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Q1What is this vulnerability? (Essence + Consequences)
🚨 **Essence**: A security flaw in PHP's **PHAR** 404 error handling. <br>⚠️ **Consequences**: Remote attackers can execute **arbitrary script code** in the victim's browser via crafted URLs.…
📦 **Affected Versions**: <br>• PHP **5.6.33** and earlier <br>• PHP **7.0.x** before 7.0.27 <br>• PHP **7.1.x** before 7.1.13 <br>• PHP **7.2.x** before 7.2.1 <br>🌐 **Component**: PHP Core (PHAR stream wrapper).
Q4What can hackers do? (Privileges/Data)
💻 **Attacker Actions**: <br>• Execute **arbitrary JavaScript** in the user's browser. <br>• Steal session cookies or credentials. <br>• Perform actions on behalf of the victim.…
🔓 **Exploitation Threshold**: **LOW**. <br>• **Auth**: No authentication required (Remote). <br>• **Config**: Requires the server to serve PHAR files and trigger a 404.…
📜 **Public Exploit**: The data lists **vendor advisories** (RedHat, Ubuntu, Debian) and BID 104020, but **no specific PoC code** is provided in the `pocs` array.…
🔍 **Self-Check**: <br>1. Check PHP version (`php -v`). <br>2. Look for servers serving `.phar` files. <br>3. Test if accessing a non-existent `.phar` URL injects script tags into the 404 response. <br>4.…
🔥 **Urgency**: **HIGH**. <br>• **CVSS**: Not provided, but XSS via PHAR is critical. <br>• **Impact**: Direct browser compromise. <br>• **Recommendation**: Patch immediately.…