CVE-2020-28948 — AI Deep Analysis Summary

🚨 **Essence**: A critical **Deserialization Vulnerability** in Pear Archive_Tar. <br>💥 **Consequences**: Attackers can execute **Remote Code Execution (RCE)** via malicious PHAR files.…

🛡️ **Root Cause**: Improper input validation in **PHP deserialization**.…

📦 **Affected**: **Pear Archive_Tar** library. <br>📅 **Version**: **1.4.10 and earlier**. <br>🌐 **Impact**: Widely used by **Drupal** (SA-CORE-2020-013) and other PHP applications relying on this PEAR package.

💀 **Attacker Actions**: <br>1️⃣ **RCE**: Execute arbitrary PHP code on the server. <br>2️⃣ **Data Theft**: Access sensitive files via PHAR wrappers.…

⚡ **Exploitation Threshold**: **Low to Medium**. <br>🔑 **Auth**: Often requires **upload functionality** or access to tar extraction features.…

🔓 **Public Exploit**: **YES**. <br>📂 **PoC Available**: Multiple GitHub repos (e.g., `0x240x23elu`, `nopdata`) contain working PoCs.…

🔍 **Self-Check**: <br>1️⃣ Scan for **Archive_Tar** library version. <br>2️⃣ Check for **PHP PHAR** usage in upload handlers. <br>3️⃣ Use scanners detecting **Deserialization** flaws in PHP apps.…

✅ **Fixed**: **YES**. <br>🔧 **Patch**: Updated versions of Archive_Tar block the vulnerability. <br>📢 **Advisories**: Fixed in **Drupal SA-CORE-2020-013**, **Debian DSA-4817**, and **Fedora** updates.

🛡️ **No Patch Workaround**: <br>1️⃣ **Disable** tar extraction features if not needed. <br>2️⃣ **Sanitize** inputs: Block `phar://` wrappers explicitly.…

🔥 **Urgency**: **CRITICAL**. <br>⏱️ **Priority**: **Immediate Action Required**. <br>🚀 **Reason**: Active exploitation in the wild, widespread impact (Drupal), and easy PoC availability. Patch immediately to prevent RCE.