CVE-2024-0741: Out of Bounds Write in ANGLE Results in Memory Corruption and Potentially Exploitable Crash - What You Need to Know & Remediations

In this post, we will discuss a critical security vulnerability known as CVE-2024-0741. This vulnerability exists in ANGLE, and if exploited, it could lead to corruption of memory and potentially a harmful crash. We will take a deep dive into the vulnerability, its impact on specific versions of Firefox, Firefox ESR, and Thunderbird, and how you can protect your systems from this issue.

Vulnerability Details

CVE-2024-0741 refers to an out of bounds write in the ANGLE (Almost Native Graphics Layer Engine) library, which is used by various web browsers and applications to render WebGL and other graphic content. By exploiting this vulnerability, an attacker could potentially corrupt memory and cause a crash, which may be exploitable. Specific versions of Firefox, Firefox ESR, and Thunderbird are affected by this vulnerability:

Core Issue & Exploit

The vulnerability exists due to an out of bounds memory write operation within the ANGLE library. This allows an attacker to write data to unauthorized memory locations leading to corruption and subsequent crash.

Imagine the following function is called with an array dataArray and an index dataIndex

void process_data(unsigned int *dataArray, int dataIndex)
{
   dataArray[dataIndex] = 42;
}

This code has an inherent issue: it does not check if dataIndex is within the bounds of dataArray, leading to potential out-of-bounds write. If an attacker can control the value of dataIndex, they can potentially overwrite critical memory parts, causing a crash or worse, remote code execution.

The attacker could build a malicious website containing specially crafted WebGL content to leverage this vulnerability, and once the victim visits this website, the exploit code will be executed in the browser context, compromising the victim's system.

Mozilla Security Advisory

- Firefox: MFSA2024-32
- Firefox ESR: MFSA2024-33
- Thunderbird: MFSA2024-34

2. CVE Details: CVE-2024-0741

Thunderbird: Upgrade to 115.7 or later

2. Regularly update your software and apply security patches to stay protected from new vulnerabilities.

Conclusion

In summary, CVE-2024-0741 is a critical security vulnerability that affects specific versions of Firefox, Firefox ESR, and Thunderbird. By exploiting the out-of-bounds write in ANGLE, attackers can potentially corrupt memory and cause an exploitable crash. To protect your systems, please ensure that you are using the latest version of the affected software and apply necessary security updates and configurations. Stay safer online and keep your software updated!

Timeline

Published on: 01/23/2024 14:15:38 UTC
Last modified on: 02/02/2024 17:19:30 UTC