ColdFusion AMF Deserialization RCE
Description
Adobe ColdFusion's Flash Remoting feature contains a deserialization vulnerability in its Action Message Format (AMF) implementation. When ColdFusion processes untrusted AMF serialized data, an attacker can inject malicious objects that execute arbitrary code during the deserialization process. This vulnerability affects ColdFusion instances with Flash Remoting enabled and does not require authentication to exploit.
Remediation
Apply the security patches provided in Adobe Security Bulletin APSB17-14 immediately. If you are running ColdFusion 2016, update to Update 3 or later. For ColdFusion 11, update to Update 11 or later. For ColdFusion 10, update to Update 22 or later.
If immediate patching is not possible, implement the following temporary mitigations:
1. Disable Flash Remoting if it is not required for business operations
2. Restrict network access to ColdFusion Flash Remoting endpoints using firewall rules or web application firewall (WAF) policies
3. Implement network segmentation to limit exposure of ColdFusion servers
4. Monitor for suspicious AMF traffic patterns and DNS queries to unusual domains
After patching, verify the fix by testing that AMF deserialization no longer processes untrusted serialized objects.