Recently, a critical vulnerability has been discovered in Google Chrome on Android devices that allowed a remote attacker to potentially exploit heap corruption via a carefully crafted HTML page. This vulnerability has been assigned the CVE number CVE-2025-1426 and was rated with a security severity of "high" by Chromium. The affected versions are those prior to 133..6943.126. In this post, we will provide a detailed analysis of this vulnerability, including code snippets, links to original references, and other exploit details.

Vulnerability Description

CVE-2025-1426 is caused due to a heap buffer overflow in GPU (Graphics Processing Unit) in Google Chrome on Android devices. Heap buffer overflow is a type of vulnerability that occurs when data is written to a buffer beyond its allocated size, causing adjacent memory to be overwritten. This could lead to arbitrary code execution, data corruption, or even a system crash. In this case, a remote attacker could exploit this vulnerability by creating a malicious HTML page containing carefully crafted code that triggers the heap buffer overflow.

Code Snippet

Here is a simplified code snippet to demonstrate the heap buffer overflow vulnerability in the GPU in Google Chrome on Android devices:

// HTML code
<!DOCTYPE html>
<html>
<head>
<script>
  ... JavaScript code to trigger the heap buffer overflow ...
</script>
</head>
<body>
  <canvas id="myCanvas"></canvas>
</body>
</html>

In this code, an HTML canvas is created, and the JavaScript code is executed when the page is loaded. The JavaScript code contains the logic to trigger the heap buffer overflow in the GPU.

Original References

- Chromium Security Advisory: Link
- Google Chrome Release Blog: Link

Exploit Details

To exploit this vulnerability, an attacker needs to create a crafted HTML page containing the malicious code that triggers the heap buffer overflow. The attacker can then send the link to the target user, either via email, chat, or any other communication method.

Once the target user opens the malicious link, the crafted HTML page is loaded on the target user's device, and the JavaScript code executes. This, in turn, triggers the heap buffer overflow in the GPU, leading to potential heap corruption.

After successfully exploiting the heap corruption, the attacker can execute arbitrary code on the target user's device or alter its behavior. This could lead to data theft, unauthorized access, or even denial of service by crashing the system.

Mitigation and Fixes

The heap buffer overflow vulnerability in the GPU in Google Chrome on Android devices has been fixed in version 133..6943.126. Users are highly recommended to update their Google Chrome browser to the latest version, which contains the fix for this vulnerability.

Conclusion

Heap buffer overflow vulnerabilities, like the one discovered in GPU in Google Chrome on Android devices (CVE-2025-1426), pose serious security threats. Attackers can potentially exploit such vulnerabilities to gain unauthorized access or inflict damage on the user's device. It's crucial to keep your software and operating systems up-to-date, and always be cautious when clicking on links from unknown sources.

Timeline

Published on: 02/19/2025 17:15:15 UTC
Last modified on: 02/19/2025 20:15:36 UTC