Lightning Network Daemon Onion Bomb

Vulnerability Description

The Lightning Network Daemon (lnd) - is a complete implementation of a Lightning Network node. A parsing vulnerability in lnd's onion processing logic and lead to a DoS vector due to excessive memory allocation. The issue was patched in lnd v0.17.0. Users should update to a version > v0.17.0 to be protected. Users unable to upgrade may set the `--rejecthtlc` CLI flag and also disable forwarding on channels via the `UpdateChanPolicyCommand`, or disable listening on a public network interface via the `--nolisten` flag as a mitigation.

References

• https://github.com/lightningnetwork/lnd/security/advisories/GHSA-9gxx-58q6-42p7
• https://delvingbitcoin.org/t/dos-disclosure-lnd-onion-bomb/979
• https://github.com/lightningnetwork/lnd/releases/tag/v0.17.0-beta
• https://lightning.network
• https://morehouse.github.io/lightning/lnd-onion-bomb