CVE-2014-8142 — AI Deep Analysis Summary

🚨 **What is this vulnerability?** * **Type:** Use-After-Free (UAF) bug. * **Location:** `process_nested_data` function in `ext/standard/var_unserializer.re`. * **Core Issue:** PHP's unserializer mishandles memory …

🛡️ **Root Cause? (CWE/Flaw)** * **Flaw:** Memory management error. * **Mechanism:** Object is freed, but pointer remains valid. * **Trigger:** Specific non-serialized call patterns. * **Result:** Reusing the fre…

📦 **Who is affected? (Versions/Components)** * **Component:** PHP (Hypertext Preprocessor). * **Affected Versions:** * PHP 5.4.x **before** 5.4.36. * PHP 5.5.x **before** 5.5.20. * PHP 5.6 (All ver…

💀 **What can hackers do? (Privileges/Data)** * **Action:** Execute arbitrary code. * **Vector:** Remote exploitation. * **Method:** Send specially crafted unserialized data. * **Privilege:** Code runs with PHP p…

🔓 **Is exploitation threshold high? (Auth/Config)** * **Auth Required:** No (Remote/Unauthenticated). * **Complexity:** Moderate (Requires specific payload). * **Access:** Needs ability to trigger PHP unserializat…

💣 **Is there a public Exp? (PoC/Wild Exploitation)** * **PoC Available:** Yes. * **Source:** GitHub repo `3xp10it/php_cve-2014-8142_cve-2015-0231`. * **Format:** Docker environment for testing. * **Status:** Pub…

🔍 **How to self-check? (Features/Scanning)** * **Check Version:** Run `php -v` on servers. * **Verify Paths:** Look for `var_unserializer.re` in source. * **Scan:** Use vulnerability scanners targeting PHP UAF. * …

🩹 **Is it fixed officially? (Patch/Mitigation)** * **Status:** Fixed in later versions. * **Fix Version:** PHP 5.4.36+ and 5.5.20+. * **Source:** PHP ChangeLog confirms fix. * **Vendor:** PHP Group released patc…

🚧 **What if no patch? (Workaround)** * **Input Validation:** Strictly validate unserialized data. * **Disable:** Disable `unserialize()` if not needed. * **Sandboxing:** Run PHP in restricted containers. * **WAF…

⚡ **Is it urgent? (Priority Suggestion)** * **Priority:** CRITICAL. * **Reason:** Remote Code Execution (RCE). * **Availability:** Public PoC exists. * **Impact:** Total system compromise. * **Advice:** Patch …