# CVE-2020-8265: Node.js 14 and 3 others: Use After Free (CWE-416)

CVE-2020-8265 is fixed in 12 products on 2 platforms, first by Node.js 12 12.20.1, released January 4, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-8265
- Priority: High
- CVSS: 8.1 (Moderate)
- EPSS: 0.0912
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 6, 2021
- Weakness: CWE-416: Use After Free (CWE-416)
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2020-8265

## Description

Node.js versions before 10.23.1, 12.20.1, 14.15.4, 15.5.1 are vulnerable to a use-after-free bug in its TLS implementation. When writing to a TLS enabled socket, node::StreamBase::Write calls node::TLSWrap::DoWrite with a freshly allocated WriteWrap object as first argument. If the DoWrite method does not return an error, this object is passed back to the caller as part of a StreamWriteResult structure. This may be exploited to corrupt memory leading to a Denial of Service or potentially other exploits.

## 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 12 | 12.20.1 | [Node.js 12 12.20.1](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.12-12.20.1.md) | Jan 4, 2021 |
| Windows apps | Node.js 14 | 14.15.4 | [Node.js 14 14.15.4](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.14-14.15.4.md) | Jan 4, 2021 |
| Windows apps | Node.js 15 | 15.5.1 | [Node.js 15 15.5.1](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.15-15.5.1.md) | Jan 4, 2021 |
| Linux | libnode64 Ubuntu 20.04 LTS (focal) | 10.19.0~dfsg-3ubuntu1.1 | [libnode64 10.19.0~dfsg-3ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libnode64-10.19.0-dfsg-3ubuntu1.1.md) | Jan 6, 2021 |
| Linux | nodejs RHEL 8 | 1:14.15.4-2.module+el8.3.0+9635+ffdf8381 | [RHSA-2021:0551](https://patchblox.com/security/data/fix/linux/rhsa-2021-0551.md) | Feb 16, 2021 |
| Linux | nodejs Ubuntu 18.04.6 LTS (bionic) | 8.10.0~dfsg-2ubuntu0.4+esm2 | [nodejs 8.10.0~dfsg-2ubuntu0.4+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-nodejs-8.10.0-dfsg-2ubuntu0.4-esm2.md) | Jan 6, 2021 |
| Linux | nodejs Ubuntu 20.04 LTS (focal) | 10.19.0~dfsg-3ubuntu1.1 | [nodejs 10.19.0~dfsg-3ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-nodejs-10.19.0-dfsg-3ubuntu1.1.md) | Jan 6, 2021 |
| Linux | nodejs ol 8 | 1:14.15.4-2.module+el8.3.0+9657+a08a905a | [ELSA-2021-0551](https://patchblox.com/security/data/fix/linux/elsa-2021-0551.md) | Feb 20, 2021 |
| Linux | nodejs-devel RHEL 8 | 1:14.15.4-2.module+el8.3.0+9635+ffdf8381 | [RHSA-2021:0551](https://patchblox.com/security/data/fix/linux/rhsa-2021-0551.md) | Feb 16, 2021 |
| Linux | nodejs-devel ol 8 | 1:14.15.4-2.module+el8.3.0+9657+a08a905a | [ELSA-2021-0551](https://patchblox.com/security/data/fix/linux/elsa-2021-0551.md) | Feb 20, 2021 |
| Linux | nodejs-docs RHEL 8 | 1:14.15.4-2.module+el8.3.0+9635+ffdf8381 | [RHSA-2021:0551](https://patchblox.com/security/data/fix/linux/rhsa-2021-0551.md) | Feb 16, 2021 |
| Linux | nodejs-docs ol 8 | 1:14.15.4-2.module+el8.3.0+9657+a08a905a | [ELSA-2021-0551](https://patchblox.com/security/data/fix/linux/elsa-2021-0551.md) | Feb 20, 2021 |
| Linux | nodejs-full-i18n RHEL 8 | 1:14.15.4-2.module+el8.3.0+9635+ffdf8381 | [RHSA-2021:0551](https://patchblox.com/security/data/fix/linux/rhsa-2021-0551.md) | Feb 16, 2021 |
| Linux | nodejs-full-i18n ol 8 | 1:14.15.4-2.module+el8.3.0+9657+a08a905a | [ELSA-2021-0551](https://patchblox.com/security/data/fix/linux/elsa-2021-0551.md) | Feb 20, 2021 |
| Linux | nodejs-nodemon RHEL 8 | 0:2.0.3-1.module+el8.3.0+6519+9f98ed83 | [RHSA-2021:0551](https://patchblox.com/security/data/fix/linux/rhsa-2021-0551.md) | Feb 16, 2021 |
| Linux | nodejs-nodemon ol 8 | 0:2.0.3-1.module+el8.3.0+7818+6cd30d85 | [ELSA-2021-0551](https://patchblox.com/security/data/fix/linux/elsa-2021-0551.md) | Feb 20, 2021 |
| Linux | nodejs-packaging RHEL 8 | 0:23-3.module+el8.3.0+6519+9f98ed83 | [RHSA-2021:0551](https://patchblox.com/security/data/fix/linux/rhsa-2021-0551.md) | Feb 16, 2021 |
| Linux | nodejs-packaging ol 8 | 0:23-3.module+el8.3.0+7818+6cd30d85 | [ELSA-2021-0551](https://patchblox.com/security/data/fix/linux/elsa-2021-0551.md) | Feb 20, 2021 |
| Linux | npm RHEL 8 | 1:6.14.10-1.14.15.4.2.module+el8.3.0+9635+ffdf8381 | [RHSA-2021:0551](https://patchblox.com/security/data/fix/linux/rhsa-2021-0551.md) | Feb 16, 2021 |
| Linux | npm ol 8 | 1:6.14.10-1.14.15.4.2.module+el8.3.0+9657+a08a905a | [ELSA-2021-0551](https://patchblox.com/security/data/fix/linux/elsa-2021-0551.md) | Feb 20, 2021 |

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