CVE-2021-21347 : Vulnerability Insights and Analysis

XStream is a Java library used to serialize objects to XML and back. In versions prior to 1.4.16, a vulnerability exists that could permit a remote attacker to execute arbitrary code by manipulating the processed input stream. Users are advised to configure XStream's security framework with a whitelist of minimal required types to prevent exploitation.

Understanding CVE-2021-21347

This section provides insights into the nature and impact of the vulnerability.

What is CVE-2021-21347?

The CVE-2021-21347 vulnerability in XStream allows remote attackers to execute arbitrary code by manipulating the input stream.

The Impact of CVE-2021-21347

The vulnerability poses a medium severity threat, with a CVSS base score of 6.1. It requires user interaction and can lead to a complete compromise of the affected system's integrity.

Technical Details of CVE-2021-21347

This section focuses on the technical aspects of the vulnerability.

Vulnerability Description

XStream versions prior to 1.4.16 are susceptible to an arbitrary code execution attack due to improper input stream manipulation.

Affected Systems and Versions

XStream versions below 1.4.16 are impacted by this vulnerability.

Exploitation Mechanism

Remote attackers can exploit this vulnerability by manipulating the input stream to execute arbitrary code.

Mitigation and Prevention

This section details the steps to mitigate the risks associated with CVE-2021-21347.

Immediate Steps to Take

Users are advised to update XStream to version 1.4.16 or newer to prevent exploitation of this vulnerability.

Long-Term Security Practices

Implementing strong input validation mechanisms and following secure coding practices can help prevent similar vulnerabilities.

Patching and Updates

Regularly apply security patches and updates for XStream to address known vulnerabilities and enhance the system's security.