CVE-2021-39149 : Exploit Details and Defense Strategies

XStream is a library used to serialize objects to XML and back. The vulnerability in versions prior to 1.4.18 allows remote attackers to execute arbitrary code by manipulating input streams.

Understanding CVE-2021-39149

XStream is susceptible to an arbitrary code execution attack due to a critical vulnerability in affected versions. The CVSS base score is 8.5, indicating a high severity issue.

What is CVE-2021-39149?

The vulnerability in XStream versions prior to 1.4.18 enables remote attackers to load and execute arbitrary code from a remote host with potential high impacts.

The Impact of CVE-2021-39149

The vulnerability has a high severity level impacting confidentiality, integrity, and availability. Attackers can manipulate input stream to execute arbitrary code remotely.

Technical Details of CVE-2021-39149

XStream vulnerability details and affected systems information.

Vulnerability Description

The flaw allows remote attackers to load and execute arbitrary code by manipulating the processed input stream.

Affected Systems and Versions

Product: XStream
Vendor: x-stream
Vulnerable Versions: < 1.4.18

Exploitation Mechanism

The vulnerability can be exploited remotely by manipulating the input stream, potentially leading to arbitrary code execution.

Mitigation and Prevention

Steps to mitigate the vulnerability and prevent exploitation.

Immediate Steps to Take

Upgrade XStream to version 1.4.18 or higher to mitigate the vulnerability.
Implement network controls to restrict access to XStream libraries.

Long-Term Security Practices

Regularly update software libraries and dependencies to patch known vulnerabilities.
Conduct security audits to identify and address potential security weaknesses.

Patching and Updates

Stay informed about security advisories and updates from XStream and relevant vendors.
Apply patches promptly to protect systems from known vulnerabilities.