Protected file modification via unchecked descriptors
Published Sep 7, 2024 · Updated Apr 30, 2025
Permission-model bypass in Node.js 20 before 20.15.1 and Node.js 22 before 22.4.1 allows local users to alter protected file metadata. The fs.fchmod and fs.fchown APIs accept a read-only file descriptor and change its target's mode or ownership without enforcing write permission. Exploitation requires the experimental Permission Model with --allow-fs-write and code execution in the Node.js process; impact is limited to file integrity.
Summary
What happened
Permission-model bypass in Node.js 20 before 20.15.1 and Node.js 22 before 22.4.1 allows local users to alter protected file metadata. The fs.fchmod and fs.fchown APIs accept a read-only file descriptor and change its target's mode or ownership without enforcing write permission. Exploitation requires the experimental Permission Model with --allow-fs-write and code execution in the Node.js process; impact is limited to file integrity.
The record
- CVE
- CVE-2024-36137
- Published
- Sep 7, 2024
- Updated
- Apr 30, 2025
- Vendor
- Node.js
- Product
- Node.js
- Classifications
- T1222.002
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 7, 2024CVE publishedPublication date reported by the CVE source.
- Apr 30, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0 <10.*
- Affected versionversion=11.0 <11.*
- Affected versionversion=12.0 <12.*
- Affected versionversion=13.0 <13.*
- Affected versionversion=14.0 <14.*
- Affected versionversion=15.0 <15.*
- Affected versionversion=16.0 <16.*
- Affected versionversion=17.0 <17.*
- Affected versionversion=19.0 <19.*
- Affected versionversion=20.0 <20.15.1
- Affected versionversion=21.0 <21.*
- Affected versionversion=22.0 <22.4.1
- Affected versionversion=4.0 <4.*
- Affected versionversion=5.0 <5.*
- Affected versionversion=6.0 <6.*
- Affected versionversion=7.0 <7.*
- Affected versionversion=8.0 <8.*
- Affected versionversion=9.0 <9.*
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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