CVE-2021-44921 Explained : Impact and Mitigation

A null pointer dereference vulnerability in the gf_isom_parse_movie_boxes_internal function of gpac 1.1.0 can lead to a segmentation fault and application crash.

Understanding CVE-2021-44921

This CVE involves a null pointer dereference vulnerability in the specified function of gpac 1.1.0.

What is CVE-2021-44921?

It is a vulnerability in the gf_isom_parse_movie_boxes_internal function of gpac 1.1.0, allowing an attacker to cause a segmentation fault and crash the application.

The Impact of CVE-2021-44921

The vulnerability could be exploited to crash applications using gpac 1.1.0, leading to denial of service and potential interruption of services.

Technical Details of CVE-2021-44921

The technical aspects of this vulnerability are crucial for understanding its implications.

Vulnerability Description

The null pointer dereference vulnerability in gpac 1.1.0 occurs in the gf_isom_parse_movie_boxes_internal function, triggering a segmentation fault and application crash.

Affected Systems and Versions

Affected Version: gpac 1.1.0

Exploitation Mechanism

The vulnerability can be exploited by specially crafted inputs to trigger the null pointer dereference, potentially leading to a crash.

Mitigation and Prevention

Taking immediate steps to address and prevent the exploitation of CVE-2021-44921 is crucial.

Immediate Steps to Take

Update gpac to a patched version or apply vendor-supplied fixes.
Avoid opening untrusted media files with the vulnerable version.

Long-Term Security Practices

Regularly update software and apply security patches.
Conduct security assessments and code reviews to identify and remediate vulnerabilities.

Patching and Updates

Monitor official sources for patches and updates to ensure timely mitigation of known vulnerabilities.