CVE-2019-9084 : Exploit Details and Defense Strategies

Hoteldruid before version 2.3.1 is affected by a division by zero vulnerability in the $num_tabelle parameter within the tab_tariffe.php file. This flaw allows an attacker to disrupt business functions, potentially leading to a denial of service.

Understanding CVE-2019-9084

Hoteldruid version 2.3.1 and earlier are susceptible to a division by zero issue that can be exploited to cause a denial of service.

What is CVE-2019-9084?

This vulnerability arises due to improper handling of non-numeric values in the $num_tabelle parameter within the tab_tariffe.php file of Hoteldruid. By manipulating the numtariffa1 parameter, an attacker can trigger a division by zero error.

The Impact of CVE-2019-9084

Exploitation of this vulnerability could allow an attacker to disrupt specific business functions of Hoteldruid, potentially resulting in a denial of service.

Technical Details of CVE-2019-9084

Hoteldruid before version 2.3.1 is affected by a division by zero vulnerability in the $num_tabelle parameter within the tab_tariffe.php file.

Vulnerability Description

The issue stems from the mishandling of non-numeric values, specifically in the numtariffa1 parameter, which can lead to a division by zero error.

Affected Systems and Versions

Hoteldruid version 2.3.1 and earlier

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating the numtariffa1 parameter in the tab_tariffe.php file.
An example of this vulnerability can be observed in the /tab_tariffe.php?anno=[YEAR]&numtariffa1=1a URI.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2019-9084.

Immediate Steps to Take

Update Hoteldruid to version 2.3.1 or later to mitigate the vulnerability.
Regularly monitor and audit the application for any suspicious activities.

Long-Term Security Practices

Implement input validation mechanisms to prevent the insertion of non-numeric values.
Educate administrators on secure coding practices and the importance of handling user input securely.

Patching and Updates

Apply patches and updates provided by Hoteldruid to fix the division by zero vulnerability.