CVE-2021-43852
📋 TL;DR
CVE-2021-43852 is a prototype pollution vulnerability in OroPlatform that allows attackers to inject malicious properties into JavaScript prototypes via specially crafted requests. This could lead to JavaScript code execution in libraries vulnerable to prototype pollution. Affects OroPlatform users running versions before 4.2.8.
💻 Affected Systems
- OroPlatform
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, and lateral movement within the environment.
Likely Case
JavaScript code execution in the context of the web application, potentially leading to session hijacking, data manipulation, or privilege escalation.
If Mitigated
Limited impact with proper input validation and firewall rules blocking malicious payloads.
🎯 Exploit Status
Exploitation requires crafting specific requests with prototype pollution payloads but doesn't require authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.2.8
Vendor Advisory: https://github.com/oroinc/platform/security/advisories/GHSA-jx5q-g37m-h5hj
Restart Required: Yes
Instructions:
1. Backup your OroPlatform installation. 2. Update to version 4.2.8 or later via composer: 'composer require oro/platform:^4.2.8'. 3. Clear cache: 'php bin/console cache:clear'. 4. Restart web server.
🔧 Temporary Workarounds
Firewall Rule to Block Prototype Pollution Payloads
allConfigure web application firewall to drop requests containing prototype pollution strings
# Example for Apache mod_security: SecRule ARGS "@rx (__proto__|constructor\[prototype\]|constructor\.prototype)" "id:1001,phase:2,deny,status:403"
🧯 If You Can't Patch
- Implement strict input validation to reject requests containing __proto__, constructor[prototype], or constructor.prototype strings
- Deploy web application firewall with rules to block prototype pollution payloads
🔍 How to Verify
Check if Vulnerable:
Check OroPlatform version via composer: 'composer show oro/platform | grep version'Check Version:
composer show oro/platform | grep versionVerify Fix Applied:
Verify version is 4.2.8 or higher and test with sample payloads containing __proto__ strings📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing __proto__, constructor[prototype], or constructor.prototype strings
- Unusual JavaScript errors or prototype modifications in application logs
Network Indicators:
- HTTP requests with prototype pollution payloads in parameters or headers
SIEM Query:
source="web_logs" AND ("__proto__" OR "constructor[prototype]" OR "constructor.prototype")🔗 References
- https://github.com/oroinc/platform/commit/62c26936b3adee9c20255dcd9f8ee5c299b464a9
- https://github.com/oroinc/platform/security/advisories/GHSA-jx5q-g37m-h5hj
- https://github.com/oroinc/platform/commit/62c26936b3adee9c20255dcd9f8ee5c299b464a9
- https://github.com/oroinc/platform/security/advisories/GHSA-jx5q-g37m-h5hj
