# CVE-2016-2183: Weak cryptography in n/a

> Remote attackers can recover cleartext data from long-duration TLS, SSH, or IPSec sessions using DES or Triple DES ciphers via the Sweet32 birthday attack.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 Sep 2016
- **Updated:** 29 May 2026
- **Also known as:** ALPINE-CVE-2016-2183, GHSA-w2rw-pv8p-h9c8, PSF-2016-4, RHSA-2017:0462, RHSA-2018:2123, SUSE-SU-2017:0716-1, SUSE-SU-2017:0719-1, SUSE-SU-2017:0720-1, SUSE-SU-2017:0726-1, SUSE-SU-2017:0839-1, UBUNTU-CVE-2016-2183

## What is CVE-2016-2183?

CVE-2016-2183 is a high-severity vulnerability in Nodejs Node.js, published on 1 Sep 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The DES and Triple DES ciphers, as used in the TLS, SSH, and IPSec protocols and other protocols and products, have a birthday bound of approximately four billion blocks, which makes it easier for remote attackers to obtain cleartext data via a birthday attack against a long-duration encrypted session, as demonstrated by an HTTPS session using Triple DES in CBC mode, aka a "Sweet32" attack.

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

## Which versions are affected by CVE-2016-2183?

It affects 9 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `python` | Red Hat:enterprise_linux:7::client | All versions | 0:2.7.5-69.el7_5 |
| `python-debug` | Red Hat:enterprise_linux:7::client | All versions | 0:2.7.5-69.el7_5 |
| `python-debuginfo` | Red Hat:enterprise_linux:7::client | All versions | 0:2.7.5-69.el7_5 |
| `python-devel` | Red Hat:enterprise_linux:7::client | All versions | 0:2.7.5-69.el7_5 |
| `python-libs` | Red Hat:enterprise_linux:7::client | All versions | 0:2.7.5-69.el7_5 |
| `python-test` | Red Hat:enterprise_linux:7::client | All versions | 0:2.7.5-69.el7_5 |
| `python-tools` | Red Hat:enterprise_linux:7::client | All versions | 0:2.7.5-69.el7_5 |
| `tkinter` | Red Hat:enterprise_linux:7::client | All versions | 0:2.7.5-69.el7_5 |
| `python` | Red Hat:enterprise_linux:7::computenode | All versions | 0:2.7.5-69.el7_5 |
| `python-debug` | Red Hat:enterprise_linux:7::computenode | All versions | 0:2.7.5-69.el7_5 |
| `python-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 0:2.7.5-69.el7_5 |
| `python-devel` | Red Hat:enterprise_linux:7::computenode | All versions | 0:2.7.5-69.el7_5 |
| `python-libs` | Red Hat:enterprise_linux:7::computenode | All versions | 0:2.7.5-69.el7_5 |
| `python-test` | Red Hat:enterprise_linux:7::computenode | All versions | 0:2.7.5-69.el7_5 |
| `python-tools` | Red Hat:enterprise_linux:7::computenode | All versions | 0:2.7.5-69.el7_5 |
| `tkinter` | Red Hat:enterprise_linux:7::computenode | All versions | 0:2.7.5-69.el7_5 |
| `python` | Red Hat:enterprise_linux:7::server | All versions | 0:2.7.5-69.el7_5 |
| `python-debug` | Red Hat:enterprise_linux:7::server | All versions | 0:2.7.5-69.el7_5 |
| `python-debuginfo` | Red Hat:enterprise_linux:7::server | All versions | 0:2.7.5-69.el7_5 |
| `python-devel` | Red Hat:enterprise_linux:7::server | All versions | 0:2.7.5-69.el7_5 |
| `python-libs` | Red Hat:enterprise_linux:7::server | All versions | 0:2.7.5-69.el7_5 |
| `python-test` | Red Hat:enterprise_linux:7::server | All versions | 0:2.7.5-69.el7_5 |
| `python-tools` | Red Hat:enterprise_linux:7::server | All versions | 0:2.7.5-69.el7_5 |
| `tkinter` | Red Hat:enterprise_linux:7::server | All versions | 0:2.7.5-69.el7_5 |
| `python` | Red Hat:enterprise_linux:7::workstation | All versions | 0:2.7.5-69.el7_5 |
| `python-debug` | Red Hat:enterprise_linux:7::workstation | All versions | 0:2.7.5-69.el7_5 |
| `python-debuginfo` | Red Hat:enterprise_linux:7::workstation | All versions | 0:2.7.5-69.el7_5 |
| `python-devel` | Red Hat:enterprise_linux:7::workstation | All versions | 0:2.7.5-69.el7_5 |
| `python-libs` | Red Hat:enterprise_linux:7::workstation | All versions | 0:2.7.5-69.el7_5 |
| `python-test` | Red Hat:enterprise_linux:7::workstation | All versions | 0:2.7.5-69.el7_5 |
| `python-tools` | Red Hat:enterprise_linux:7::workstation | All versions | 0:2.7.5-69.el7_5 |
| `tkinter` | Red Hat:enterprise_linux:7::workstation | All versions | 0:2.7.5-69.el7_5 |
| `java-1.8.0-ibm` | Red Hat:rhel_extras:6 | All versions | 1:1.8.0.4.1-1jpp.1.el6_8 |
| `java-1.8.0-ibm-demo` | Red Hat:rhel_extras:6 | All versions | 1:1.8.0.4.1-1jpp.1.el6_8 |
| `java-1.8.0-ibm-devel` | Red Hat:rhel_extras:6 | All versions | 1:1.8.0.4.1-1jpp.1.el6_8 |
| `java-1.8.0-ibm-jdbc` | Red Hat:rhel_extras:6 | All versions | 1:1.8.0.4.1-1jpp.1.el6_8 |
| `java-1.8.0-ibm-plugin` | Red Hat:rhel_extras:6 | All versions | 1:1.8.0.4.1-1jpp.1.el6_8 |
| `java-1.8.0-ibm-src` | Red Hat:rhel_extras:6 | All versions | 1:1.8.0.4.1-1jpp.1.el6_8 |
| `java-1.8.0-ibm` | Red Hat:rhel_extras:7 | All versions | 1:1.8.0.4.1-1jpp.2.el7 |
| `java-1.8.0-ibm-demo` | Red Hat:rhel_extras:7 | All versions | 1:1.8.0.4.1-1jpp.2.el7 |

Products: Cisco Content Security Management Appliance, Nodejs Node.js, Openssl Openssl, Oracle Database, Python Python, Redhat Enterprise Linux, Redhat Jboss Enterprise Application Platform, Redhat Jboss Enterprise Web Server, Redhat Jboss Web Server.

## How do I fix CVE-2016-2183?

Apply the vendor's patch.

## Is CVE-2016-2183 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-2183 exists.

Public exploit code:

- Simplified Version of Cryptography Attack based on Birthday Paradox: Sweet32 (CVE-2016-2183) (github_poc): https://github.com/ZakyHermawan/Simple-Sweet32

## Other vulnerabilities in Nodejs Node.js

- [CVE-2014-2119](https://insights.sbomify.com/CVE-2014-2119/): File upload in n/a (high 8.5)
- [CVE-2015-6321](https://insights.sbomify.com/CVE-2015-6321/): Denial of service in n/a (high 7.8)
- [CVE-2013-5537](https://insights.sbomify.com/CVE-2013-5537/): Denial of service in n/a (high 7.8)
- [CVE-2013-3395](https://insights.sbomify.com/CVE-2013-3395/): Cross-site request forgery in n/a (medium 6.8)
- [CVE-2021-1447](https://insights.sbomify.com/CVE-2021-1447/): Cisco Content Security Management Appliance Privilege Escalation Vulnerability (medium 6.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-2183 and fix it if it is affected.

What it is: CVE-2016-2183 is a high-severity vulnerability in Nodejs Node.js, published on 1 Sep 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-2183 exists.

Affected product: Nodejs Node.js. 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-2016-2183/ (Markdown: https://insights.sbomify.com/CVE-2016-2183/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-2183
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-2183
- OSV: https://osv.dev/vulnerability/CVE-2016-2183

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-2183/
Summaries are generated and may contain mistakes; the official description above is the record.