CVE-2012-2965: Caucho Resin Vulnerability in Variable Name Handling
Summary
CVE-2012-2965: Caucho Quercus, as distributed in Resin before 4.0.29, does not properly handle unspecified characters in the names of variables, which has unknown impact and remote attack vectors, related to an "HTTP Parameter Contamin... Affects com.caucho:resin versions < 4.0.29. Fixed in 4.0.29. How to fix ↓
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Background
Caucho Resin is an open-source application server for Java that provides a robust platform for building and deploying web applications. It includes the Quercus engine, which allows PHP applications to run on the Java platform. The server is known for its performance and scalability, making it a popular choice for developers. However, versions prior to 4.0.29 have a vulnerability related to improper handling of unspecified characters in variable names, which can lead to security issues.
Vulnerability Detail
The vulnerability identified as CVE-2012-2965 arises from Caucho Quercus's failure to properly handle unspecified characters in variable names. This oversight can lead to HTTP Parameter Contamination, where an attacker may exploit this flaw to manipulate application behavior or gain unauthorized access. The exact impact of this vulnerability is not fully defined, but it poses significant risks, especially in environments where user input is processed without adequate validation.
How To Fix
Minimum fixed version
4.0.29
This is the first release that contains the fix.
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Workaround
As a temporary measure, you can implement input validation to sanitize variable names and prevent the inclusion of unspecified characters. This can help mitigate the risk until the package is updated. For example, you can use a regular expression to validate input:
String sanitizedInput =
userInput.replaceAll("[^a-zA-Z0-9_]", "");
Conclusion
CVE-2012-2965 presents a significant security risk in Caucho Resin versions prior to 4.0.29 due to improper handling of variable names. It is crucial to update to the patched version and implement input validation to secure your application against potential attacks.
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FAQ
CVE-2012-2965 is a vulnerability in Caucho Quercus, part of the Caucho Resin application server, which improperly handles unspecified characters in variable names.
The risks include potential HTTP Parameter Contamination, which could allow attackers to manipulate application behavior or gain unauthorized access.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without needing to sign up.
Update your Caucho Resin package to version 4.0.29 or later. Additionally, implement input validation to sanitize variable names.
Yes, you can implement input validation to sanitize variable names as a temporary workaround until the package is updated.
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