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Once in the "Terminating" state, the endpoint subscriber will no longer be able to access the network. These spoofed messages cause the Junos OS General Authentication Service (authd) daemon to force the broadband subscriber into this "Terminating" state which the subscriber will not recover from thereby causing a Denial of Service (DoS) to the endpoint device. In broadband environments, including but not limited to Enhanced Subscriber Management, (CHAP, PPP, DHCP, etc.), on Juniper Networks Junos OS devices where RADIUS servers are configured for managing subscriber access and a subscriber is logged in and then requests to logout, the subscriber may be forced into a "Terminating" state by an attacker who is able to send spoofed messages appearing to originate from trusted RADIUS server(s) destined to the device in response to the subscriber's request. Juniper Networks Junos OS Evolved 20.1 versions prior to 20.1R3-EVO 20.2 versions prior to 20.2R3-EVO 20.3 versions prior to 20.3R2-EVO. This issue does not affect Juniper Networks Junos OS versions prior to 19.2R1.
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Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. In Point to MultiPoint (P2MP) scenarios within established sessions between network or adjacent neighbors the improper use of a source to destination copy write operation combined with a Stack-based Buffer Overflow on certain specific packets processed by the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved sent by a remote unauthenticated network attacker causes the RPD to crash causing a Denial of Service (DoS).