CVE Vulnerability

CVE-2021-32804

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.

5.8 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 4.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

8.1 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://www.npmjs.com/advisories/1770 Mitigation Third Party Advisory
https://github.com/npm/node-tar/commit/1f036ca23f64a547bdd6c79c1a44bc62e8115da4 Patch Third Party Advisory
https://github.com/npm/node-tar/security/advisories/GHSA-3jfq-g458-7qm9 Mitigation Third Party Advisory
https://www.npmjs.com/package/tar Product Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html Patch Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:tar_project:tar:*:*:*:*:*:node.js:*:*
cpe:2.3:a:tar_project:tar:*:*:*:*:*:node.js:*:*
cpe:2.3:a:tar_project:tar:*:*:*:*:*:node.js:*:*
cpe:2.3:a:tar_project:tar:*:*:*:*:*:node.js:*:*
cpe:2.3:a:oracle:graalvm:20.3.3:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:graalvm:21.2.0:*:*:*:enterprise:*:*:*
cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*
Information

Published : 2021-08-03 07:15

Updated : 2022-04-25 07:12

NVD link : CVE-2021-32804

Mitre link : CVE-2021-32804

Products Affected
No products.
CWE
CWE-22