CVE-2013-1348: Symphony Vulnerable to PHP Code Injection via YAML Parsing
Summary
CVE-2013-1348: Symphony Vulnerable to PHP Code Injection via YAML Parsing. Affects symfony/symfony versions >= 2.0.0, < 2.0.22. Fixed in 2.0.22. How to fix ↓
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Background
Symphony is a popular PHP framework used for developing web applications. It provides a set of reusable components and tools that simplify the development process. One of the components used in Symphony is the YAML parser, which allows developers to parse YAML files and convert them into PHP objects. However, a vulnerability in the YAML parser in Symphony versions 2.0.x before 2.0.22 allows remote attackers to execute arbitrary PHP code. This vulnerability is different from CVE-2013-1397.
Vulnerability Detail
The vulnerability in Symphony arises from the Yaml::parse function, which is used to parse YAML files. Attackers can exploit this vulnerability by providing a specially crafted YAML file that contains malicious PHP code. When the YAML file is parsed, the PHP code is executed, leading to arbitrary code execution on the server. This can result in various consequences, including unauthorized access, data leakage, and server compromise.
How To Fix
Minimum fixed version
2.0.22
This is the first release that contains the fix.
composer require symfony/symfony:2.0.22Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If upgrading Symphony is not immediately feasible, a temporary workaround is to disable the use of the YAML parser in the affected application. This can be done by modifying the application code to use an alternative parser or by implementing input validation and sanitization to prevent the execution of arbitrary PHP code.
Conclusion
The vulnerability in Symphony's YAML parsing functionality can lead to the execution of arbitrary PHP code on the server. To mitigate this risk, it is crucial to upgrade Symphony to version 2.0.22 or later. Additionally, implementing input validation and sanitization can provide temporary protection. For further assistance and support in vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability allows remote attackers to execute arbitrary PHP code on the server. The impact can range from unauthorized access to sensitive data to complete server compromise.
No, only Symphony versions 2.0.x before 2.0.22 are vulnerable to this specific issue. It is recommended to upgrade to the fixed version to mitigate the vulnerability.
Yes, remote attackers can exploit this vulnerability by sending a specially crafted YAML file to the affected server.
While specific exploits may not be publicly available, the existence of this vulnerability increases the risk of successful attacks. It is important to apply the recommended fixes to mitigate the risk.
There is no specific evidence of active exploitation of this vulnerability at the moment. However, it is always recommended to apply security patches and updates as soon as they become available.
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