Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Bitcoin | Bitcoin Core | < 24.0.1 |
Related Weaknesses (CWE)
References
- https://bitcoincore.org/en/2024/09/18/disclose-headers-oomVendor Advisory
- https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_ExposuresThird Party Advisory
- https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2019-October/017354.htmlMailing List
FAQ
What is CVE-2019-25220?
CVE-2019-25220 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 no...
How severe is CVE-2019-25220?
CVE-2019-25220 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-25220?
Check the references section above for vendor advisories and patch information. Affected products include: Bitcoin Bitcoin Core.