How could an attacker exploit this vulnerability? An attacker could exploit this path traversal vulnerability by leveraging the OcsPowershell endpoint within Skype for Business Server 2019 CU7 Hotfix 2 and Skype for Business Server 2015 CU13 Hotfix 1. Exploitation of this vulnerability requires the authenticated remote user be granted either the CsVoiceAdministrator or CsServerAdministrator role in order to create arbitrary files on the server. This exploit would allow the attacker to execute arbitrary code on the server. According to the CVSS metric, privileges required is high (PR:H). What does that mean for this vulnerability? Successful exploitation of this vulnerability requires the attacker or targeted user to be granted an administrative role in the Skype for Business Control Panel. To help retain security and role-based access control integrity, add users to the groups that define what role the user performs in management of the Skype for Business Server deployment.
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