CVE-2019-25220

HIGH

Bitcoin Core < 24.0.1 - Denial of Service via Chain Width Expansion Attack

Title source: llm

Description

Bitcoin Core before 24.0.1 allows remote attackers to cause a denial of service (daemon crash) via a flood of low-difficulty header chains (aka a "Chain Width Expansion" attack) because a node does not first verify that a presented chain has enough work before committing to store it.

References (3)

Core 3

Core References

Vendor Advisory

https://bitcoincore.org/en/2024/09/18/disclose-headers-oom

Third Party Advisory

https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures

Mailing List

https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2019-October/017354.html

Scores

CVSS v3 7.5

EPSS 0.0078

EPSS Percentile 51.2%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-770

Status published

Products (1)

bitcoin/bitcoin_core < 24.0.1

Published Nov 18, 2024

Tracked Since Feb 18, 2026