CVE-2021-3688

A flaw was found in Red Hat JBoss Core Services HTTP Server in all versions, where it does not properly normalize the path component of a request URL contains dot-dot-semicolon(s). This flaw could allow an attacker to access unauthorized information or possibly conduct further attacks. The highest threat from this vulnerability is to data confidentiality and integrity.

Mitigation

Manually add LocationMatch directive to deny any possible problem requests in the JBCS httpd configuration. For example:

<LocationMatch ".*\.\.;.*">  
  Require all denied  
</LocationMatch>