In Electric Coin Company Zcashd before 2.1.1-1, the time offset between messages could be leveraged to obtain sensitive information about the relationship between a suspected victim's address and an IP address, aka a timing side channel.
Link | Tags |
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https://electriccoin.co/blog/new-releases-2-1-1-and-hotfix-2-1-1-1/ | release notes vendor advisory |