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CVE-2020-21603 : Security Advisory and Response

Learn about CVE-2020-21603, a heap buffer overflow vulnerability in libde265 v1.0.4 that could allow attackers to execute arbitrary code. Find mitigation steps and preventive measures here.

CVE-2020-21603 is a vulnerability found in libde265 v1.0.4, involving a heap buffer overflow that can be exploited through a crafted file.

Understanding CVE-2020-21603

What is CVE-2020-21603?

The vulnerability in libde265 v1.0.4 allows attackers to trigger a heap buffer overflow by manipulating a specific file, potentially leading to arbitrary code execution or denial of service.

The Impact of CVE-2020-21603

This vulnerability could result in a security breach, enabling malicious actors to compromise systems running the affected version of libde265 and execute unauthorized commands.

Technical Details of CVE-2020-21603

Vulnerability Description

The vulnerability lies in the put_qpel_0_0_fallback_16 function of libde265 v1.0.4, where a heap buffer overflow occurs due to improper handling of crafted files.

Affected Systems and Versions

        Vendor: n/a
        Product: n/a
        Versions Affected: All versions of libde265 v1.0.4 are susceptible to this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by creating a specially crafted file that triggers the heap buffer overflow in the put_qpel_0_0_fallback_16 function, potentially leading to malicious code execution.

Mitigation and Prevention

Immediate Steps to Take

        Update libde265 to a patched version that addresses the heap buffer overflow vulnerability.
        Avoid opening files from untrusted or unknown sources to mitigate the risk of exploitation.

Long-Term Security Practices

        Regularly monitor security advisories and updates from the libde265 project to stay informed about potential vulnerabilities.
        Implement robust file validation mechanisms to detect and block malicious files that could exploit similar vulnerabilities.

Patching and Updates

It is crucial to apply patches provided by the libde265 project promptly to ensure that systems are protected against known vulnerabilities.

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