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.
NVD Severity
Other trackers
Mailing lists
GitHub (code, issues), Aports (code, issues)


Type URI

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:tar_project:tar:*:*:*:*:*:node.js:*:* tar >= None < 3.2.2
cpe:2.3:a:tar_project:tar:*:*:*:*:*:node.js:*:* tar >= 4.0.0 < 4.4.14
cpe:2.3:a:tar_project:tar:*:*:*:*:*:node.js:*:* tar >= 5.0.0 < 5.0.6
cpe:2.3:a:tar_project:tar:*:*:*:*:*:node.js:*:* tar >= 6.0.0 < 6.1.1

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
tar 3.13-main 1.34-r0 Carlo Landmeter <> possibly vulnerable
tar 3.12-main 1.32-r2 Carlo Landmeter <> possibly vulnerable
tar 3.11-main 1.32-r2 Carlo Landmeter <> possibly vulnerable
tar 3.17-main 1.34-r2 Carlo Landmeter <> fixed
tar 3.16-main 1.34-r1 Carlo Landmeter <> fixed
tar 3.15-main 1.34-r1 Carlo Landmeter <> possibly vulnerable
tar 3.14-main 1.34-r1 Carlo Landmeter <> possibly vulnerable
tar 3.18-main 1.34-r3 Carlo Landmeter <> fixed
tar edge-main 1.35-r2 Carlo Landmeter <> fixed
tar 3.19-main 1.35-r2 Carlo Landmeter <> fixed