CVE-2015-3864 — AI Deep Analysis Summary

Q: Root Cause? (CWE/Flaw)

🔍 **Root Cause**: Integer Overflow vulnerability. 📉 **Flaw**: Improper handling of numeric values in `MPEG4Extractor.cpp` leads to memory corruption when parsing specific chunks.

Q: Who is affected? (Versions/Components)

📱 **Affected**: Android OS. 📅 **Versions**: 5.1 and earlier. 🧩 **Component**: `mediaserver` / `libstagefright` (MPEG-4 extractor).

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

💻 **Capabilities**: Remote Code Execution (RCE). 🛡️ **Privileges**: Attacker gains ability to perform arbitrary actions. 📈 **Impact**: Potential privilege escalation on the victim's device.

Q: Is exploitation threshold high? (Auth/Config)

⚡ **Threshold**: LOW. 🌐 **Auth**: None required (Remote). 📥 **Trigger**: Simply viewing/processing a malicious MP4 file. No user interaction beyond playback needed.

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

🔥 **Exploitation**: YES. 📂 **PoCs**: Multiple public PoCs available (e.g., `scaredycat`, `stagefright-cve-2015-3864`). 🕸️ **Status**: Wild exploitation tools exist (Metasploit modules, Python scripts).

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

🔎 **Check**: Scan for Android 5.1- versions. 📦 **Feature**: Check for `libstagefright` MPEG-4 parsing. 🛠️ **Tools**: Use vulnerability scanners detecting Stagefright flaws or check OS version history.

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

🛡️ **Fix**: Official patches released by Google. ✅ **Action**: Update Android OS to version > 5.1. 📝 **Note**: Data implies patch availability via standard OS updates.

Q: What if no patch? (Workaround)

🚫 **No Patch**: Disable media auto-play. 🚫 **No Patch**: Avoid opening unknown MP4 files. 📵 **No Patch**: Isolate device if possible. ⚠️ **Risk**: High exposure without mitigation.

Q: Is it urgent? (Priority Suggestion)

🔴 **Priority**: CRITICAL. 🚨 **Urgency**: HIGH. 📉 **Reason**: Remote, unauthenticated, widespread impact (95% of Android phones at time). Immediate patching required.

Updated May 08, 2026

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**: Integer overflow in `MPEG4Extractor::parseChunk` within `libstagefright`. 💥 **Consequences**: Remote attackers can execute arbitrary code via crafted MPEG-4 data.…

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Q2Root Cause? (CWE/Flaw)

🔍 **Root Cause**: Integer Overflow vulnerability. 📉 **Flaw**: Improper handling of numeric values in `MPEG4Extractor.cpp` leads to memory corruption when parsing specific chunks.

Q3Who is affected? (Versions/Components)

📱 **Affected**: Android OS. 📅 **Versions**: 5.1 and earlier. 🧩 **Component**: `mediaserver` / `libstagefright` (MPEG-4 extractor).

Q4What can hackers do? (Privileges/Data)

💻 **Capabilities**: Remote Code Execution (RCE). 🛡️ **Privileges**: Attacker gains ability to perform arbitrary actions. 📈 **Impact**: Potential privilege escalation on the victim's device.

Q5Is exploitation threshold high? (Auth/Config)

⚡ **Threshold**: LOW. 🌐 **Auth**: None required (Remote). 📥 **Trigger**: Simply viewing/processing a malicious MP4 file. No user interaction beyond playback needed.

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

🔥 **Exploitation**: YES. 📂 **PoCs**: Multiple public PoCs available (e.g., `scaredycat`, `stagefright-cve-2015-3864`). 🕸️ **Status**: Wild exploitation tools exist (Metasploit modules, Python scripts).

Q7How to self-check? (Features/Scanning)

🔎 **Check**: Scan for Android 5.1- versions. 📦 **Feature**: Check for `libstagefright` MPEG-4 parsing. 🛠️ **Tools**: Use vulnerability scanners detecting Stagefright flaws or check OS version history.

Q8Is it fixed officially? (Patch/Mitigation)

🛡️ **Fix**: Official patches released by Google. ✅ **Action**: Update Android OS to version > 5.1. 📝 **Note**: Data implies patch availability via standard OS updates.

Q9What if no patch? (Workaround)

🚫 **No Patch**: Disable media auto-play. 🚫 **No Patch**: Avoid opening unknown MP4 files. 📵 **No Patch**: Isolate device if possible. ⚠️ **Risk**: High exposure without mitigation.

Q10Is it urgent? (Priority Suggestion)

🔴 **Priority**: CRITICAL. 🚨 **Urgency**: HIGH. 📉 **Reason**: Remote, unauthenticated, widespread impact (95% of Android phones at time). Immediate patching required.

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