CVE-2018-12939 : Exploit Details and Defense Strategies

Version 5.1.8 of SeedDMS (previously LetoDMS and MyDMS) has a vulnerability in directory traversal, allowing an attacker to modify or delete files and potentially execute arbitrary code.

Understanding CVE-2018-12939

What is CVE-2018-12939?

SeedDMS version 5.1.8 is susceptible to a directory traversal flaw that enables authenticated attackers to manipulate files using a specific parameter.

The Impact of CVE-2018-12939

This vulnerability permits attackers to alter or delete files and execute arbitrary code, posing a significant security risk to affected systems.

Technical Details of CVE-2018-12939

Vulnerability Description

The flaw in SeedDMS version 5.1.8 allows attackers to exploit a directory traversal vulnerability by inserting specific characters in a file parameter.

Affected Systems and Versions

Product: SeedDMS
Vendor: N/A
Versions affected: 5.1.8

Exploitation Mechanism

Attackers with authentication can insert malicious characters in the "qquuid" parameter of the file "op/op.UploadChunks.php" to manipulate files and potentially execute arbitrary code.

Mitigation and Prevention

Immediate Steps to Take

Update SeedDMS to version 5.1.8 to mitigate the vulnerability.
Monitor system logs for any suspicious activities.

Long-Term Security Practices

Implement strict input validation to prevent directory traversal attacks.
Regularly audit and review file permissions to restrict unauthorized access.

Patching and Updates

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