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CVE-2021-21350 : What You Need to Know

Learn about CVE-2021-21350, a vulnerability in XStream allowing arbitrary code execution. Find mitigation steps and the impact of this security issue.

XStream, a Java library for serializing objects to XML and vice versa, was found to have a vulnerability that could allow a remote attacker to execute arbitrary code by manipulating the input stream. This CVE has a base score of 5.3 (Medium severity) according to CVSS v3.1. Users are advised to update to version 1.4.16 to mitigate this issue.

Understanding CVE-2021-21350

XStream is susceptible to an attack where an adversary can potentially execute arbitrary code by tampering with the input stream.

What is CVE-2021-21350?

CVE-2021-21350 is a vulnerability in XStream, a Java library, allowing remote attackers to execute arbitrary code by altering the processed input stream.

The Impact of CVE-2021-21350

The impact of this vulnerability is considered medium, with a base score of 5.3 according to CVSS v3.1. Attackers can exploit this to execute arbitrary code.

Technical Details of CVE-2021-21350

This section provides detailed technical information about the vulnerability.

Vulnerability Description

XStream's vulnerability allows remote attackers to execute arbitrary code by manipulating the processed input stream.

Affected Systems and Versions

Systems using XStream versions prior to 1.4.16 are vulnerable to this exploit.

Exploitation Mechanism

Attackers can exploit this vulnerability by tampering with the input stream, leading to arbitrary code execution.

Mitigation and Prevention

To address CVE-2021-21350, users should take the following mitigation steps:

Immediate Steps to Take

        Upgrade XStream to version 1.4.16 to prevent exploitation of this vulnerability.

Long-Term Security Practices

        Implement proper input validation and sanitization practices in your applications.

Patching and Updates

        Regularly check for security updates and apply patches promptly to protect against known vulnerabilities.

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