---
title: "CVE-2016-1000346\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-2016-1000346?format=md
keywords: index, follow
---

# CVE-2016-1000346

Publication date 4 June 2018

Last updated 26 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-2016-1000346?format=md#impact-score)

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## Description

In the Bouncy Castle JCE Provider version 1.55 and earlier the other party
DH public key is not fully validated. This can cause issues as invalid keys
can be used to reveal details about the other party's private key where
static Diffie-Hellman is in use. As of release 1.56 the key parameters are
checked on agreement calculation.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| bouncycastle | 26.04 LTS resolute | Not affected |
| 25.10 questing | Not affected |
| 25.04 plucky | Not affected |
| 24.10 oracular | Not affected |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 23.04 lunar | Not affected |
| 22.10 kinetic | Not affected |
| 22.04 LTS jammy | Not affected |
| 21.10 impish | Not affected |
| 21.04 hirsute | Not affected |
| 20.10 groovy | Not affected |
| 20.04 LTS focal | Not affected |
| 19.10 eoan | Not affected |
| 19.04 disco | Not affected |
| 18.10 cosmic | Not affected |
| 18.04 LTS bionic | Not affected |
| 17.10 artful | Not affected |
| 16.04 LTS xenial | Vulnerable |
| 14.04 LTS trusty | Fixed 1.49+dfsg-2ubuntu0.1 |

---

* [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-2016-1000346?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 |
| --- | --- |
| bouncycastle | * Upstream:   [1127131](https://github.com/bcgit/bc-java/commit/1127131c89021612c6eefa26dbe5714c194e7495) |

## 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-2016-1000346)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2016-1000346)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2016-1000346)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2016-1000346)

### Related Ubuntu Security Notices (USN)

+ [USN-3727-1](https://usn.ubuntu.com/USN-3727-1)
+ Bouncy Castle vulnerabilities
+ 1 August 2018

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2016-1000346>