Use-after-free vulnerability in php5
Summary
DSA-3198-1: php5 - security update. Affects php5 versions < 5.4.39-0+deb7u1. Fixed in 5.4.39-0+deb7u1. How to fix ↓
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Background
php5 is a popular programming language used for web development. It provides a wide range of features and functionalities for creating dynamic websites and applications. However, a vulnerability has been discovered in the phar extension of php5, which can lead to a use-after-free condition. This vulnerability can be exploited by an attacker to execute arbitrary code or cause a denial of service.
Vulnerability Detail
The use-after-free vulnerability in the phar extension of php5 allows an attacker to manipulate memory that has already been freed. By carefully crafting a malicious phar archive, an attacker can trigger this vulnerability and potentially execute arbitrary code or crash the application. This can lead to a complete compromise of the affected system or disruption of services.
How To Fix
Minimum fixed version
5.4.39-0+deb7u1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade php5Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is essential to apply the provided fix by upgrading to the patched version of php5.
Conclusion
The use-after-free vulnerability in the phar extension of php5 can have severe consequences, including the execution of arbitrary code and denial of service. It is highly recommended to upgrade to version 5.4.39-0+deb7u1 of php5 to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for php5 →
FAQ
A use-after-free vulnerability occurs when a program continues to use memory after it has been freed. This can lead to memory corruption and potentially allow an attacker to execute arbitrary code or crash the application.
An attacker can exploit this vulnerability by crafting a malicious phar archive and tricking a user or system into opening it. When the phar archive is processed, the use-after-free vulnerability can be triggered, allowing the attacker to execute arbitrary code or crash the application.
The potential consequences of this vulnerability include the execution of arbitrary code by an attacker, leading to a complete compromise of the affected system. It can also result in a denial of service, causing disruption to services and impacting the availability of the application or website.
Yes, a fix is available for this vulnerability. Users are advised to upgrade their php5 packages to version 5.4.39-0+deb7u1, which includes a patch that addresses the use-after-free vulnerability in the phar extension.
No, there are no known workarounds for this vulnerability. It is crucial to apply the provided fix by upgrading to the patched version of php5.
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