Critical · published January 10, 2022
🔥 An integer overflow in Expat could turn your XML parsing into a ticking time bomb! Imagine a factory assembly line that miscalculates the number of parts it can handle, causing an overflow of materials and chaos. That's what this vulnerability does to your data, potentially leading to system crashes and unexpected behavior. If exploited, an attacker could cause crashes or even execute arbitrary code, leading to severe system failures. This means sensitive data could be at risk, and the stability of your applications could hang in the balance — absolutely devastating!
Imagine a factory assembly line that miscalculates the number of parts it can handle, causing an overflow of materials and chaos. That's what this vulnerability does to your data, potentially leading to system crashes and unexpected behavior. The flaw arises in the defineAttribute function within xmlparse.c in Expat versions prior to 2.4.3, where an integer overflow can occur during XML parsing operations, leading to memory corruption.
If exploited, an attacker could cause crashes or even execute arbitrary code, leading to severe system failures. This means sensitive data could be at risk, and the stability of your applications could hang in the balance — absolutely devastating! Patch your Expat library to version 2.4.3 or later immediately to close this critical vulnerability. It's essential to also review your XML processing logic to ensure it doesn't expose your applications to similar risks in the future. You've got this! By taking these steps, you can secure your application and keep the internet safe! 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| libexpat_project/libexpat | < 2.4.3 | 2.4.3 |
| tenable/nessus | < 8.15.3 | 8.15.3 |
| tenable/nessus | ≥ 10.0.0, < 10.1.1 | 10.1.1 |
| debian/debian_linux | all versions | — |
| debian/debian_linux | all versions | — |
| siemens/sinema_remote_connect_server | < 3.1 | 3.1 |