CVE-2019-9084 – In Hoteldruid before 2.3.1, a division by zero was discovered in $num_tab

In Hoteldruid before 2.3.1, a division by zero was discovered in $num_tabelle in tab_tariffe.php (aka the numtariffa1 parameter) due to the mishandling of non-numeric values, as demonstrated by the /tab_tariffe.php?anno=[YEAR]&numtariffa1=1a URI. It could allow an administrator to conduct remote denial of service (disrupting certain business functions of the product).

Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9084

Reference (s):

• http://www.hoteldruid.com/en/download.html
• https://metamorfosec.com/Files/Advisories/METS-2019-005-A_division_by_zero_in_Hoteldruid_before_v2.3.1.txt