# CVE-2015-3193: Node.js 4: The Montgomery squaring implementation in crypto/bn/asm/x86_64-mont5.pl in OpenSSL 1.0.2 before 1.0.2e…

CVE-2015-3193 is fixed in Node.js 4 on 1 platform by Node.js 4 4.2.3 (version 4.2.3), released December 3, 2015. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2015-3193
- Priority: High
- CVSS: 7.5
- EPSS: 0.2514
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 6, 2015
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2015-3193

## Description

The Montgomery squaring implementation in crypto/bn/asm/x86_64-mont5.pl in OpenSSL 1.0.2 before 1.0.2e on the x86_64 platform, as used by the BN_mod_exp function, mishandles carry propagation and produces incorrect output, which makes it easier for remote attackers to obtain sensitive private-key information via an attack against use of a (1) Diffie-Hellman (DH) or (2) Diffie-Hellman Ephemeral (DHE) ciphersuite.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Node.js 4 | 4.2.3 | [Node.js 4 4.2.3](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.4-4.2.3.md) | Dec 3, 2015 |

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