Critical Vulnerability in libjson-java: Unbalanced Comment String Handling
Summary
DEBIAN-CVE-2024-47855: util/JSONTokener.java in JSON-lib before 3.1.0 mishandles an unbalanced comment string. Affects libjson-java versions < 3.1.0+dfsg-1. Fixed in 3.1.0+dfsg-1. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
libjson-java is a Java library that provides functionality for parsing and generating JSON data. It is widely used in applications that require data interchange in a lightweight format. The library is designed to facilitate easy manipulation of JSON objects and arrays. However, a vulnerability has been identified in versions prior to 3.1.0, where the handling of unbalanced comment strings can lead to unexpected behavior and potential security risks.
Vulnerability Detail
The vulnerability exists in the util/JSONTokener.java file of JSON-lib versions before 3.1.0. It mishandles unbalanced comment strings, which can lead to parsing errors and potentially allow attackers to exploit the application using this library. This could result in denial of service or other unexpected behaviors in applications relying on this library for JSON processing.
How To Fix
Minimum fixed version
3.1.0+dfsg-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade libjson-javaTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, ensure that any JSON input processed by the library is sanitized and does not contain unbalanced comment strings. This can help mitigate the risk until the library is updated.
Conclusion
The libjson-java library has a critical vulnerability related to the handling of unbalanced comment strings, which can lead to significant security risks. It is crucial for users of this library to update to the patched version to mitigate these risks. Additionally, utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
See every vulnerability recorded for libjson-java →
FAQ
The vulnerability involves mishandling unbalanced comment strings in JSON data, which can lead to parsing errors and potential exploitation.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The consequences may include denial of service or unexpected behavior in applications that rely on libjson-java for JSON processing.
Yes, the vulnerability has been patched in version 3.1.0+dfsg-1 of the libjson-java package.
If an immediate update is not possible, ensure that JSON inputs are sanitized to avoid unbalanced comment strings as a temporary measure.
References
Related vulnerabilities
Recent vulnerabilities recorded for libjson-java.
