# CVE-2020-8252: Node.js 14 and 1 other: Classic Buffer Overflow (CWE-120)

CVE-2020-8252 is fixed in 10 products on 2 platforms, first by Node.js 14 14.9.0, released August 27, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-8252
- Priority: High
- CVSS: 7.8 (Moderate)
- EPSS: 0.0071
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 18, 2020
- Weakness: CWE-120: Classic Buffer Overflow (CWE-120)
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2020-8252

## Description

The implementation of realpath in libuv < 10.22.1, < 12.18.4, and < 14.9.0 used within Node.js incorrectly determined the buffer size which can result in a buffer overflow if the resolved path is longer than 256 bytes.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Node.js 10 | 10.23.2 | [Node.js 10 10.23.2](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.10-10.23.2.md) | Jan 26, 2021 |
| Windows apps | Node.js 14 | 14.9.0 | [Node.js 14 14.9.0](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.14-14.9.0.md) | Aug 27, 2020 |
| Linux | libuv1 Ubuntu 20.04 LTS (focal) | 1.34.2-1ubuntu1.1 | [libuv1 1.34.2-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libuv1-1.34.2-1ubuntu1.1.md) | Sep 18, 2020 |
| Linux | nodejs RHEL 8 | 1:10.23.1-1.module+el8.3.0+9502+012d8a97 | [RHSA-2021:0548](https://patchblox.com/security/data/fix/linux/rhsa-2021-0548.md) | Feb 16, 2021 |
| Linux | nodejs ol 8 | 1:12.18.4-2.module+el8.2.0+7806+0b44ae23 | [ELSA-2020-4272](https://patchblox.com/security/data/fix/linux/elsa-2020-4272.md) | Oct 20, 2020 |
| Linux | nodejs-devel RHEL 8 | 1:10.23.1-1.module+el8.3.0+9502+012d8a97 | [RHSA-2021:0548](https://patchblox.com/security/data/fix/linux/rhsa-2021-0548.md) | Feb 16, 2021 |
| Linux | nodejs-devel ol 8 | 1:12.18.4-2.module+el8.2.0+7806+0b44ae23 | [ELSA-2020-4272](https://patchblox.com/security/data/fix/linux/elsa-2020-4272.md) | Oct 20, 2020 |
| Linux | nodejs-docs RHEL 8 | 1:10.23.1-1.module+el8.3.0+9502+012d8a97 | [RHSA-2021:0548](https://patchblox.com/security/data/fix/linux/rhsa-2021-0548.md) | Feb 16, 2021 |
| Linux | nodejs-docs ol 8 | 1:12.18.4-2.module+el8.2.0+7806+0b44ae23 | [ELSA-2020-4272](https://patchblox.com/security/data/fix/linux/elsa-2020-4272.md) | Oct 20, 2020 |
| Linux | nodejs-full-i18n RHEL 8 | 1:10.23.1-1.module+el8.3.0+9502+012d8a97 | [RHSA-2021:0548](https://patchblox.com/security/data/fix/linux/rhsa-2021-0548.md) | Feb 16, 2021 |
| Linux | nodejs-full-i18n ol 8 | 1:12.18.4-2.module+el8.2.0+7806+0b44ae23 | [ELSA-2020-4272](https://patchblox.com/security/data/fix/linux/elsa-2020-4272.md) | Oct 20, 2020 |
| Linux | nodejs-nodemon RHEL 8 | 0:1.18.3-1.module+el8+2632+6c5111ed | [RHSA-2021:0548](https://patchblox.com/security/data/fix/linux/rhsa-2021-0548.md) | Feb 16, 2021 |
| Linux | nodejs-nodemon ol 8 | 0:1.18.3-1.module+el8.1.0+5393+aaf413e3 | [ELSA-2020-4272](https://patchblox.com/security/data/fix/linux/elsa-2020-4272.md) | Oct 20, 2020 |
| Linux | nodejs-packaging RHEL 8 | 0:17-3.module+el8+2873+aa7dfd9a | [RHSA-2021:0548](https://patchblox.com/security/data/fix/linux/rhsa-2021-0548.md) | Feb 16, 2021 |
| Linux | nodejs-packaging ol 8 | 0:17-3.module+el8.1.0+5393+aaf413e3 | [ELSA-2020-4272](https://patchblox.com/security/data/fix/linux/elsa-2020-4272.md) | Oct 20, 2020 |
| Linux | npm RHEL 8 | 1:6.14.10-1.10.23.1.1.module+el8.3.0+9502+012d8a97 | [RHSA-2021:0548](https://patchblox.com/security/data/fix/linux/rhsa-2021-0548.md) | Feb 16, 2021 |
| Linux | npm ol 8 | 1:6.14.6-1.12.18.4.2.module+el8.2.0+7806+0b44ae23 | [ELSA-2020-4272](https://patchblox.com/security/data/fix/linux/elsa-2020-4272.md) | Oct 20, 2020 |

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