Master various reported fixes #713
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Reported by guidov
Essentially, one can send such a large amount of IDs that core exhausts all free memory. This issue can theoretically be exploited using very large CN blockchains, such as Monero. This is a partial fix. Thanks and credit given to CryptoNote author 'cryptozoidberg' for collaboration and the fix. Also thanks to 'moneromooo'. Referencing HackerOne report #506595.
Count transactions as well
Large amounts might run out of stack Reported by guidov
just in case
NULL is valid when size is 0, but memcpy uses nonnull attributes, so let's not poke the bear
* Drop connection when requesting duplicated tx indexes * Use insert's returned iterator to dupe check
Doy-lee
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