Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Tar Project | Tar | < 3.2.2 |
| Oracle | Graalvm | 20.3.3 |
| Siemens | Sinec Infrastructure Network Services | < 1.0.1.1 |
Related Weaknesses (CWE)
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatchThird Party Advisory
- https://github.com/npm/node-tar/commit/1f036ca23f64a547bdd6c79c1a44bc62e8115da4PatchThird Party Advisory
- https://github.com/npm/node-tar/security/advisories/GHSA-3jfq-g458-7qm9MitigationThird Party Advisory
- https://www.npmjs.com/advisories/1770MitigationThird Party Advisory
- https://www.npmjs.com/package/tarProductThird Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatchThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatchThird Party Advisory
- https://github.com/npm/node-tar/commit/1f036ca23f64a547bdd6c79c1a44bc62e8115da4PatchThird Party Advisory
- https://github.com/npm/node-tar/security/advisories/GHSA-3jfq-g458-7qm9MitigationThird Party Advisory
- https://www.npmjs.com/advisories/1770MitigationThird Party Advisory
- https://www.npmjs.com/package/tarProductThird Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatchThird Party Advisory
FAQ
What is CVE-2021-32804?
CVE-2021-32804 is a vulnerability with a CVSS score of 8.2 (HIGH). 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...
How severe is CVE-2021-32804?
CVE-2021-32804 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-32804?
Check the references section above for vendor advisories and patch information. Affected products include: Tar Project Tar, Oracle Graalvm, Siemens Sinec Infrastructure Network Services.