CVE-2019-25220

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.34%
Vendor Advisory bitcoincore.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures third party advisory
https://bitcoincore.org/en/2024/09/18/disclose-headers-oom vendor advisory
https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2019-October/017354.html mailing list

Frequently Asked Questions

What is the severity of CVE-2019-25220?
CVE-2019-25220 has been scored as a high severity vulnerability.
How to fix CVE-2019-25220?
To fix CVE-2019-25220, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-25220 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-25220 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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