Executive Summary

Informations
Name CVE-2020-26896 First vendor Publication 2020-10-21
Vendor Cve Last vendor Modification 2024-11-21

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Overall CVSS Score 8.2
Base Score 8.2 Environmental Score 8.2
impact SubScore 4.2 Temporal Score 8.2
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact Low
Integrity Impact High Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:P/I:P/A:N)
Cvss Base Score 5.8 Attack Range Network
Cvss Impact Score 4.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26896

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-354 Improper Validation of Integrity Check Value

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 60

Sources (Detail)

https://gist.github.com/ariard/6bdeb995565d1cc292753e1ee4ae402d
https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002855...
https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002857...
Source Url

Alert History

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Date Informations
2024-11-28 13:42:52
  • Multiple Updates
2021-05-05 01:39:00
  • Multiple Updates
2021-05-04 13:50:19
  • Multiple Updates
2021-04-22 03:01:55
  • Multiple Updates
2020-11-05 21:23:25
  • Multiple Updates
2020-11-01 17:22:59
  • Multiple Updates
2020-10-22 01:30:35
  • Multiple Updates
2020-10-22 01:28:43
  • Multiple Updates
2020-10-21 17:23:05
  • Multiple Updates
2020-10-21 09:23:01
  • First insertion