CVE-2021-35559 : Exploit Details and Defense Strategies

This article provides insights into CVE-2021-35559, a vulnerability affecting Java SE JDK and JRE products by Oracle Corporation.

Understanding CVE-2021-35559

CVE-2021-35559 is a vulnerability in Java SE and Oracle GraalVM Enterprise Edition that allows for unauthorized access and partial denial of service attacks.

What is CVE-2021-35559?

The vulnerability in CVE-2021-35559 impacts Java SE JDK and JRE products, specifically versions 7u311, 8u301, 11.0.12, 17, Oracle GraalVM Enterprise Edition 20.3.3, and 21.2.0. It enables unauthenticated attackers with network access to compromise affected systems, potentially leading to partial denial of service.

The Impact of CVE-2021-35559

Successful exploitation of CVE-2021-35559 can result in unauthorized access and the ability to cause partial denial of service for Java SE and Oracle GraalVM Enterprise Edition. This vulnerability can be leveraged by untrusted code and APIs to bypass security measures.

Technical Details of CVE-2021-35559

CVE-2021-35559 is rated with a CVSS 3.1 base score of 5.3, indicating medium severity. The attack complexity is low, and the vulnerability can be exploited via network access.

Vulnerability Description

The vulnerability allows unauthenticated attackers to compromise Java SE and GraalVM Enterprise Edition, potentially leading to unauthorized access and partial denial of service.

Affected Systems and Versions

Java SE versions 7u311, 8u301, 11.0.12, 17, as well as GraalVM Enterprise Edition 20.3.3 and 21.2.0 are vulnerable to CVE-2021-35559.

Exploitation Mechanism

Attackers can exploit this vulnerability via multiple protocols by accessing the network, potentially causing partial denial of service and unauthorized access.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-35559, immediate action must be taken to secure affected systems and prevent potential unauthorized access.

Immediate Steps to Take

Organizations should apply security patches and updates provided by Oracle to address the vulnerability promptly.

Long-Term Security Practices

Implementing strict security measures, regularly updating software, and monitoring network activity are essential for maintaining system integrity and preventing future exploits.

Patching and Updates

Regularly check for security advisories from Oracle and apply patches as soon as they are released to ensure systems are protected from known vulnerabilities.