CVE-2020-27795 : What You Need to Know

A segmentation fault vulnerability was discovered in radare2 with the adf command, potentially leading to a denial of service.

Understanding CVE-2020-27795

This CVE involves a vulnerability in radare2 that could be exploited to cause a segmentation fault.

What is CVE-2020-27795?

The vulnerability in radare2's adf command could allow an attacker to trigger a segmentation fault by providing incorrect arguments, leading to a denial of service.

The Impact of CVE-2020-27795

The exploitation of this vulnerability could result in a denial of service condition, impacting the availability of the affected system.

Technical Details of CVE-2020-27795

This section provides technical details of the CVE.

Vulnerability Description

The issue occurs in radare2's cmd_anal.c file when the "adf" command receives incorrect arguments, leading to a null pointer dereference and subsequent segmentation fault.

Affected Systems and Versions

Product: radare2
Versions affected: Fixed in v4.4.0

Exploitation Mechanism

By providing incorrect or no arguments to the "adf" command in radare2, an attacker can trigger a segmentation fault, potentially causing a denial of service.

Mitigation and Prevention

Protecting systems from CVE-2020-27795 is crucial to prevent potential attacks.

Immediate Steps to Take

Update radare2 to version 4.4.0 or later to mitigate the vulnerability.
Avoid running radare2 with untrusted input to reduce the risk of exploitation.

Long-Term Security Practices

Regularly update software and apply patches to address known vulnerabilities.
Implement proper input validation mechanisms to prevent malformed input from causing issues.

Patching and Updates

Ensure timely patching and updates for radare2 to address security vulnerabilities and enhance system security.