CVE-2019-25220
moderate-risk
Published 2024-11-18
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.
Do I need to act?
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0.54% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10
High
NETWORK
/ LOW complexity
Affected Products (1)
Affected Vendors
References (3)
Vendor Advisory
https://bitcoincore.org/en/2024/09/18/disclose-headers-oom
Third Party Advisory
https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures
33
/ 100
moderate-risk
Severity
26/34 · High
Exploitability
2/34 · Minimal
Exposure
5/34 · Minimal