| Severity | 
						
							
						 | 
					
					
						| Remote | 
						
							
						 | 
					
					
						| Type | 
						
							
								
									| + | 
									Insufficient validation | 
								 
							 
						 | 
					
					
						| Description | 
						
							
								
									| + | 
									An issue has been found in PowerDNS Authoritative Server and PowerDNS Recursor allowing an attacker in position of man-in-the-middle to alter the content of an AXFR because of insufficient validation of TSIG signatures. A missing check of the TSIG time and fudge values in AXFRRetriever, leading to a possible replay attack. | 
								 
							 
						 | 
					
					
						| References | 
						
							
								
									| + | 
									http://seclists.org/oss-sec/2017/q1/97 | 
								 
								
									| + | 
									https://doc.powerdns.com/md/security/powerdns-advisory-2016-04/ | 
								 
							 
						 | 
					
					
						| Notes | 
						
							
								
									| + | 
									PowerDNS Authoritative Server up to and including 3.4.10 and 4.0.1 are affected. PowerDNS Recursor from 4.0.0 up to and including 4.0.3 are affected. | 
								 
							 
						 |