CVE-2020-26896
Description
Prior to 0.11.0-beta, LND (Lightning Network Daemon) had a vulnerability in its invoice database. While claiming on-chain a received HTLC output, it didn't verify that the corresponding outgoing off-chain HTLC was already settled before releasing the preimage. In the case of a hash-and-amount collision with an invoice, the preimage for an expected payment was instead released. A malicious peer could have deliberately intercepted an HTLC intended for the victim node, probed the preimage through a colluding relayed HTLC, and stolen the intercepted HTLC. The impact is a loss of funds in certain situations, and a weakening of the victim's receiver privacy.
How to fix
- lightning_network_daemon_project lightning_network_daemon0.11.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| lightning_network_daemon_project lightning_network_daemon | v < 0.11.0, 0.11.0 | 0.11.0 |
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