CVE-2020-5775 — AI Deep Analysis Summary

🚨 **Essence**: Blind Server-Side Request Forgery (SSRF) in Canvas LMS. 📉 **Consequences**: The app makes HTTP GET requests to arbitrary domains.…

🛡️ **Root Cause**: Code flaw allowing unauthenticated SSRF. 🚫 **CWE**: Not specified in data. ⚠️ **Flaw**: Lack of validation on outbound HTTP requests to external domains.

🎓 **Affected**: Instructure Canvas LMS. 📅 **Version**: Specifically **2020-07-29**. 🌐 **Vendor**: Instructure. 📦 **Product**: Learning Management System.

🕵️ **Actions**: Force Canvas to request arbitrary URLs. 🔓 **Privileges**: **Unauthenticated** attacker. 💾 **Data**: Potential access to internal/sensitive data via SSRF.…

🔓 **Auth**: **None required**. 🎯 **Threshold**: **Low**. Any user can trigger this without logging in. 🚪 **Config**: No specific config needed; inherent in the vulnerable version.

📜 **PoC**: Yes. 🔗 **Link**: ProjectDiscovery Nuclei template available. 🌍 **Wild Exp**: High risk due to unauthenticated nature. 🧪 **Status**: Publicly documented in Tenable research.

🔍 **Check**: Scan for Canvas LMS version **2020-07-29**. 🛠️ **Tool**: Use Nuclei templates (CVE-2020-5775.yaml). 📡 **Feature**: Look for SSRF behavior in HTTP requests. 📋 **Ref**: Tenable TRA-2020-49.

🩹 **Patch**: Update Canvas LMS to a version newer than 2020-07-29. 📢 **Official**: Instructure released fixes. ✅ **Action**: Apply vendor patches immediately. 🔄 **Status**: Fixed in subsequent releases.

🚧 **Workaround**: Block outbound HTTP requests from Canvas server. 🛑 **Network**: Restrict egress traffic to trusted domains only. 🛡️ **WAF**: Deploy WAF rules to detect SSRF patterns.…

🔥 **Urgency**: **HIGH**. 🚨 **Priority**: Critical. ⚡ **Reason**: Unauthenticated SSRF allows easy exploitation. 🏃 **Action**: Patch immediately. 📉 **Risk**: Data breach or unauthorized access likely.