CD79: lightning development, bugs, and the path forward
Citadel Dispatch
Exploiting a Class of Bugs Using HTLCs
In order to exploit this bug, you don't have to take that risk of broadcasting a stale state where someone can steal all of your funds. But in fact, you can do it using HTLCs as well. If the other peer patches in time, even if we did, even if someone did exploit this in the same block as Barak's, all it takes is you updating your L&D node in time. This kind of issue has bitten Bitcoin library deserialization libraries like LDK and Rust-Bitcoin.
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