CVE-2025-21042 PoC — SAMSUNG SMR 安全漏洞

Description

CVE-2025-21042

Readme

# 🔐 **CVE-2025-21042 — Samsung Image Codec Remote Code Execution**

### ⚙️ **What it is**

A **critical** vulnerability in Samsung’s image-processing library
**`libimagecodec.quram.so`** — used on Galaxy Android devices.
🧩 It’s an **out-of-bounds write** flaw triggered when parsing **malicious image files** (like DNG).
📸 A crafted image can let attackers **run arbitrary code remotely** on the device.

> “Out-of-bounds write in libimagecodec.quram.so prior to SMR Apr-2025 Release 1 allows remote attackers to execute arbitrary code.”
> — *NVD Summary*

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### 🚨 **Severity**

<img width="894" height="273" alt="word-image-895711-164365-4" src="https://github.com/user-attachments/assets/457a1713-e627-4c20-973f-b44b23d71c61" />

| Metric                  | Value                         |
| :---------------------- | :---------------------------- |
| **CVSS v3.1 Score**     | 💣 **9.8 / 10 (CRITICAL)**    |
| **Attack Vector**       | 🌐 Network                    |
| **Privileges Required** | ❌ None                        |
| **User Interaction**    | ⚙️ None (Zero-click possible) |

👉 Translation: an attacker could compromise your phone **just by sending you an image** — no taps needed.

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### 🧨 **Exploitation in the Wild**

<img width="1790" height="1252" alt="word-image-884886-164365-1" src="https://github.com/user-attachments/assets/8e499a34-dc68-40a8-b014-5e8094b91146" />

* 🕵️‍♂️ Exploited as part of **LANDFALL**, a **commercial-grade Android spyware** campaign.
* 🎯 Targets: Samsung Galaxy S22/S23/S24, Fold4, Flip4.
* 🌍 Regions hit: **Middle East (Iraq, Iran, Turkey, Morocco)**.
* 🧠 Delivered through messaging apps or other channels with malicious image attachments.

> Used by spyware operators to gain full control of affected devices — including camera, mic, and data exfiltration.

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### 🧩 **Who’s Affected**

📱 **Samsung Android devices** running firmware **before**
➡️ **SMR Apr-2025 Release 1**

If your device hasn’t received that patch — you’re still vulnerable.

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### 🛡️ **How to Stay Safe**

<img width="2048" height="1675" alt="word-image-902272-164365-6" src="https://github.com/user-attachments/assets/4f495995-e74e-4f12-a85a-9b6be30203a9" />

✅ **Update now:**
Go to **Settings → Software Update → Download and Install**
Make sure your security patch level is **April 2025** or later.

🚫 **Avoid:**

* Opening image files from unknown senders 📁
* Downloading photos from suspicious links 🌐

🏢 **For enterprises:**

* Enforce mobile device management (MDM) compliance.
* Audit fleet patch levels for Samsung devices immediately.

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### 🔍 **Extra Context**

* CVE-2025-21042 is part of a trend in **image-based zero-click exploits**.
* Similar bugs have been used in **Pegasus** and other mobile spyware.
* Shows how even “innocent” file types like photos can be weaponized. 💀

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### 📚 **References**

* 🧾 [NVD Entry](https://nvd.nist.gov/vuln/detail/CVE-2025-21042)
* 🔐 [ZeroPath Analysis](https://zeropath.com/blog/cve-2025-21042-samsung-libimagecodec-quram-so-summary)
* 🕵️‍♀️ [Palo Alto Unit 42 Report](https://unit42.paloaltonetworks.com/landfall-is-new-commercial-grade-android-spyware/)
* 📰 [The Hacker News Coverage](https://thehackernews.com/2025/11/samsung-zero-click-flaw-exploited-to.html)

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