Impact

A parsing vulnerability in lnd’s onion processing logic led to a DoS vector due to excessive memory allocation.

Patches

The issue was patched in lnd v0.17.0. Users should update to a version >= v0.17.0 to be protected.

References

Detailed blog post: https://morehouse.github.io/lightning/lnd-onion-bomb/

Developer discussion: https://delvingbitcoin.org/t/dos-disclosure-lnd-onion-bomb/979