CVE-2021-20294 : Exploit Details and Defense Strategies

A flaw was found in binutils readelf 2.35 program that could lead to a stack buffer overflow and out-of-bounds write. This could be exploited by convincing a victim to read a crafted file, impacting confidentiality, integrity, and availability.

Understanding CVE-2021-20294

This CVE identifies a vulnerability in binutils readelf 2.35 program that could be exploited by an attacker to trigger a stack buffer overflow.

What is CVE-2021-20294?

CVE-2021-20294 is a vulnerability in binutils readelf 2.35 program that allows an attacker to perform an out-of-bounds write by convincing a victim to read a specially crafted file.

The Impact of CVE-2021-20294

The highest impact of this flaw is on the confidentiality, integrity, and availability of the affected system.

Technical Details of CVE-2021-20294

This section provides more detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability in binutils readelf 2.35 program allows for a stack buffer overflow and out-of-bounds write.

Affected Systems and Versions

The affected product is binutils version 2.35.2.

Exploitation Mechanism

An attacker can exploit this vulnerability by persuading a victim to read a specially crafted file.

Mitigation and Prevention

Here are the steps you can take to mitigate and prevent exploitation of CVE-2021-20294.

Immediate Steps to Take

Immediately update binutils to a non-vulnerable version and avoid opening untrusted files.

Long-Term Security Practices

Implement secure coding practices, conduct regular security audits, and educate users about safe file handling.

Patching and Updates

Apply patches provided by the vendor and stay informed about security updates for binutils.