CVE-2021-42198 : Security Advisory and Response

An issue was discovered in swftools through 20201222. A NULL pointer dereference exists in the function swf_GetBits() located in rfxswf.c, allowing an attacker to cause Denial of Service.

Understanding CVE-2021-42198

This CVE identifies a vulnerability in swftools that could lead to a Denial of Service attack.

What is CVE-2021-42198?

The issue in swftools allows an attacker to exploit a NULL pointer dereference in the swf_GetBits() function, potentially resulting in a Denial of Service.

The Impact of CVE-2021-42198

The vulnerability could be leveraged by an attacker to cause a Denial of Service, disrupting the normal operation of the affected system.

Technical Details of CVE-2021-42198

This section delves into the specifics of the vulnerability in swftools.

Vulnerability Description

A NULL pointer dereference occurs in the function swf_GetBits() within rfxswf.c of swftools, posing a risk of Denial of Service.

Affected Systems and Versions

Affected Systems: Not specified
Affected Versions: All versions of swftools through 20201222

Exploitation Mechanism

The vulnerability can be exploited by an attacker to trigger a NULL pointer dereference in the swf_GetBits() function, leading to a Denial of Service condition.

Mitigation and Prevention

Addressing the CVE-2021-42198 vulnerability involves taking immediate steps and implementing long-term security practices.

Immediate Steps to Take

Consider applying vendor-supplied patches or updates once available.
Monitor official sources for security advisories related to swftools.
Implement network security best practices to mitigate potential exploitation of this vulnerability.

Long-Term Security Practices

Conduct regular security assessments and audits of software components.
Stay informed about security updates and patches for the software in use.
Employ proper input validation and sanitization techniques in software development processes.

Patching and Updates

Ensure to apply patches or updates provided by the vendor to remediate the vulnerability and enhance the security of swftools.