CVE-2023-38552
📋 TL;DR
CVE-2023-38552 is a security bypass vulnerability in Node.js's experimental policy mechanism that allows attackers to forge checksums and disable integrity checks. This affects all users of the policy feature in Node.js 18.x and 20.x releases. The vulnerability enables malicious code execution by bypassing resource integrity verification.
💻 Affected Systems
- Node.js
📦 What is this software?
Fedora by Fedoraproject
Fedora by Fedoraproject
Fedora by Fedoraproject
Node.js by Nodejs
Node.js by Nodejs
⚠️ Risk & Real-World Impact
Worst Case
Complete bypass of Node.js security policies leading to arbitrary code execution, privilege escalation, and full system compromise.
Likely Case
Attackers can load and execute untrusted modules that would normally be blocked by policy integrity checks, potentially leading to data theft or further exploitation.
If Mitigated
With proper network segmentation and least privilege, impact is limited to the compromised Node.js process scope.
🎯 Exploit Status
Exploitation requires the policy feature to be enabled and the attacker to be able to intercept/modify the integrity check operation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Node.js 18.18.1, 20.9.1 and later
Vendor Advisory: https://nodejs.org/en/blog/vulnerability/october-2023-security-releases/
Restart Required: Yes
Instructions:
1. Update Node.js to version 18.18.1 or 20.9.1 or later. 2. Restart all Node.js applications. 3. Verify the update with 'node --version'.
🔧 Temporary Workarounds
Disable Policy Mechanism
allDisable the experimental policy feature if not required
Remove or disable policy configuration in your Node.js application
🧯 If You Can't Patch
- Disable the experimental policy mechanism entirely
- Implement network segmentation and restrict Node.js applications to isolated environments
🔍 How to Verify
Check if Vulnerable:
Check if using Node.js 18.x or 20.x with policy feature enabled and version below 18.18.1 or 20.9.1Check Version:
node --versionVerify Fix Applied:
Verify Node.js version is 18.18.1+ or 20.9.1+ using 'node --version'📡 Detection & Monitoring
Log Indicators:
- Unexpected policy integrity check failures
- Policy bypass attempts in application logs
Network Indicators:
- Unusual outbound connections from Node.js processes
- Suspicious module loading patterns
SIEM Query:
source="nodejs" AND (event="policy_integrity_failure" OR event="policy_bypass")🔗 References
- https://hackerone.com/reports/2094235
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3N4NJ7FR4X4FPZUGNTQAPSTVB2HB2Y4A/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/E72T67UPDRXHIDLO3OROR25YAMN4GGW5/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FNA62Q767CFAFHBCDKYNPBMZWB7TWYVU/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HT7T2R4MQKLIF4ODV4BDLPARWFPCJ5CZ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LKYHSZQFDNR7RSA7LHVLLIAQMVYCUGBG/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6QXN4ORIVF6XBW4WWFE7VNPVC74S45Y/
- https://security.netapp.com/advisory/ntap-20231116-0013/
- https://hackerone.com/reports/2094235
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3N4NJ7FR4X4FPZUGNTQAPSTVB2HB2Y4A/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/E72T67UPDRXHIDLO3OROR25YAMN4GGW5/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FNA62Q767CFAFHBCDKYNPBMZWB7TWYVU/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HT7T2R4MQKLIF4ODV4BDLPARWFPCJ5CZ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LKYHSZQFDNR7RSA7LHVLLIAQMVYCUGBG/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6QXN4ORIVF6XBW4WWFE7VNPVC74S45Y/
- https://security.netapp.com/advisory/ntap-20231116-0013/
- https://security.netapp.com/advisory/ntap-20241108-0002/
