CVE-2019-25220

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
mitreCNA
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CISA-ADPADP
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 56%
VendorProductVersion
bitcoinbitcoin_core
𝑥
< 24.0.1
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://bitcoincore.org/en/2024/09/18/disclose-headers-oom
https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures
https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2019-October/017354.html