CVE-2020-26895 Information

Description

Prior to 0.10.0-beta LND (Lightning Network Daemon) would have accepted a counterparty high-S signature and broadcast tx-relay invalid local commitment/HTLC transactions. This can be exploited by any peer with an open channel regardless of the victim situation (e.g. routing node payment-receiver or payment-sender). The impact is a loss of funds in certain situations.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Reference

https://gist.github.com/ariard/fb432a9d2cd3ba24fdc18ccc8c5c6eb4 https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002856.html https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002858.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

5.3