High · published December 28, 2025
⚠️ A tiny oversight in the getimagesize() function could leak sensitive information from memory! This bug affects various PHP versions, so let’s dive in! 🔍 Think of it like a restaurant kitchen where a chef accidentally leaves some ingredients out on the counter while preparing a dish. If a nosy diner could reach over and grab those ingredients, they might discover something they shouldn't — just like an attacker might extract sensitive data from this uninitialized memory! 🍽️ This vulnerability may allow attackers to peek into sensitive heap data, potentially exposing critical information that should be tightly secured. It's not catastrophic, but it definitely raises eyebrows and could undermine the confidentiality of your server. If left unattended, it could turn into a bigger problem down the line!
Think of it like a restaurant kitchen where a chef accidentally leaves some ingredients out on the counter while preparing a dish. If a nosy diner could reach over and grab those ingredients, they might discover something they shouldn't — just like an attacker might extract sensitive data from this uninitialized memory! 🍽️ The flaw exists in PHP's getimagesize() function, where uninitialized heap memory can be inadvertently disclosed due to a mismanaged buffer in the php_read_stream_all_chunks() function. This mishandling allows sensitive data to leak when reading images in multi-chunk mode.
This vulnerability may allow attackers to peek into sensitive heap data, potentially exposing critical information that should be tightly secured. It's not catastrophic, but it definitely raises eyebrows and could undermine the confidentiality of your server. If left unattended, it could turn into a bigger problem down the line! To protect your applications, upgrade PHP to version 8.1.34, 8.2.30, 8.3.29, 8.4.16, or 8.5.1, depending on your installed version. Always ensure to test your applications after the upgrade for any unexpected behaviors. Regular audits can also help in identifying and mitigating such issues in the future! You've got this! With these updates, you'll keep your server secure and running smoothly! 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| php/php | ≥ 8.1.0, < 8.1.34 | 8.1.34 |
| php/php | ≥ 8.2.0, < 8.2.30 | 8.2.30 |
| php/php | ≥ 8.3.0, < 8.3.29 | 8.3.29 |
| php/php | ≥ 8.4.0, < 8.4.16 | 8.4.16 |
| php/php | all versions | — |