CVE-2022-39389
Witness Block Parsing DoS Vulnerability
Description
### 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
How to fix CVE-2022-39389
To remediate CVE-2022-39389, upgrade the affected package to a fixed version below.
- —upgrade to 0.15.4-beta or later
Is CVE-2022-39389 being exploited?
Low — EPSS is 0.6%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 0.15.4-beta
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H |