Critical Security Advisory: xstream Package Vulnerability
Summary
RHSA-2021:3956: Red Hat Security Advisory: xstream security update. Affects xstream versions < 0:1.3.1-16.el7_9. Fixed in 0:1.3.1-16.el7_9. How to fix ↓
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Background
The xstream package is a popular library used for serializing and deserializing Java objects. It is widely utilized in various applications for its ease of use and flexibility in handling XML and JSON data formats. However, recent vulnerabilities have been identified that could potentially expose applications using this library to significant security risks.
Vulnerability Detail
The xstream package has multiple vulnerabilities (CVE-2021-39139 to CVE-2021-39154) that arise from improper handling of XML input, which can lead to remote code execution, denial of service, and data exposure. These vulnerabilities stem from flaws in the way xstream processes untrusted input, allowing attackers to exploit the library in various ways. The CVSS score for this vulnerability is 8.5, indicating a high severity level that necessitates immediate attention.
How To Fix
Minimum fixed version
0:1.3.1-16.el7_9
This is the first release that contains the fix.
sudo dnf update xstreamTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, if updating the package is not immediately feasible, consider implementing input validation and sanitization to mitigate the risks associated with untrusted XML input. This can help reduce the attack surface until a proper update can be applied.
Conclusion
The xstream package has been identified with critical vulnerabilities that could severely impact applications relying on it. Immediate action is required to update to the patched version to safeguard against potential exploits. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
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FAQ
The xstream package is used for serializing and deserializing Java objects, making it easier to convert Java objects to XML or JSON formats and vice versa.
The vulnerabilities can lead to remote code execution, denial of service, and exposure of sensitive data, posing significant risks to applications using the xstream library.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
If immediate updates are not possible, implement input validation and sanitization to mitigate risks associated with untrusted XML input as a temporary workaround.
More information can be found in the Red Hat Security Advisory RHSA-2021:3956, which details the vulnerabilities and their implications.
Related vulnerabilities
Recent vulnerabilities recorded for xstream.
