A critical security vulnerability, CVE-2023-4722, has been discovered in the gpac/gpac GitHub repository. This vulnerability risks exploitation of an integer overflow or wraparound, affecting versions prior to 2.3-DEV of the software. In this post, we'll dive into the details of this vulnerability, provide you with code snippets to better understand the issue, links to original references, and discuss exploitation possibilities.

What is gpac/gpac?

gpac, or GPAC Project on Advanced Content, is a multimedia framework primarily focused on processing and playing back various multimedia content, including MPEG-4 and VRML/X3D. The project, which is hosted on GitHub, provides software like MP4Box, a multimedia packager, and Osmo4, a multimedia player. The vulnerability in question, CVE-2023-4722, affects the gpac repository available on GitHub.

Vulnerability Details

The CVE-2023-4722 vulnerability is a result of an integer overflow or wraparound in the code, which can lead to unexpected behavior and potential security risks when dealing with large signed or unsigned integers. In the case of gpac, this vulnerability can be exploited for unauthorized access, information disclosure, or potentially application crashes.

Here's a brief example of a problematic code snippet that may result in an integer overflow

int a = INT_MAX;
int b = 5;
int result = a + b;

In this case, adding a and b leads to an integer overflow, as the result of the addition is larger than the maximum size an int can hold.

Exploitation Possibilities

An attacker could take advantage of this vulnerability by providing manipulated input which could trigger the integer overflow or wraparound. This, in turn, could lead to a variety of scenarios, such as:

1. Denial of service: By causing the application to crash or hang as a result of the integer overflow or wraparound scenario.
2. Buffer overflow: By causing the overflow, leading to the execution of arbitrary code or unauthorized access to sensitive data.
3. Information disclosure: By exploiting the vulnerability and gaining unauthorized access to sensitive data.

In cases like these, it is crucial to identify the vulnerability and apply the appropriate security patches.

Here are some resources to better understand the CVE-2023-4722 vulnerability and its implications

1. CVE-2023-4722 – A description of the vulnerability from the CVE database.
2. gpac/gpac Repository – The GitHub project where the vulnerability was discovered.
3. GPAC Project – The official website for the GPAC project.
4. National Vulnerability Database Report – A summary of the vulnerability as described in the National Vulnerability Database.

Mitigation: Updating to 2.3-DEV

To eliminate the risks associated with the CVE-2023-4722 vulnerability, it's important to update to version 2.3-DEV or later of gpac/gpac. By doing so, you'll benefit from the necessary security patches that address this critical integer overflow or wraparound issue.

In Conclusion

The discovery of the CVE-2023-4722 vulnerability in the gpac/gpac GitHub repository highlights the importance of keeping your software up-to-date and ensuring that you're aware of any existing security vulnerabilities. Be vigilant in monitoring changes in your software, and ensure that you're applying all necessary security patches to safeguard your applications and data.

Timeline

Published on: 09/01/2023 16:15:00 UTC
Last modified on: 09/06/2023 00:15:00 UTC