CVE-2019-25220
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Bitcoin Core
PublishedNov 18, 2024
First seenNov 18, 2024
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- bitcoin bitcoin_core24.0.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| bitcoin bitcoin_core | v < 24.0.1 | 24.0.1 |
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