CVE-2020-5258
📋 TL;DR
CVE-2020-5258 is a prototype pollution vulnerability in the Dojo Toolkit's deepCopy method that allows attackers to inject malicious properties into JavaScript object prototypes. This affects applications using vulnerable versions of the dojo NPM package, potentially leading to denial of service, remote code execution, or privilege escalation.
💻 Affected Systems
- Dojo Toolkit
- Applications using dojo NPM package
📦 What is this software?
Communications Application Session Controller by Oracle
View all CVEs affecting Communications Application Session Controller →
Communications Policy Management by Oracle
Communications Pricing Design Center by Oracle
View all CVEs affecting Communications Pricing Design Center →
Documaker by Oracle
Dojo by Linuxfoundation
Dojo by Linuxfoundation
Dojo by Linuxfoundation
Dojo by Linuxfoundation
Dojo by Linuxfoundation
Dojo by Linuxfoundation
Mysql by Oracle
Mysql by Oracle
Mysql by Oracle
Mysql by Oracle
Mysql by Oracle
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data exfiltration, or persistent backdoor installation.
Likely Case
Denial of service, application crashes, or privilege escalation within the affected application.
If Mitigated
Limited impact with proper input validation and sandboxing, potentially only causing application instability.
🎯 Exploit Status
Exploitation requires attacker-controlled input to the deepCopy method, which is common in web applications.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.12.8, 1.13.7, 1.14.6, 1.15.3, or 1.16.2
Vendor Advisory: https://github.com/dojo/dojo/security/advisories/GHSA-jxfh-8wgv-vfr2
Restart Required: Yes
Instructions:
1. Identify dojo version in package.json. 2. Update to patched version: npm update dojo@^1.12.8 or appropriate version. 3. Restart application. 4. Test functionality.
🔧 Temporary Workarounds
Input validation and sanitization
allImplement strict input validation for all data passed to deepCopy method
Object.freeze on prototypes
allFreeze Object.prototype to prevent pollution
Object.freeze(Object.prototype);
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all user inputs
- Use alternative libraries or custom implementations instead of vulnerable deepCopy method
🔍 How to Verify
Check if Vulnerable:
Check package.json for dojo version: grep -i dojo package.jsonCheck Version:
npm list dojoVerify Fix Applied:
Verify installed version: npm list dojo | grep dojo📡 Detection & Monitoring
Log Indicators:
- Unexpected application crashes
- Unusual prototype property modifications
- Memory usage spikes
Network Indicators:
- Malformed JSON payloads to APIs using deepCopy
- Suspicious property names in requests
SIEM Query:
source="application_logs" AND ("deepCopy" OR "prototype") AND (error OR crash)🔗 References
- https://github.com/dojo/dojo/commit/20a00afb68f5587946dc76fbeaa68c39bda2171d
- https://github.com/dojo/dojo/security/advisories/GHSA-jxfh-8wgv-vfr2
- https://lists.apache.org/thread.html/r3638722360d7ae95f874280518b8d987d799a76df7a9cd78eac33a1b%40%3Cusers.qpid.apache.org%3E
- https://lists.apache.org/thread.html/r665fcc152bd0fec9f71511a6c2435ff24d3a71386b01b1a6df326fd3%40%3Cusers.qpid.apache.org%3E
- https://lists.apache.org/thread.html/rf481b3f25f05c52ba4e24991a941c1a6e88d281c6c9360a806554d00%40%3Cusers.qpid.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2020/03/msg00012.html
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://github.com/dojo/dojo/commit/20a00afb68f5587946dc76fbeaa68c39bda2171d
- https://github.com/dojo/dojo/security/advisories/GHSA-jxfh-8wgv-vfr2
- https://lists.apache.org/thread.html/r3638722360d7ae95f874280518b8d987d799a76df7a9cd78eac33a1b%40%3Cusers.qpid.apache.org%3E
- https://lists.apache.org/thread.html/r665fcc152bd0fec9f71511a6c2435ff24d3a71386b01b1a6df326fd3%40%3Cusers.qpid.apache.org%3E
- https://lists.apache.org/thread.html/rf481b3f25f05c52ba4e24991a941c1a6e88d281c6c9360a806554d00%40%3Cusers.qpid.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2020/03/msg00012.html
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
