CVE-2021-42204 : Exploit Details and Defense Strategies

A heap-buffer-overflow vulnerability in swftools through 20201222 allows attackers to execute arbitrary code.

Understanding CVE-2021-42204

What is CVE-2021-42204?

This CVE describes a heap-buffer-overflow issue in the function swf_GetBits() in rfxswf.c within swftools, enabling unauthorized remote code execution.

The Impact of CVE-2021-42204

Exploiting this vulnerability can lead to an attacker executing arbitrary code on the affected system, posing a significant security risk.

Technical Details of CVE-2021-42204

Vulnerability Description

The vulnerability arises from a heap-buffer-overflow in the swf_GetBits() function within swftools, potentially exploited for remote code execution.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Versions: All versions through 20201222

Exploitation Mechanism

The flaw enables malicious actors to trigger code execution through crafted input, exploiting the buffer overflow in the swf_GetBits() function.

Mitigation and Prevention

Immediate Steps to Take

Apply the latest security patches or updates from the vendor to fix the vulnerability.
Monitor and restrict network access to vulnerable systems.

Long-Term Security Practices

Regularly update software and systems to mitigate future vulnerabilities.
Implement network segmentation and access controls to limit attack surfaces.

Patching and Updates

Stay informed about security advisories and patches related to swftools.