CVE-2021-39553 : Security Advisory and Response

This CVE-2021-39553 article provides details about a vulnerability found in swftools that could lead to Denial of Service.

Understanding CVE-2021-39553

CVE-2021-39553 is a vulnerability identified in swftools, specifically in the function grealloc() in gmem.cc, allowing an attacker to trigger a NULL pointer dereference, resulting in a Denial of Service attack.

What is CVE-2021-39553?

Discovered in swftools through 20200710
Involves a NULL pointer dereference in the grealloc() function
Enables an attacker to cause Denial of Service

The Impact of CVE-2021-39553

The vulnerability could be exploited by attackers to cause a Denial of Service, affecting the availability of the system and potentially disrupting services.

Technical Details of CVE-2021-39553

CVE-2021-39553 relates to the following technical aspects:

Vulnerability Description

Issue discovered in swftools through 20200710
NULL pointer dereference in grealloc() function

Affected Systems and Versions

Product: N/A
Vendor: N/A
Version: N/A

Exploitation Mechanism

Allows an attacker to trigger a NULL pointer dereference
Access to the grealloc() function in gmem.cc

Mitigation and Prevention

Here are steps to mitigate and prevent exploitation of CVE-2021-39553:

Immediate Steps to Take

Implement the latest security patches for swftools
Monitor for any unusual system behavior that could indicate an ongoing attack

Long-Term Security Practices

Conduct regular security assessments and audits
Keep software and systems up to date with the latest security updates

Patching and Updates

Stay informed about security advisories from swftools
Apply relevant patches promptly to address known vulnerabilities