CVE-2021-4021 Explained : Impact and Mitigation
Discover the impact of CVE-2021-4021, a vulnerability in Radare2 versions before 5.6.2, leading to uncontrolled resource consumption and DoS attacks. Learn about affected systems and mitigation steps.
A vulnerability was discovered in Radare2 versions prior to 5.6.2, 5.6.0, 5.5.4, and 5.5.2, which could result in uncontrolled resource consumption and Denial of Service (DoS) attacks when mapping a large section of zeros in an ELF64 binary for MIPS architecture.
Understanding CVE-2021-4021
This section dives into the details of CVE-2021-4021.
What is CVE-2021-4021?
The vulnerability found in Radare2 versions prior to 5.6.2, 5.6.0, 5.5.4, and 5.5.2 involves mapping a significant section filled with zeros in an ELF64 binary for MIPS architecture, leading to potential uncontrolled resource consumption and DoS.
The Impact of CVE-2021-4021
The exploitation of this vulnerability could allow malicious actors to cause a DoS condition by consuming excessive resources, affecting the availability of the system and potentially disrupting services.
Technical Details of CVE-2021-4021
This section outlines the technical aspects of CVE-2021-4021.
Vulnerability Description
The vulnerability arises due to the improper handling of a large section filled with zeros in an ELF64 binary for MIPS architecture, allowing for uncontrolled resource consumption and DoS attacks.
Affected Systems and Versions
Radare2 versions prior to 5.6.2, 5.6.0, 5.5.4, and 5.5.2 are impacted by this vulnerability, particularly when dealing with ELF64 binaries for MIPS architecture.
Exploitation Mechanism
By mapping a huge section filled with zeros in the mentioned versions of Radare2, attackers can trigger uncontrolled resource consumption, leading to a denial of service scenario.
Mitigation and Prevention
In this section, find out how to address and prevent CVE-2021-4021.
Immediate Steps to Take
Users and organizations are advised to update Radare2 to versions 5.6.2 or above to mitigate the vulnerability and enhance system security.
Long-Term Security Practices
Implementing secure coding practices, regularly updating software, and maintaining vigilance in monitoring for vulnerabilities can bolster overall security posture.
Patching and Updates
Stay informed about security patches, advisories, and updates released by Radare2 to stay protected against emerging threats.