOG_P2P_MESSAGE("Received NOTIFY_REQUEST_CHAIN (" << arg.block_ids.size() << " blocks"); MLOG_P2P_MESSAGE("Received NOTIFY_REQUEST_CHAIN (" << arg.block_ids.size() << " blocks");
if (context.m_state == cryptonote_connection_context::state_before_handshake)
{
LOG_ERROR_CCONTEXT("Requested chain before handshake, dropping connection");
drop_connection(context, false, false);
return 1;
}
NOTIFY_RESPONSE_CHAIN_ENTRY::request r; NOTIFY_RESPONSE_CHAIN_ENTRY::request r;
if(!m_core.find_blockchain_supplement(arg.block_ids, !arg.prune, r)) if(!m_core.find_blockchain_supplement(arg.block_ids, !arg.prune, r))
{ {