CVE-2020-1631 — AI Deep Analysis Summary

Q: What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Path Traversal in Junos OS J-Web. 💥 **Consequences**: Command injection into logs, file reading, or session token theft. Critical impact on Confidentiality, Integrity, and Availability.

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: CWE-22 (Path Traversal). 🔍 **Flaw**: Improper neutralization of special elements in filenames. Allows attackers to access files outside the intended directory via HTTP/HTTPS services.

Q: Who is affected? (Versions/Components)

📦 **Affected Products**: Juniper Networks Junos OS. 📅 **Versions**: 12.3, 12.3X48, 14.1X53, 15.1. ⚠️ **Component**: J-Web and Web-based services.

Q: What can hackers do? (Privileges/Data)

🕵️ **Attacker Actions**: 1. Inject commands into `httpd.log`. 2. Read sensitive system files. 3. Steal J-Web session tokens. 🔑 **Privileges**: High (CVSS 9.8). Can lead to full system compromise.

Q: Is there a public Exp? (PoC/Wild Exploitation)

🚫 **Public Exploit**: No PoC provided in data. 📉 **Wild Exploitation**: Unknown. 📝 **Note**: CVSS indicates high severity, so exploitation is likely feasible if a PoC exists.

Q: How to self-check? (Features/Scanning)

🔍 **Self-Check**: 1. Scan for Junos OS versions 12.3, 12.3X48, 14.1X53, 15.1. 2. Check if J-Web service is exposed. 3. Look for path traversal patterns in web logs targeting `httpd.log`.

Q: Is it fixed officially? (Patch/Mitigation)

✅ **Official Fix**: Yes. 📄 **Reference**: Juniper Security Advisory JSA11021. 🔗 **Link**: https://kb.juniper.net/JSA11021. 🛠️ **Action**: Update Junos OS to patched versions immediately.

Q: What if no patch? (Workaround)

🚧 **No Patch Workaround**: 1. Restrict access to J-Web (Firewall rules). 2. Disable unnecessary web services. 3. Monitor `httpd.log` for injection attempts. 4. Rotate session tokens frequently.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: CRITICAL. 📊 **CVSS**: 9.8 (Critical). ⚡ **Priority**: Immediate patching required. 🎯 **Reason**: High impact, low exploitation barrier, affects critical network infrastructure.

Updated May 06, 2026 CVSS 8.8 · High

This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis →

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Path Traversal in Junos OS J-Web. <br>💥 **Consequences**: Command injection into logs, file reading, or session token theft. Critical impact on Confidentiality, Integrity, and Availability.

Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: CWE-22 (Path Traversal). <br>🔍 **Flaw**: Improper neutralization of special elements in filenames. Allows attackers to access files outside the intended directory via HTTP/HTTPS services.

Q3Who is affected? (Versions/Components)

📦 **Affected Products**: Juniper Networks Junos OS. <br>📅 **Versions**: 12.3, 12.3X48, 14.1X53, 15.1. <br>⚠️ **Component**: J-Web and Web-based services.

Q4What can hackers do? (Privileges/Data)

🕵️ **Attacker Actions**: <br>1. Inject commands into `httpd.log`. <br>2. Read sensitive system files. <br>3. Steal J-Web session tokens. <br>🔑 **Privileges**: High (CVSS 9.8). Can lead to full system compromise.

Q5Is exploitation threshold high? (Auth/Config)

🔓 **Threshold**: Low. <br>🌐 **Access**: Network Accessible (AV:N). <br>🔑 **Auth**: No Privileges Required (PR:N).…

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Q6Is there a public Exp? (PoC/Wild Exploitation)

🚫 **Public Exploit**: No PoC provided in data. <br>📉 **Wild Exploitation**: Unknown. <br>📝 **Note**: CVSS indicates high severity, so exploitation is likely feasible if a PoC exists.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: <br>1. Scan for Junos OS versions 12.3, 12.3X48, 14.1X53, 15.1. <br>2. Check if J-Web service is exposed. <br>3. Look for path traversal patterns in web logs targeting `httpd.log`.

Q8Is it fixed officially? (Patch/Mitigation)

✅ **Official Fix**: Yes. <br>📄 **Reference**: Juniper Security Advisory JSA11021. <br>🔗 **Link**: https://kb.juniper.net/JSA11021. <br>🛠️ **Action**: Update Junos OS to patched versions immediately.

Q9What if no patch? (Workaround)

🚧 **No Patch Workaround**: <br>1. Restrict access to J-Web (Firewall rules). <br>2. Disable unnecessary web services. <br>3. Monitor `httpd.log` for injection attempts. <br>4. Rotate session tokens frequently.

Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: CRITICAL. <br>📊 **CVSS**: 9.8 (Critical). <br>⚡ **Priority**: Immediate patching required. <br>🎯 **Reason**: High impact, low exploitation barrier, affects critical network infrastructure.

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Vulnerability detail Full AI analysis (login) Juniper Networks CWE-22