---
title: "CVE-2016-7444\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-2016-7444?format=md
keywords: index, follow
---

# CVE-2016-7444

Publication date 27 September 2016

Last updated 25 August 2025

---

Ubuntu priority

**Low**

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

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2016-7444?format=md#impact-score)

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## Description

The gnutls\_ocsp\_resp\_check\_crt function in lib/x509/ocsp.c in GnuTLS before
3.4.15 and 3.5.x before 3.5.4 does not verify the serial length of an OCSP
response, which might allow remote attackers to bypass an intended
certificate validation mechanism via vectors involving trailing bytes left
by gnutls\_malloc.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| gnutls26 | 19.04 disco | Not in release |
| 18.10 cosmic | Not in release |
| 18.04 LTS bionic | Not in release |
| 17.10 artful | Not in release |
| 17.04 zesty | Not in release |
| 16.10 yakkety | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not affected |
| 12.04 LTS precise | Not affected |
| gnutls28 | 19.04 disco | Not affected |
| 18.10 cosmic | Not affected |
| 18.04 LTS bionic | Not affected |
| 17.10 artful | Not affected |
| 17.04 zesty | Not affected |
| 16.10 yakkety | Not affected |
| 16.04 LTS xenial | Fixed 3.4.10-4ubuntu1.2 |
| 14.04 LTS trusty | Not in release |
| 12.04 LTS precise | Not affected |

---

* [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-2016-7444?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 |
| --- | --- |
| gnutls28 | * Upstream:   [964632f](https://gitlab.com/gnutls/gnutls/commit/964632f37dfdfb914ebc5e49db4fa29af35b1de9) * Upstream:   [c089e01](https://gitlab.com/gnutls/gnutls/commit/c089e019ef83a77b2fdca24d0875ef25f6b38f1a) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.5 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | None |
  | Integrity impact | High |
  | Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7444)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2016-7444)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2016-7444)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2016-7444)

### Related Ubuntu Security Notices (USN)

+ [USN-3183-1](https://usn.ubuntu.com/USN-3183-1)
+ GnuTLS vulnerabilities
+ 1 February 2017

### Other references

* <https://gnutls.org/security.html#GNUTLS-SA-2016-3>
* <http://lists.gnutls.org/pipermail/gnutls-devel/2016-September/008146.html>
* <http://www.openwall.com/lists/oss-security/2016/09/18/3>
* <https://www.cve.org/CVERecord?id=CVE-2016-7444>