CVE-2020-21594 : Exploit Details and Defense Strategies

CVE-2020-21594 involves a heap buffer overflow in libde265 v1.0.4's put_epel_hv_fallback function, allowing exploitation through a crafted file.

Understanding CVE-2020-21594

What is CVE-2020-21594?

CVE-2020-21594 is a vulnerability in libde265 v1.0.4 that enables a heap buffer overflow in the put_epel_hv_fallback function, potentially leading to exploitation via a specially crafted file.

The Impact of CVE-2020-21594

This vulnerability can be exploited by attackers to execute arbitrary code or cause a denial of service (DoS) condition on systems running the affected version of libde265.

Technical Details of CVE-2020-21594

Vulnerability Description

The vulnerability exists in the put_epel_hv_fallback function of libde265 v1.0.4, allowing attackers to trigger a heap buffer overflow by manipulating a specific file.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers can exploit this vulnerability by creating a malicious file that triggers the heap buffer overflow in the put_epel_hv_fallback function of libde265 v1.0.4.

Mitigation and Prevention

Immediate Steps to Take

Apply vendor patches or updates as soon as they are available.
Implement proper input validation to prevent crafted files from triggering the vulnerability.

Long-Term Security Practices

Regularly update software and libraries to the latest versions.
Conduct security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

It is crucial to apply patches or updates provided by the vendor to mitigate the CVE-2020-21594 vulnerability and enhance the security of the affected systems.