---
title: "CVE-2014-3591\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-2014-3591?format=md
keywords: index, follow
---

# CVE-2014-3591

Publication date 31 December 2014

Last updated 25 August 2025

---

Ubuntu priority

**Low**

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

## Cvss 3 Severity Score

**4.2 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2014-3591?format=md#impact-score)

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## Description

Libgcrypt before 1.6.3 and GnuPG before 1.4.19 does not implement
ciphertext blinding for Elgamal decryption, which allows physically
proximate attackers to obtain the server's private key by determining
factors using crafted ciphertext and the fluctuations in the
electromagnetic field during multiplication.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| gnupg | 14.10 utopic | Fixed 1.4.16-1.2ubuntu1.2 |
| 14.04 LTS trusty | Fixed 1.4.16-1ubuntu2.3 |
| 12.04 LTS precise | Fixed 1.4.11-3ubuntu2.9 |
| 10.04 LTS lucid | Fixed 1.4.10-2ubuntu1.8 |
| libgcrypt11 | 14.10 utopic | Fixed 1.5.4-2ubuntu1.1 |
| 14.04 LTS trusty | Fixed 1.5.3-2ubuntu4.2 |
| 12.04 LTS precise | Fixed 1.5.0-3ubuntu0.4 |
| 10.04 LTS lucid | Fixed 1.4.4-5ubuntu2.4 |
| libgcrypt20 | 14.10 utopic | Fixed 1.6.1-2ubuntu1.14.10.1 |
| 14.04 LTS trusty | Fixed 1.6.1-2ubuntu1.14.04.1 |
| 12.04 LTS precise | Not in release |
| 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-2014-3591?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 |
| --- | --- |
| gnupg | * Upstream:   <http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=ff53cf06e966dce0daba5f2c84e03ab9db2c3c8b> |
| libgcrypt11 | * Upstream:   <http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=35cd81f134c0da4e7e6fcfe40d270ee1251f52c2> |
| libgcrypt20 | * Upstream:   <http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=d482948ac41768c36c5352a513fca8c50d2da4db> |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

4.2 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 4.2 · Medium |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3591)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2014-3591)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2014-3591)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2014-3591)

### Related Ubuntu Security Notices (USN)

+ [USN-2555-1](https://usn.ubuntu.com/USN-2555-1)
+ Libgcrypt vulnerabilities
+ 1 April 2015

+ [USN-2554-1](https://usn.ubuntu.com/USN-2554-1)
+ GnuPG vulnerabilities
+ 1 April 2015

### Other references

* <http://www.cs.tau.ac.il/~tromer/radioexp/>
* <https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000363.html>
* <https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000364.html>
* <https://www.cve.org/CVERecord?id=CVE-2014-3591>