CVE-2018-20455 : What You Need to Know

Before version 3.1.1 of radare2, a stack-based buffer overflow vulnerability exists that could lead to a denial of service attack. This issue is similar to CVE-2018-20456.

Understanding CVE-2018-20455

In radare2 prior to version 3.1.1, a vulnerability in the parseOperand function within libr/asm/p/asm_x86_nz.c could be exploited by attackers to cause a denial of service through a stack-based buffer overflow.

What is CVE-2018-20455?

This CVE refers to a vulnerability in radare2 that allows attackers to trigger a denial of service (application crash) by manipulating an input file using the parseOperand function.

The Impact of CVE-2018-20455

Attackers can exploit this vulnerability to crash applications through a stack-based buffer overflow.

Technical Details of CVE-2018-20455

In-depth technical information about the vulnerability.

Vulnerability Description

The parseOperand function in radare2's libr/asm/p/asm_x86_nz.c can be abused to trigger a denial of service attack via a stack-based buffer overflow.

Affected Systems and Versions

Versions before 3.1.1 of radare2 are vulnerable to this issue.

Exploitation Mechanism

Attackers can craft a malicious input file to exploit the parseOperand function and cause a denial of service.

Mitigation and Prevention

Steps to address and prevent the CVE-2018-20455 vulnerability.

Immediate Steps to Take

Update radare2 to version 3.1.1 or newer to mitigate the vulnerability.
Regularly monitor for security advisories and patches from the radare2 project.

Long-Term Security Practices

Implement input validation mechanisms to prevent buffer overflow attacks.
Conduct regular security audits and code reviews to identify and address vulnerabilities.

Patching and Updates

Apply patches and updates provided by radare2 to fix the vulnerability and enhance system security.