CVE-2020-26896
Prior to 0.11.0-beta, LND (Lightning Network Daemon) had a vulnerability in its invoice database.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.74%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.2 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
- EPSS
- 0.74% probability · 53th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-354
- Affected
- lightning network daemon project/lightning network daemon
- Source
- cve@mitre.org
References
- https://gist.github.com/ariard/6bdeb995565d1cc292753e1ee4ae402dThird Party Advisory
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002855.htmlMailing List, Third Party Advisory
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002857.htmlMailing List, Patch, Third Party Advisory
- https://gist.github.com/ariard/6bdeb995565d1cc292753e1ee4ae402dThird Party Advisory
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002855.htmlMailing List, Third Party Advisory
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002857.htmlMailing List, Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.