Filesystem permission bypass via malformed UNC paths
Published Jan 9, 2025 · Updated May 2, 2025
Path traversal in Node.js 20.x before 20.15.1 and 22.x before 22.4.1 allows local users to bypass filesystem restrictions on Windows. The path lookup in src/permission/fs_permission.cc removes four characters from every resolved path beginning with two backslashes, even when no extended-length prefix is present. A Permission Model-enabled process must check a crafted UNC path; successful exploitation grants unintended file reads or writes within the process's existing OS privileges.
Summary
What happened
Path traversal in Node.js 20.x before 20.15.1 and 22.x before 22.4.1 allows local users to bypass filesystem restrictions on Windows. The path lookup in src/permission/fs_permission.cc removes four characters from every resolved path beginning with two backslashes, even when no extended-length prefix is present. A Permission Model-enabled process must check a crafted UNC path; successful exploitation grants unintended file reads or writes within the process's existing OS privileges.
The record
- CVE
- CVE-2024-37372
- Published
- Jan 9, 2025
- Updated
- May 2, 2025
- Vendor
- Node.js
- Product
- Node.js
- Classifications
- CWE-22, T1005
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 9, 2025CVE publishedPublication date reported by the CVE source.
- May 2, 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
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Technologies
Your stack
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Your stack
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