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Path Traversal occurrences in Interscan Web Security Virtual Appliance
A vulnerability in Trend Micro InterScan Web Security Virtual Appliance 6.5 SP2 could allow an attacker to bypass a global authorization check for anonymous users by manipulating request paths. (2020-12-17, CVE-2020-8463)
A vulnerability in Trend Micro InterScan Web Security Virtual Appliance 6.5 may allow remote attackers to disclose sensitive informatoin on affected installations. (2020-05-27, CVE-2020-8604)
Why Path Traversal can be dangerous
Relative Path Confusion means that your web server is configured to serve responses to ambiguous URLs. This configuration can possibly cause confusion about the correct relative path for the URL. It is also an issue of resources, such as images, styles etc., which are specified in the response using relative path, not the absolute URL.
If the web browser permits to parse "cross-content" response, the attacker may be able to fool the web browser into interpreting HTML into other content types, which can then lead to a cross site scripting attack (link do XSS).