CVE-2024-21896

Description

The permission model protects itself against path traversal attacks by calling path.resolve() on any paths given by the user. If the path is to be treated as a Buffer, the implementation uses Buffer.from() to obtain a Buffer from the result of path.resolve(). By monkey-patching Buffer internals, namely, Buffer.prototype.utf8Write, the application can modify the result of path.resolve(), which leads to a path traversal vulnerability. This vulnerability affects all users using the experimental permission model in Node.js 20 and Node.js 21. Please note that at the time this CVE was issued, the permission model is an experimental feature of Node.js.

CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-27 CWE-27

Affected Products

Vendor	Product	Versions
nodejs	node.js	20.0.0 — 20.11.1
nodejs	node.js	21.0.0 — 21.6.2

References

Other References

http://www.openwall.com/lists/oss-security/2024/03/11/1 https://hackerone.com/reports/2218653 https://security.netapp.com/advisory/ntap-20240329-0002/ http://www.openwall.com/lists/oss-security/2024/03/11/1 https://hackerone.com/reports/2218653 https://security.netapp.com/advisory/ntap-20240329-0002/

Frequently Asked Questions

What is CVE-2024-21896? +

The permission model protects itself against path traversal attacks by calling path.resolve() on any paths given by the user. If the path is to be treated as a Buffer, the implementation uses Buffer.from() to obtain a Buffer from the result of path.resolve(). By monkey-patching Buffer internals, namely, Buffer.prototype.utf8Write, the application can modify the result of path.resolve(), which leads to a path traversal vulnerability. This vulnerability affects all users using the experimental permission model in Node.js 20 and Node.js 21. Please note that at the time this CVE was issued, the permission model is an experimental feature of Node.js. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2024-21896? +

CVE-2024-21896 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2024-21896? +

CVE-2024-21896 affects products from nodejs, specifically: node.js. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-21896? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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