---
title: "CVE-2016-0701\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-2016-0701?format=md
keywords: index, follow
---

# CVE-2016-0701

Publication date 28 January 2016

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**3.7 · Low**

[Score breakdown](https://ubuntu.com/security/CVE-2016-0701?format=md#impact-score)

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## Description

The DH\_check\_pub\_key function in crypto/dh/dh\_check.c in OpenSSL 1.0.2
before 1.0.2f does not ensure that prime numbers are appropriate for
Diffie-Hellman (DH) key exchange, which makes it easier for remote
attackers to discover a private DH exponent by making multiple handshakes
with a peer that chose an inappropriate number, as demonstrated by a number
in an X9.42 file.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2016-0701?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| openssl | 15.10 wily | Fixed 1.0.2d-0ubuntu1.3 |
| 15.04 vivid | Not affected |
| 14.04 LTS trusty | Not affected |
| 12.04 LTS precise | Not affected |
| openssl098 | 15.10 wily | Not in release |
| 15.04 vivid | Not affected |
| 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-2016-0701?format=md#patch-details)

## Notes

---

### [mdeslaur](https://launchpad.net/~mdeslaur)

1.0.2 only

### 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/?p=openssl.git;a=commit;h=878e2c5b13010329c203f309ed0c8f2113f85648> * Upstream:   <https://git.openssl.org/?p=openssl.git;a=commit;h=c5b831f21d0d29d1e517d139d9d101763f60c9a2> * Upstream:   <https://git.openssl.org/?p=openssl.git;a=commit;h=75374adf8a6ff69d6718952121875a491ed2cd29> |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

3.7 · Low

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 3.7 · Low |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0701)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2016-0701)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2016-0701)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2016-0701)

### Related Ubuntu Security Notices (USN)

+ [USN-2883-1](https://usn.ubuntu.com/USN-2883-1)
+ OpenSSL vulnerability
+ 28 January 2016

### Other references

* <https://www.openssl.org/news/secadv/20160128.txt>
* <https://www.cve.org/CVERecord?id=CVE-2016-0701>