An issue was discovered in Forescout CounterACT before 8.1.4. A local privilege escalation vulnerability is present in the logging function. SecureConnector runs with administrative privileges and writes logs entries to a file in %PROGRAMDATA%\ForeScout SecureConnector\ that has full permissions for the Everyone group. Using a symbolic link allows an attacker to point the log file to a privileged location such as %WINDIR%\System32. The resulting log file adopts the file permissions of the source of the symbolic link (in this case, the Everyone group). The log file in System32 can be replaced and renamed with a malicious DLL for DLL hijacking.

Multiple cross-site scripting (XSS) vulnerabilities on the Forescout CounterACT NAC device before 7.0 allow remote attackers to inject arbitrary web script or HTML via (1) the a parameter to assets/login or (2) the query parameter to assets/rangesearch.

The Forescout CounterACT NAC device 6.3.4.1 does not block ARP and ICMP traffic from unrecognized clients, which allows remote attackers to conduct ARP poisoning attacks via crafted packets.

Open redirect vulnerability in assets/login on the Forescout CounterACT NAC device before 7.0 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a URL in the a parameter.

Multiple cross-site scripting (XSS) vulnerabilities in the status program on the ForeScout CounterACT appliance with software 6.3.3.2 through 6.3.4.10 allow remote attackers to inject arbitrary web script or HTML via (1) the loginname parameter in a forgotpass action or (2) the username parameter.