CVE-2022-39389

Public Exploit
Witness Block Parsing DoS Vulnerability in lnd

Description

Lightning Network Daemon (lnd) is an implementation of a lightning bitcoin overlay network node. 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. A patch is available in `lnd` version 0.15.4. Users are advised to upgrade. Users unable to upgrade may 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.

Category

8.2
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.08%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: lightningnetwork lnd
Published at:
Updated at:

References

Link Tags
https://github.com/lightningnetwork/lnd/security/advisories/GHSA-hc82-w9v8-83pr third party advisory
https://github.com/lightningnetwork/lnd/issues/7096 patch exploit third party advisory issue tracking
https://github.com/lightningnetwork/lnd/pull/7098 third party advisory patch
https://github.com/lightningnetwork/lnd/releases/tag/v0.15.4-beta third party advisory release notes

Frequently Asked Questions

What is the severity of CVE-2022-39389?
CVE-2022-39389 has been scored as a high severity vulnerability.
How to fix CVE-2022-39389?
To fix CVE-2022-39389, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-39389 being actively exploited in the wild?
It is possible that CVE-2022-39389 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-39389?
CVE-2022-39389 affects lightningnetwork lnd.
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