# CVE-2017-3731: Truncated packet could crash via OOB read

CVE-2017-3731 is fixed in Node.js 4 on 1 platform by Node.js 4 4.7.3 (version 4.7.3), released January 31, 2017. 1 other affected product has no fix yet. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2017-3731
- Priority: High
- CVSS: 7.5
- EPSS: 0.5732
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 4, 2017
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2017-3731

## Description

If an SSL/TLS server or client is running on a 32-bit host, and a specific cipher is being used, then a truncated packet can cause that server or client to perform an out-of-bounds read, usually resulting in a crash. For OpenSSL 1.1.0, the crash can be triggered when using CHACHA20/POLY1305; users should upgrade to 1.1.0d. For Openssl 1.0.2, the crash can be triggered when using RC4-MD5; users who have not disabled that algorithm should update to 1.0.2k.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Node.js 4 | 4.7.3 | [Node.js 4 4.7.3](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.4-4.7.3.md) | Jan 31, 2017 |

## No fix yet

| Platform | Product | Status |
|---|---|---|
| Windows apps | Node.js 7 | no-fix |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo