DSA-3074-2: php5 - regression update
Summary
DSA-3074-2: php5 - regression update. Affects php5 versions < 5.4.35-0+deb7u2. Fixed in 5.4.35-0+deb7u2. How to fix ↓
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Background
PHP is a general-purpose scripting language commonly used for web development. It is embedded in various applications and frameworks to provide dynamic content generation. The php5 package is specifically designed for Debian 7 (Wheezy) and includes the PHP interpreter along with additional modules and libraries. This vulnerability affects the file utility, which is embedded in PHP and is responsible for checking ELF files. ELF (Executable and Linkable Format) is a common binary format used for executables, shared libraries, and object files in Unix-like systems. The vulnerability allows attackers to cause a denial of service by supplying a specially crafted ELF file, leading to an out-of-bounds read and application crash.
Vulnerability Detail
The vulnerability in the php5 package arises from incorrect checking of note headers in ELF files. By exploiting this flaw, an attacker can supply a specially crafted ELF file that triggers an out-of-bounds read, resulting in a denial of service and application crash. This vulnerability can potentially be exploited remotely, allowing an attacker to disrupt the functionality of systems running the affected version of php5. It is important to note that this vulnerability does not allow arbitrary code execution or privilege escalation.
How To Fix
Minimum fixed version
5.4.35-0+deb7u2
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 specific workaround mentioned for this vulnerability. However, as a general best practice, it is recommended to follow secure coding practices and avoid processing untrusted or malicious files. Additionally, implementing proper input validation and sanitization can help mitigate the risk of similar vulnerabilities.
Conclusion
The php5 package in Debian 7 (Wheezy) is vulnerable to a denial of service issue caused by incorrect checking of ELF file headers. Upgrading to version 5.4.35-0+deb7u1 or later resolves this vulnerability by addressing the issue in the PHP interpreter. It is important to promptly apply the necessary updates to ensure the security and stability of systems running the php5 package. For further support and assistance in vulnerability remediation, you can contact DevNack.com.
See every vulnerability recorded for php5 →
FAQ
The vulnerability allows attackers to cause a denial of service by supplying a specially crafted ELF file, leading to an out-of-bounds read and application crash. This can disrupt the functionality of systems running the affected version of php5.
Yes, this vulnerability can be exploited remotely by an attacker who can supply a specially crafted ELF file to the affected system.
No, this vulnerability does not allow arbitrary code execution or privilege escalation. It only leads to a denial of service by causing an out-of-bounds read and application crash.
There is no specific information provided about known exploits for this vulnerability. However, it is always advisable to apply security patches and updates promptly to mitigate the risk of exploitation.
If you are using the php5 package on Debian 7 (Wheezy), it is recommended to upgrade to version 5.4.35-0+deb7u1 or later. Follow the official documentation and guidelines provided by Debian for package upgrades.
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