---
title: "CVE-2014-3511\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2014-3511?format=md
keywords: index, follow
---

# CVE-2014-3511

Publication date 7 August 2014

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

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## Description

The ssl23\_get\_client\_hello function in s23\_srvr.c in OpenSSL 1.0.1 before
1.0.1i allows man-in-the-middle attackers to force the use of TLS 1.0 by
triggering ClientHello message fragmentation in communication between a
client and server that both support later TLS versions, related to a
"protocol downgrade" issue.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| openssl | 14.04 LTS trusty | Fixed 1.0.1f-1ubuntu2.5 |
| 12.04 LTS precise | Fixed 1.0.1-4ubuntu5.17 |
| 10.04 LTS lucid | Not affected |
| openssl098 | 14.04 LTS trusty | Not in release |
| 12.04 LTS precise | Not affected |
| 10.04 LTS lucid | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2014-3511?format=md#patch-details)

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| openssl | * Upstream:   <https://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=fc4f4cdb8bf9981904e652abf69b892a45bddacf> * Upstream:   <https://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=fc4bd2f287582c5f51f9549727fd5a49e9fc3012> |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3511)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2014-3511)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2014-3511)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2014-3511)

### Related Ubuntu Security Notices (USN)

+ [USN-2308-1](https://usn.ubuntu.com/USN-2308-1)
+ OpenSSL vulnerabilities
+ 7 August 2014

### Other references

* <https://www.openssl.org/news/secadv_20140806.txt>
* <https://www.cve.org/CVERecord?id=CVE-2014-3511>