CVE-2018-12940 : What You Need to Know

A vulnerability related to unrestricted file upload has been identified in SeedDMS (formerly LetoDMS and MyDMS) prior to version 5.1.8, allowing remote attackers to execute arbitrary code.

Understanding CVE-2018-12940

This CVE involves a critical vulnerability in SeedDMS that enables attackers to upload malicious files to execute arbitrary code.

What is CVE-2018-12940?

The vulnerability allows remote attackers to upload files with executable extensions, granting them the ability to execute operating system commands within the web root of the application.

The Impact of CVE-2018-12940

Remote attackers can exploit this vulnerability to execute arbitrary code on the target system.
An authenticated attacker can upload a file containing PHP code to perform malicious activities.

Technical Details of CVE-2018-12940

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The flaw exists in "op/op.UploadChunks.php" in SeedDMS, enabling remote attackers to upload files with executable extensions via the "qqfile" parameter.

Affected Systems and Versions

SeedDMS versions prior to 5.1.8 are affected by this vulnerability.

Exploitation Mechanism

Attackers can upload a file with an executable extension through the "qqfile" parameter to execute arbitrary code.

Mitigation and Prevention

Protecting systems from CVE-2018-12940 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update SeedDMS to version 5.1.8 or later to mitigate the vulnerability.
Implement strict file upload validation to prevent malicious uploads.

Long-Term Security Practices

Regularly monitor and audit file uploads for suspicious activities.
Educate users on safe file handling practices to prevent unauthorized uploads.

Patching and Updates

Apply security patches and updates provided by SeedDMS to address this vulnerability.