CVE-2020-26896
Lightning Network Daemon (LND) HTLC Preimage Release 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.
INFO
Published Date :
Oct. 21, 2020, 2:15 a.m.
Last Modified :
Nov. 5, 2020, 3:43 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.2
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2020-26896 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2020-26896
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-26896.
| URL | Resource |
|---|---|
| https://gist.github.com/ariard/6bdeb995565d1cc292753e1ee4ae402d | Third Party Advisory |
| https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002855.html | Mailing List Third Party Advisory |
| https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002857.html | Mailing List Patch Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
master
C++ HTML M4
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-26896 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-26896 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Reanalysis by [email protected]
Nov. 05, 2020
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:*:*:*:*:*:*:*:* versions up to (excluding) 0.11.0 *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:11.0:-:*:*:*:*:*:* *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:11.0:beta_rc1:*:*:*:*:*:* *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:11.0:beta_rc2:*:*:*:*:*:* *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:11.0:beta_rc3:*:*:*:*:*:* *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:11.0:beta_rc4:*:*:*:*:*:* OR *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:*:*:*:*:*:*:*:* versions up to (excluding) 0.11.0 *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.11.0:-:*:*:*:*:*:* *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.11.0:beta_rc1:*:*:*:*:*:* *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.11.0:beta_rc2:*:*:*:*:*:* *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.11.0:beta_rc3:*:*:*:*:*:* *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.11.0:beta_rc4:*:*:*:*:*:* -
Initial Analysis by [email protected]
Oct. 30, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N Changed Reference Type https://gist.github.com/ariard/6bdeb995565d1cc292753e1ee4ae402d No Types Assigned https://gist.github.com/ariard/6bdeb995565d1cc292753e1ee4ae402d Third Party Advisory Changed Reference Type https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002855.html No Types Assigned https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002855.html Mailing List, Third Party Advisory Changed Reference Type https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002857.html No Types Assigned https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002857.html Mailing List, Patch, Third Party Advisory Added CWE NIST CWE-354 Added CPE Configuration OR *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:*:*:*:*:*:*:*:* versions up to (excluding) 0.11.0 *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:11.0:-:*:*:*:*:*:* *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:11.0:beta_rc1:*:*:*:*:*:* *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:11.0:beta_rc2:*:*:*:*:*:* *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:11.0:beta_rc3:*:*:*:*:*:* *cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:11.0:beta_rc4:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-26896 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-26896
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.10 }} -0.00%
score
0.41982
percentile