CVE-2020-7374 : Exploit Details and Defense Strategies

Documalis Free PDF Editor version 5.7.2.26 and Documalis Free PDF Scanner version 5.7.2.122 are affected by a stack-based buffer overflow vulnerability that allows attackers to execute remote code.

Understanding CVE-2020-7374

This CVE involves a vulnerability in Documalis Free PDF Editor and Free PDF Scanner that enables attackers to trigger a buffer overflow on the stack.

What is CVE-2020-7374?

The vulnerability in versions 5.7.2.26 and 5.7.2.122 of Documalis Free PDF Editor and Free PDF Scanner allows attackers to exploit JPEG images within a PDF to execute remote code.

The Impact of CVE-2020-7374

The vulnerability can lead to remote code execution by attackers who can trigger a buffer overflow on the stack, compromising the user's system running the affected software.

Technical Details of CVE-2020-7374

This section provides more technical insights into the CVE.

Vulnerability Description

The issue arises from the lack of proper validation of JPEG image contents within PDF files, leading to a stack-based buffer overflow.

Affected Systems and Versions

Product: Free PDF Editor
Vendor: Documalis
Version: 5.7.2.26
Product: Free PDF Scanner
Vendor: Documalis
Version: 5.7.2.122

Exploitation Mechanism

Attackers can exploit this vulnerability by inserting malicious JPEG images into a PDF file, triggering a buffer overflow and gaining remote code execution.

Mitigation and Prevention

Protecting systems from CVE-2020-7374 requires immediate actions and long-term security practices.

Immediate Steps to Take

Disable the affected software until a patch is available.
Regularly update antivirus software to detect potential exploits.

Long-Term Security Practices

Implement network segmentation to limit the impact of potential attacks.
Educate users on safe browsing habits and avoiding opening suspicious PDF files.

Patching and Updates

Apply patches or updates provided by Documalis to address the vulnerability and prevent exploitation.