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CVE-2021-39541 Explained : Impact and Mitigation

Discover details about CVE-2021-39541, a vulnerability in pdftools through 20200714 that allows attackers to trigger a Denial of Service. Learn about impacts, affected systems, and mitigation steps.

This CVE-2021-39541 article provides insights into a vulnerability discovered in pdftools.

Understanding CVE-2021-39541

CVE-2021-39541 is a vulnerability found in pdftools that can lead to a Denial of Service attack due to a NULL pointer dereference in the Analyze::AnalyzeXref() function.

What is CVE-2021-39541?

The vulnerability, discovered in pdftools through 20200714, allows attackers to trigger a Denial of Service by exploiting a NULL pointer dereference in analyze.cpp.

The Impact of CVE-2021-39541

The vulnerability could be exploited by attackers to cause a Denial of Service on systems running the affected version of pdftools.

Technical Details of CVE-2021-39541

CVE-2021-39541 has the following technical details:

Vulnerability Description

A NULL pointer dereference exists in the function Analyze::AnalyzeXref(), leading to a Denial of Service.

Affected Systems and Versions

        Affected Product: pdftools
        Affected Version: Through 20200714

Exploitation Mechanism

        The issue arises from a NULL pointer dereference in analyze.cpp, easily triggered by attackers.

Mitigation and Prevention

To address CVE-2021-39541, consider the following measures:

Immediate Steps to Take

        Update pdftools to a non-vulnerable version.
        Apply security patches provided by the vendor.

Long-Term Security Practices

        Regularly update software to the latest versions.
        Implement proper input validation to prevent NULL pointer dereference vulnerabilities.

Patching and Updates

        Stay informed about security updates for pdftools.

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