CVE-2019-19634 : Exploit Details and Defense Strategies

A vulnerability in the verot.net class.upload.php library versions 1.0.3 and 2.x through 2.0.4, affecting the handling of file extensions, also impacting the K2 extension for Joomla! and related products.

Understanding CVE-2019-19634

This CVE involves a security issue related to file extension handling in specific versions of the verot.net class.upload.php library.

What is CVE-2019-19634?

The vulnerability arises from the omission of the .pht file extension from the list of dangerous extensions, similar to a previously identified issue (CVE-2019-19576).

The Impact of CVE-2019-19634

This vulnerability could potentially allow attackers to upload arbitrary files, leading to unauthorized access, data leakage, or further exploitation of the affected systems.

Technical Details of CVE-2019-19634

The technical aspects of the CVE-2019-19634 vulnerability are as follows:

Vulnerability Description

The vulnerability in class.upload.php versions 1.0.3 and 2.x through 2.0.4 allows for the upload of files with the .pht extension, which should be restricted.

Affected Systems and Versions

verot.net class.upload.php library versions 1.0.3 and 2.x through 2.0.4
K2 extension for Joomla! and related products

Exploitation Mechanism

Attackers can exploit this vulnerability by uploading malicious files with the .pht extension, bypassing security restrictions.

Mitigation and Prevention

To address CVE-2019-19634, consider the following mitigation strategies:

Immediate Steps to Take

Update the verot.net class.upload.php library to a patched version that addresses the file extension handling issue.
Implement file upload restrictions and validation to prevent the upload of potentially harmful file types.

Long-Term Security Practices

Regularly monitor and audit file uploads on the affected systems.
Educate users on safe file handling practices to prevent inadvertent file uploads.

Patching and Updates

Stay informed about security updates for the verot.net class.upload.php library and related extensions.
Apply patches promptly to mitigate known vulnerabilities and enhance system security.