CVE-2020-26896
CVSS V2 Medium 5.8
CVSS V3 High 8.2
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.
Overview
- CVE ID
- CVE-2020-26896
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2020-10-21T02:15:12
- Last Modified Date
- 2020-11-05T15:43:36
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:*:*:*:*:*:*:*:* | 1 | OR | 0.11.0 | |
| cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.11.0:-:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.11.0:beta_rc1:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.11.0:beta_rc2:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.11.0:beta_rc3:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.11.0:beta_rc4:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:P/I:P/A:N
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- Base Score
- 5.8
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 4.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- LOW
- Availability Impact
- NONE
- Base Score
- 8.2
- Base Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 4.2
References
| Reference URL | Reference Tags |
|---|---|
| https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002857.html | Mailing List Patch Third Party Advisory |
| https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002855.html | Mailing List Third Party Advisory |
| https://gist.github.com/ariard/6bdeb995565d1cc292753e1ee4ae402d | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-26896 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26896 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 16:20:59 | Added to TrackCVE | |||
| 2022-12-05 00:33:30 | 2020-10-21T02:15Z | 2020-10-21T02:15:12 | CVE Published Date | updated |
| 2022-12-05 00:33:30 | 2020-11-05T15:43:36 | CVE Modified Date | updated | |
| 2022-12-05 00:33:30 | Analyzed | Vulnerability Status | updated |