CVE-2021-43521 Explained : Impact and Mitigation

A Buffer Overflow vulnerability exists in zlog 1.2.15 via zlog_conf_build_with_file in src/zlog/src/conf.c.

Understanding CVE-2021-43521

This CVE-2021-43521 involves a Buffer Overflow vulnerability in zlog 1.2.15, specifically through zlog_conf_build_with_file in src/zlog/src/conf.c.

What is CVE-2021-43521?

A Buffer Overflow vulnerability allows an attacker to overwrite the buffer's boundary and potentially inject malicious code or manipulate data.

The Impact of CVE-2021-43521

This vulnerability could be exploited by remote attackers to execute arbitrary code or cause a denial of service (DoS) condition, potentially leading to a compromise of the system.

Technical Details of CVE-2021-43521

This section delves into the technical aspects of CVE-2021-43521.

Vulnerability Description

The vulnerability resides in zlog 1.2.15, particularly in the zlog_conf_build_with_file function in src/zlog/src/conf.c, allowing potential buffer overflow attacks.

Affected Systems and Versions

Affected Version: zlog 1.2.15
All systems utilizing this specific version are susceptible to exploitation.

Exploitation Mechanism

Attackers can craft specially designed input to trigger buffer overflow, leading to unauthorized access, privilege escalation, or system crashes.

Mitigation and Prevention

To address CVE-2021-43521, follow these mitigation strategies.

Immediate Steps to Take

Update zlog to the latest version to patch the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly conduct security audits and code reviews.
Implement input validation to control the content and size of data inputs.

Patching and Updates

Stay informed about security advisories and promptly apply patches to all vulnerable systems.