GitHub Advisory DatabaseGHSA-HC82-W9V8-83PRWitness Block Parsing DoS Vulnerability
8.2 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
0.001 Low
EPSS
Percentile
40.3%
Impact
All lnd nodes before version v0.15.4 are vulnerable to a block parsing bug that can cause a node to enter a degraded state once encountered. In this degraded state, nodes can continue to make payments and forward HTLCs, and close out channels. Opening channels is prohibited, and also on chain transaction events will be undetected.
This can cause loss of funds if a CSV expiry is researched during a breach attempt or a CLTV delta expires forgetting the funds in the HTLC.
Patches
A patch is available starting with lnd v0.15.4.
Workarounds
Nodes can use the lncli updatechanpolicy RPC call to increase their CLTV value to a very high amount or increase their fee policies. This will prevent nodes from routing through your node, meaning that no pending HTLCs can be present.
References
https://github.com/lightningnetwork/lnd/issues/7096
https://github.com/lightningnetwork/lnd/releases/tag/v0.15.4-beta
Affected configurations
| CPE | Name | Operator | Version |
|---|---|---|---|
| github.com/lightningnetwork/lnd | lt | 0.15.4-beta |
References
Related
8.2 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
0.001 Low
EPSS
Percentile
40.3%