high8.2

CVE-2022-39389

Witness Block Parsing DoS Vulnerability

Impact

### 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 packages

Ecosystem	Package	Affected	Fixed in
go	`github.com/lightningnetwork/lnd`	< 0.15.4-beta	0.15.4-beta

Affected products

Vendor	Product	Affected versions
Btcd Project	Btcd	before 0.23.3
Lightning Network Daemon Project	Lightning Network Daemon	before 0.15.4

Weakness classification

CWE-20