CVE-2021-39151 (High) Detected In Xstream-1.4.5.jar

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CVE-2021-39151 (High) Detected in xstream-1.4.5.jar: A Critical Vulnerability in Java Serialization Library

Introduction

In the world of software development, security vulnerabilities can have devastating consequences. One such vulnerability, CVE-2021-39151, has been detected in the xstream-1.4.5.jar library, a popular Java serialization library. In this article, we will delve into the details of this high-severity vulnerability, its impact, and the suggested fix.

CVE-2021-39151: A High-Severity Vulnerability

CVE-2021-39151 is a high-severity vulnerability in the xstream library, which allows a remote attacker to load and execute arbitrary code from a remote host by manipulating the processed input stream. This vulnerability is particularly concerning as it can be exploited without any user interaction, making it a significant threat to software security.

XStream: A Serialization Library for Java

XStream is a simple library that enables the serialization of Java objects to XML and back again. It is widely used in various applications, including web services, desktop applications, and mobile apps. However, the vulnerability in xstream-1.4.5.jar highlights the importance of ensuring the security of serialization libraries.

Vulnerability Details

The vulnerability, CVE-2021-39151, was discovered on August 23, 2021. It affects versions of xstream prior to 1.4.18. The vulnerability can be exploited by manipulating the processed input stream, allowing a remote attacker to execute arbitrary code.

Publish Date: August 23, 2021 URL: https://www.mend.io/vulnerability-database/CVE-2021-39151

CVSS 3 Score Details

The CVSS 3 score for CVE-2021-39151 is 8.5, indicating a high severity vulnerability. The CVSS 3 score is calculated based on several metrics, including:

  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Changed
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High

Suggested Fix

The suggested fix for CVE-2021-39151 is to upgrade the xstream library to version 1.4.18 or later. This fix was released on August 23, 2021, and is available on the xstream GitHub repository.

Type: Upgrade version Origin: https://github.com/x-stream/xstream/security/advisories/GHSA-hph2-m3g5-xxv4 Release Date: August 23, 2021 Fix Resolution: 1.4.18

Conclusion

CVE-2021-39151 is a high-severity vulnerability in the xstream-1.4.5.jar library, which can be exploited by remote attackers to execute arbitrary code. The suggested fix is to upgrade the xstream library to version 1.4.18 or later. It is essential to ensure the security of serialization libraries, such as xstream, to prevent such vulnerabilities from affecting software applications.

Recommendations

To prevent similar vulnerabilities in the future, we recommend:

  • Regularly updating dependencies, including serialization libraries like xstream
  • Implementing a security framework with a whitelist limited to the minimal required types
  • Monitoring software applications for potential vulnerabilities
  • Conducting regular security audits and penetration testing

By following these recommendations, developers and organizations can ensure the security and integrity of their software applications.
CVE-2021-39151 (High) Detected in xstream-1.4.5.jar: A Critical Vulnerability in Java Serialization Library - Q&A

Introduction

In our previous article, we discussed the high-severity vulnerability, CVE-2021-39151, detected in the xstream-1.4.5.jar library. This vulnerability allows a remote attacker to load and execute arbitrary code from a remote host by manipulating the processed input stream. In this Q&A article, we will address some of the most frequently asked questions about this vulnerability.

Q1: What is CVE-2021-39151?

A1: CVE-2021-39151 is a high-severity vulnerability in the xstream-1.4.5.jar library, which allows a remote attacker to load and execute arbitrary code from a remote host by manipulating the processed input stream.

Q2: What is the impact of CVE-2021-39151?

A2: The impact of CVE-2021-39151 is significant, as it can be exploited by remote attackers to execute arbitrary code. This can lead to unauthorized access, data breaches, and other security threats.

Q3: What is the CVSS 3 score for CVE-2021-39151?

A3: The CVSS 3 score for CVE-2021-39151 is 8.5, indicating a high severity vulnerability.

Q4: What is the suggested fix for CVE-2021-39151?

A4: The suggested fix for CVE-2021-39151 is to upgrade the xstream library to version 1.4.18 or later.

Q5: How can I prevent similar vulnerabilities in the future?

A5: To prevent similar vulnerabilities in the future, we recommend:

  • Regularly updating dependencies, including serialization libraries like xstream
  • Implementing a security framework with a whitelist limited to the minimal required types
  • Monitoring software applications for potential vulnerabilities
  • Conducting regular security audits and penetration testing

Q6: What are the consequences of not patching CVE-2021-39151?

A6: The consequences of not patching CVE-2021-39151 can be severe, including:

  • Unauthorized access to sensitive data
  • Data breaches
  • Security threats
  • Reputation damage
  • Financial losses

Q7: How can I verify if my application is affected by CVE-2021-39151?

A7: To verify if your application is affected by CVE-2021-39151, you can:

  • Check the xstream library version used in your application
  • Verify if the library is up-to-date
  • Use a vulnerability scanner or a security tool to detect potential vulnerabilities

Q8: What is the recommended course of action for developers and organizations?

A8: The recommended course of action for developers and organizations is to:

  • Immediately update the xstream library to version 1.4.18 or later
  • Conduct a thorough security audit and penetration testing
  • Implement a security framework with a whitelist limited to the minimal required types
  • Monitor software applications for potential vulnerabilities

Conclusion

CVE-2021-39151 is a high-severity vulnerability in the xstream-1.4.5.jar library, which can be exploited by remote attackers to execute arbitrary code. It is essential to ensure the security of serialization libraries, such as xstream, to prevent such vulnerabilities from affecting software applications. By following the recommended course of action and staying informed about potential vulnerabilities, developers and organizations can ensure the security and integrity of their software applications.