Critical · published February 16, 2022
🚨 A sneaky encoding oversight in Expat could put your applications at risk! If a UTF-8 character isn't validated properly, it could lead to some serious chaos! 🔥 Think of it like a restaurant that serves a dish without checking if the ingredients are fresh. If you use spoiled ingredients, it could ruin the entire meal — just like invalid characters can mess up your XML parsing! Without proper encoding validation, an attacker could exploit this vulnerability to craft malicious XML input, potentially leading to crashes or unexpected behavior in your application. This could result in service disruptions, errors, or even data loss — an absolute nightmare for any developer! 💥
Think of it like a restaurant that serves a dish without checking if the ingredients are fresh. If you use spoiled ingredients, it could ruin the entire meal — just like invalid characters can mess up your XML parsing! In Expat (libexpat) versions prior to 2.4.5, the xmltok_impl.c file fails to validate UTF-8 characters in certain contexts, which can lead to unexpected parsing issues.
Without proper encoding validation, an attacker could exploit this vulnerability to craft malicious XML input, potentially leading to crashes or unexpected behavior in your application. This could result in service disruptions, errors, or even data loss — an absolute nightmare for any developer! 💥 Immediately upgrade to Expat version 2.4.5 or later to fix this critical issue. Additionally, review your XML input handling practices to ensure robust validation procedures are in place. ⚡ You've got this! By taking these steps, you can fortify your application against potential attacks and keep your systems secure! 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| libexpat_project/libexpat | < 2.4.5 | 2.4.5 |
| debian/debian_linux | all versions | — |
| debian/debian_linux | all versions | — |
| fedoraproject/fedora | all versions | — |
| fedoraproject/fedora | all versions | — |
| oracle/http_server | all versions | — |
| oracle/http_server | all versions | — |
| oracle/zfs_storage_appliance_kit | all versions | — |
| siemens/sinema_remote_connect_server | < 3.1 | 3.1 |