Remote Code Execution using Freemarker sandbox escape

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 6.0 EE (6.0.10), 6.0 EE SP1 (6.0.11), 6.0 EE SP2 (6.0.12), 6.1 EE GA1 (6.1.10), 6.1 EE GA2 (6.1.20), 6.1 EE GA3 (6.1.30), 6.2 EE GA1 (6.2.10)
• Fix Version/s: 6.0.X EE, 6.1.X EE, 6.2.X EE
• Component/s: Portal Services > Templates Engine, Security Vulnerability
• Labels:
  • 61-ee-ga3-sp5
  • 62-ee-sp14
  • cumulative-security-update-5
  • liferay-fixpack-portal-54-6130
  • liferay-fixpack-portal-77-6210
  • lsv
  • lsv-173
  • sev-1

• 6.2 EE, 6.1 EE GA3, 6.1 EE GA2: The following portal property has been added:

   
      # 
      # Set a comma delimited list of Java classes the FreeMarker engine can 
      # have access to. The "*" character represents a wildcard in the class 
      # name. Using the "*" as the allowed classes provides behaviour of allowing 
      # everything that is not in restricted classes. 
      # 
      freemarker.engine.allowed.classes= 
  

• 6.1 EE GA1, 6.0 EE SP2, 6.0 EE SP1, 6.0 EE:

   
  
      # 
      # Set a comma delimited list of Java classes the FreeMarker engine can 
      # have access to. The "*" character represents a wildcard in the class 
      # name. Using the "*" as the allowed classes provides behaviour of allowing 
      # everything that is not in restricted classes. 
      # 
      freemarker.engine.allowed.classes= 
  
      # 
      # Set a comma delimited list of java classes the FreeMarker engine cannot 
      # have access to. 
      # 
      freemarker.engine.restricted.classes=\ 
          java.lang.Class,\ 
          java.lang.ClassLoader,\ 
          java.lang.Thread 
  
      # 
      # Set a comma delimited list of java packages the FreeMarker engine cannot 
      # have access to. 
      # 
      freemarker.engine.restricted.packages= 
  

See also https://web.liferay.com/group/customer/products/portal/security-vulnerability/lsv-173