# CVE-2014-3591: Information disclosure in GnuPG

> Physically proximate attackers can extract private keys from GnuPG or Libgcrypt by analyzing electromagnetic fluctuations during Elgamal decryption.

- **Severity:** Medium 4.2 (`CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 29 Nov 2019
- **Updated:** 6 Aug 2024
- **Also known as:** AZL-41815, CVE-2015-3591, DEBIAN-CVE-2014-3591, GHSA-5p8v-2xvp-pwmc, SUSE-SU-2015:1179-1, UBUNTU-CVE-2014-3591

## What is CVE-2014-3591?

CVE-2014-3591 is a medium-severity vulnerability in Debian Debian Linux, published on 29 Nov 2019. It can only be exploited from the same machine or local network, with no action from the victim.

### Official 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.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2014-3591?

It affects 3 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `libgcrypt` | SUSE:Linux Enterprise Desktop 12 | All versions | 1.6.1-13.1 |
| `libgcrypt` | SUSE:Linux Enterprise Server 12 | All versions | 1.6.1-13.1 |
| `libgcrypt` | SUSE:Linux Enterprise Server for SAP Applications 12 | All versions | 1.6.1-13.1 |
| `libgcrypt` | SUSE:Linux Enterprise Software Development Kit 12 | All versions | 1.6.1-13.1 |

Products: Debian Debian Linux, Gnupg Gnupg, Gnupg Libgcrypt.

## How do I fix CVE-2014-3591?

Upgrade to a fixed version.

## Is CVE-2014-3591 being exploited?

There is no known exploitation of CVE-2014-3591 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2014-3591 and fix it if it is affected.

What it is: CVE-2014-3591 is a medium-severity vulnerability in Debian Debian Linux, published on 29 Nov 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2014-3591 in the wild and no public exploit code.

Affected product: Debian Debian Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2014-3591/ (Markdown: https://insights.sbomify.com/CVE-2014-3591/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2014-3591
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2014-3591
- OSV: https://osv.dev/vulnerability/CVE-2014-3591

---
From sbomify Insights: https://insights.sbomify.com/CVE-2014-3591/
Summaries are generated and may contain mistakes; the official description above is the record.