CVE-2021-28098: High severity forescout counteract vulnerability
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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2021-28098?
CVE-2021-28098 is classified as a local privilege escalation vulnerability.
How does CVE-2021-28098 affect Forescout CounterACT?
CVE-2021-28098 allows an attacker to exploit the logging function in Forescout CounterACT to gain administrative privileges.
What versions of Forescout CounterACT are affected by CVE-2021-28098?
CVE-2021-28098 affects all versions of Forescout CounterACT prior to 8.1.4.
How can I mitigate CVE-2021-28098?
To mitigate CVE-2021-28098, it is essential to upgrade Forescout CounterACT to version 8.1.4 or later.
What is the main issue described in CVE-2021-28098?
The main issue in CVE-2021-28098 is that the SecureConnector component writes log entries with full file permissions, potentially allowing unauthorized access.