CVE-2021-39153 : Security Advisory and Response

XStream, a library to serialize objects to XML, is susceptible to arbitrary code execution due to a critical vulnerability.

Understanding CVE-2021-39153

XStream is impacted by a severe vulnerability that can be exploited by a remote attacker to execute arbitrary code.

What is CVE-2021-39153?

The vulnerability in XStream's affected versions allows remote attackers to execute arbitrary code by manipulating the input stream.

The Impact of CVE-2021-39153

The CVSS score of 8.5 categorizes this vulnerability as high severity with significant impacts on confidentiality, integrity, and availability.

Technical Details of CVE-2021-39153

XStream's vulnerability details and affected systems are critical to understanding the potential risks.

Vulnerability Description

The flaw allows remote attackers to execute code by manipulating the input stream in certain versions of XStream.

Affected Systems and Versions

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

Exploitation Mechanism

Attack Complexity: High
Attack Vector: Network
Impact: High impact on confidentiality, integrity, and availability
Privileges Required: Low
Scope: Changed
Vector String: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Mitigation and Prevention

Taking immediate steps and implementing long-term security practices are essential to mitigate the risks associated with CVE-2021-39153.

Immediate Steps to Take

Update XStream to version 1.4.18 or above to eliminate the vulnerability.
Implement network controls to restrict access to the vulnerable component.

Long-Term Security Practices

Regularly monitor and patch software components for known vulnerabilities.
Conduct security training to educate developers on secure coding practices.
Implement a robust security framework to prevent arbitrary code execution.

Patching and Updates

Stay informed about security advisories and apply patches promptly to strengthen the overall security posture.