# CVE-2018-5407: Simultaneous Multi-threading (SMT) in processors can enable local users to exploit software vulnerable to timing attacks via a side-channel timing attack on 'port contention'.

CVE-2018-5407 is fixed in 5 products on 2 platforms, first by libssl1.0.0 1.0.2n-1ubuntu5.2, released November 14, 2018. 2 other affected products have no fix yet. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-5407
- Priority: Routine
- CVSS: 4.7 (Moderate)
- EPSS: 0.0342
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 14, 2018
- Weakness: Exposure of Sensitive Information to an Unauthorized Actor
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-5407

## Description

Simultaneous Multi-threading (SMT) in processors can enable local users to exploit software vulnerable to timing attacks via a side-channel timing attack on 'port contention'.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Node.js 6 | 6.17.0 | [Node.js 6 6.17.0](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.6-6.17.0.md) | Feb 28, 2019 |
| Linux | libssl1.0.0 Ubuntu 18.04.6 LTS (bionic) | 1.0.2n-1ubuntu5.2 | [libssl1.0.0 1.0.2n-1ubuntu5.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libssl1.0.0-1.0.2n-1ubuntu5.2.md) | Nov 14, 2018 |
| Linux | libssl1.1 Ubuntu 18.04.6 LTS (bionic) | 1.1.0g-2ubuntu4.3 | [libssl1.1 1.1.0g-2ubuntu4.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libssl1.1-1.1.0g-2ubuntu4.3.md) | Nov 14, 2018 |
| Linux | openssl Ubuntu 18.04.6 LTS (bionic) | 1.1.0g-2ubuntu4.3 | [openssl 1.1.0g-2ubuntu4.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-openssl-1.1.0g-2ubuntu4.3.md) | Nov 14, 2018 |
| Linux | openssl1.0 Ubuntu 18.04.6 LTS (bionic) | 1.0.2n-1ubuntu5.2 | [openssl1.0 1.0.2n-1ubuntu5.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-openssl1.0-1.0.2n-1ubuntu5.2.md) | Nov 14, 2018 |

## No fix yet

| Platform | Product | Status |
|---|---|---|
| Windows apps | Node.js 4 | no-fix |
| Windows apps | Node.js 8 | 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo