CVE-2021-32804
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- CVE-2021-32804
CVE Details
| Release Date: | 2021-08-03 |
Description
The npm package tar (aka node-tar) before versions 6.1.1, 5.0.6, 4.4.14, and 3.3.2 has a arbitrary File Creation/Overwrite vulnerability due to insufficient absolute path sanitization. node-tar aims to prevent extraction of absolute file paths by turning absolute paths into relative paths when the preservePaths flag is not set to true. This is achieved by stripping the absolute path root from any absolute file paths contained in a tar file. For example /home/user/.bashrc would turn into home/user/.bashrc. This logic was insufficient when file paths contained repeated path roots such as ////home/user/.bashrc. node-tar would only strip a single path root from such paths. When given an absolute file path with repeating path roots, the resulting path (e.g. ///home/user/.bashrc) would still resolve to an absolute path, thus allowing arbitrary file creation and overwrite. This issue was addressed in releases 3.2.2, 4.4.14, 5.0.6 and 6.1.1. Users may work around this vulnerability without upgrading by creating a custom onentry method which sanitizes the entry.path or a filter method which removes entries with absolute paths. See referenced GitHub Advisory for details. Be aware of CVE-2021-32803 which fixes a similar bug in later versions of tar.
See more information about CVE-2021-32804 from MITRE CVE dictionary and NIST NVD
CVSS v3.0 metrics
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
| Base Score: | 8.1 | Base Metrics: | AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H |
| Access Vector: | Network | Attack Complexity: | Low |
| Privileges Required: | None | User Interaction: | Required |
| Scope: | Unchanged | Confidentiality Impact: | None |
| Integrity Impact: | High | Availability Impact: | High |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 8 (nodejs) | ELSA-2021-3623 | 2021-09-22 |
| Oracle Linux version 8 (nodejs) | ELSA-2021-3666 | 2021-09-27 |
| Oracle Linux version 8 (nodejs-nodemon) | ELSA-2021-3623 | 2021-09-22 |
| Oracle Linux version 8 (nodejs-nodemon) | ELSA-2021-3666 | 2021-09-27 |
| Oracle Linux version 8 (nodejs-packaging) | ELSA-2021-3623 | 2021-09-22 |
| Oracle Linux version 8 (nodejs-packaging) | ELSA-2021-3666 | 2021-09-27 |
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