Unrestricted file upload vulnerability in the uploadImageCommon function in the UploadAjaxAction script in the WebAccess Dashboard Viewer in Advantech WebAccess before 8.1 allows remote attackers to write to files of arbitrary types via unspecified vectors.
Vulnerabilidad de carga de archivos sin restricciones en la función uploadImageCommon en el script UploadAjaxAction en la WebAccess Dashboard Viewer en Advantech WebAccess en versiones anteriores a 8.1 permite a atacantes remotos escribir en archivos de tipos arbitrarios a través de vectores no especificados.
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Advantech WebAccess. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the WebAccess Dashboard Viewer. Insufficient validation within the SaveGeneralFile functionality allows unauthenticated callers to upload arbitrary code to directories in the server where the code can be automatically executed under the high-privilege context of the IIS AppPool. An attacker can leverage this vulnerability to execute arbitrary code under the context of SYSTEM.
