protocol: more restrictive checks on chain entry response

remotes/1691602464505633909/tmp_refs/heads/wonerujo-v0.10.1
moneromooo-monero 3 years ago
parent 065bb292df
commit f47f1a0691
No known key found for this signature in database
GPG Key ID: 686F07454D6CEFC3

@ -2428,7 +2428,7 @@ skip:
drop_connection(context, true, false);
return 1;
}
if (arg.total_height < arg.m_block_ids.size() || arg.start_height > arg.total_height - arg.m_block_ids.size())
if (arg.total_height < arg.m_block_ids.size() || arg.start_height > arg.total_height - arg.m_block_ids.size() || arg.start_height >= m_core.get_current_blockchain_height())
{
LOG_ERROR_CCONTEXT("sent invalid start/nblocks/height, dropping connection");
drop_connection(context, true, false);
@ -2469,8 +2469,15 @@ skip:
context.m_needed_objects.clear();
uint64_t added = 0;
std::unordered_set<crypto::hash> blocks_found;
for (size_t i = 0; i < arg.m_block_ids.size(); ++i)
{
if (!blocks_found.insert(arg.m_block_ids[i]).second)
{
LOG_ERROR_CCONTEXT("Duplicate blocks in chain entry response, dropping connection");
drop_connection(context, true, false);
return 1;
}
const uint64_t block_weight = arg.m_block_weights.empty() ? 0 : arg.m_block_weights[i];
context.m_needed_objects.push_back(std::make_pair(arg.m_block_ids[i], block_weight));
if (++added == n_use_blocks)

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