Vulnerability Description
Prior to 0.11.0-beta, LND (Lightning Network Daemon) had a vulnerability in its invoice database. While claiming on-chain a received HTLC output, it didn't verify that the corresponding outgoing off-chain HTLC was already settled before releasing the preimage. In the case of a hash-and-amount collision with an invoice, the preimage for an expected payment was instead released. A malicious peer could have deliberately intercepted an HTLC intended for the victim node, probed the preimage through a colluding relayed HTLC, and stolen the intercepted HTLC. The impact is a loss of funds in certain situations, and a weakening of the victim's receiver privacy.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Lightning Network Daemon Project | Lightning Network Daemon | < 0.11.0 |
Related Weaknesses (CWE)
References
- https://gist.github.com/ariard/6bdeb995565d1cc292753e1ee4ae402dThird Party Advisory
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002855.htMailing ListThird Party Advisory
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002857.htMailing ListPatchThird Party Advisory
- https://gist.github.com/ariard/6bdeb995565d1cc292753e1ee4ae402dThird Party Advisory
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002855.htMailing ListThird Party Advisory
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002857.htMailing ListPatchThird Party Advisory
FAQ
What is CVE-2020-26896?
CVE-2020-26896 is a vulnerability with a CVSS score of 8.2 (HIGH). Prior to 0.11.0-beta, LND (Lightning Network Daemon) had a vulnerability in its invoice database. While claiming on-chain a received HTLC output, it didn't verify that the corresponding outgoing off-c...
How severe is CVE-2020-26896?
CVE-2020-26896 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-26896?
Check the references section above for vendor advisories and patch information. Affected products include: Lightning Network Daemon Project Lightning Network Daemon.