Privilege Escalation and Weak Folder Permissions in KioWare Server Version 4.9.6 and Older

CVE-2018-18435 · HIGH Severity

AV:L/AC:L/AU:N/C:C/I:C/A:C

KioWare Server version 4.9.6 and older installs by default to "C:\kioware_com" with weak folder permissions granting any user full permission "Everyone: (F)" to the contents of the directory and it's sub-folders. In addition, the program installs a service called "KWSService" which runs as "Localsystem", this will allow any user to escalate privileges to "NT AUTHORITY\SYSTEM" by substituting the service's binary with a malicious one.

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