Security Exception in Checkstyle: Vulnerability in JavaLanguageParser
Summary
OSV-2025-926: Security exception in com.puppycrawl.tools.checkstyle.grammar.java.JavaLanguageParser.statement. Affects checkstyle versions >= 1a5b7408224c867849fc3d6f7d0219bd1e837533, < 7f845bd23e043986aff9b4508a601298c1842202. Fixed in 7f845bd23e043986aff9b4508a601298c1842202. How to fix ↓
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Background
Checkstyle is a development tool used to help programmers write Java code that adheres to a coding standard. It automates the process of checking Java code for adherence to a set of coding rules, which helps improve code quality and maintainability. This tool is widely used in Java projects to enforce coding standards and improve code readability. However, a security exception vulnerability has been identified in the JavaLanguageParser component, which could potentially lead to crashes during code analysis.
Vulnerability Detail
The vulnerability originates from a security exception in the method 'statement' of the 'JavaLanguageParser' class within the Checkstyle package. This issue was reported through OSS-Fuzz, indicating that the crash occurs due to improper handling of certain inputs, leading to potential application instability. The specific crash state involves calls to 'Unsafe.weakCompareAndSetInt' and 'Unsafe.getAndAddInt', which are low-level operations that can cause security issues if not managed correctly. The ramifications of this vulnerability include application crashes and potential denial of service, affecting the reliability of the Checkstyle tool.
How To Fix
Minimum fixed version
7f845bd23e043986aff9b4508a601298c1842202
This is the first release that contains the fix.
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Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. It is advisable to update to the patched version as soon as possible to avoid potential crashes.
Conclusion
In summary, a security exception vulnerability has been identified in the Checkstyle package, specifically within the JavaLanguageParser. It is essential to update to the patched version to ensure the stability and security of your Java applications. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
See every vulnerability recorded for checkstyle →
FAQ
The vulnerability is a security exception in the JavaLanguageParser, which can lead to application crashes.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
While there are no specific workarounds, it is crucial to plan for an update to the patched version to mitigate risks.
The primary impact is application instability, which can lead to crashes and denial of service during code analysis.
You can find more information about Checkstyle on its official GitHub repository at https://github.com/checkstyle/checkstyle.
References
Related vulnerabilities
Recent vulnerabilities recorded for checkstyle.
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