CVE-2020-21606 Explained : Impact and Mitigation

CVE-2020-21606 involves a heap buffer overflow vulnerability in libde265 v1.0.4, specifically in the put_epel_16_fallback function. This flaw can be exploited by a malicious actor through a specially crafted file.

Understanding CVE-2020-21606

This CVE entry highlights a critical security issue in the libde265 library.

What is CVE-2020-21606?

CVE-2020-21606 is a heap buffer overflow vulnerability found in libde265 v1.0.4, allowing attackers to execute arbitrary code or crash the application.

The Impact of CVE-2020-21606

The vulnerability can lead to remote code execution, denial of service, or potential information disclosure, posing a significant risk to systems utilizing the affected library.

Technical Details of CVE-2020-21606

This section delves into the specifics of the vulnerability.

Vulnerability Description

The flaw exists in the put_epel_16_fallback function of libde265 v1.0.4, enabling attackers to trigger a heap buffer overflow by manipulating a file.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions: All versions are affected.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a malicious file that triggers the heap buffer overflow in the put_epel_16_fallback function.

Mitigation and Prevention

Protecting systems from CVE-2020-21606 requires immediate action and long-term security measures.

Immediate Steps to Take

Apply vendor patches or updates promptly.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Conduct regular security assessments and audits.
Educate users on safe file handling practices.
Keep software and libraries up to date to prevent known vulnerabilities.
Employ intrusion detection and prevention systems.

Patching and Updates

Ensure that the affected library, libde265, is updated to a patched version that addresses the heap buffer overflow vulnerability.