CVE-2021-35564 : Exploit Details and Defense Strategies

A vulnerability in the Java SE and Oracle GraalVM Enterprise Edition products allows an unauthenticated attacker to compromise the systems. Here's a detailed analysis of CVE-2021-35564.

Understanding CVE-2021-35564

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

What is CVE-2021-35564?

The vulnerability affects Java SE JDK and JRE products by Oracle Corporation, specifically versions 7u311, 8u301, 11.0.12, and 17, as well as Oracle GraalVM Enterprise Edition versions 20.3.3 and 21.2.0. It allows an attacker with network access to compromise Java deployments, potentially leading to unauthorized access to sensitive data.

The Impact of CVE-2021-35564

Successful exploitation of this vulnerability could result in unauthorized updates, inserts, or deletes within the affected Java SE and Oracle GraalVM Enterprise Edition instances. It poses a risk to systems relying on sandboxed Java Web Start applications or Java applets.

Technical Details of CVE-2021-35564

This section outlines the specific technical details related to the CVE-2021-35564 vulnerability.

Vulnerability Description

The vulnerability arises from a component within Java SE and Oracle GraalVM, allowing unauthenticated attackers to compromise systems with network access. It has a CVSS 3.1 Base Score of 5.3, with integrity impacts being the main concern.

Affected Systems and Versions

Systems running Java SE versions 7u311, 8u301, 11.0.12, and 17, as well as Oracle GraalVM Enterprise Edition versions 20.3.3 and 21.2.0, are vulnerable to CVE-2021-35564.

Exploitation Mechanism

The vulnerability can be exploited by unauthenticated attackers leveraging network access through various protocols to compromise Java deployments and gain unauthorized access to critical data.

Mitigation and Prevention

To protect systems from CVE-2021-35564, certain mitigation strategies need to be implemented.

Immediate Steps to Take

It is recommended to apply security patches provided by Oracle for the affected versions. Additionally, restrict network access to critical systems hosting Java deployments.

Long-Term Security Practices

Ensure regular security updates and monitoring practices for Java SE and Oracle GraalVM Enterprise Edition instances. Educate users on the risks associated with executing untrusted code.

Patching and Updates

Stay updated on security advisories from Oracle and relevant vendors to apply patches promptly and minimize exposure to potential threats.