A NULL Pointer Dereference vulnerability in Juniper Networks Junos OS Evolved on ACX7024, ACX7100-32C and ACX7100-48L allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).

If a specific IPv4 UDP packet is received and sent to the Routing Engine (RE) packetio crashes and restarts which causes a momentary traffic interruption. Continued receipt of such packets will lead to a sustained DoS.

This issue does not happen with IPv6 packets.

This issue affects Juniper Networks Junos OS Evolved on ACX7024, ACX7100-32C and ACX7100-48L:



  *  21.4-EVO versions earlier than 21.4R3-S6-EVO;
  *  22.1-EVO versions earlier than 22.1R3-S5-EVO;
  *  22.2-EVO versions earlier than 22.2R2-S1-EVO, 22.2R3-EVO;
  *  22.3-EVO versions earlier than 22.3R2-EVO.




This issue does not affect Juniper Networks Junos OS Evolved versions earlier than 21.4R1-EVO.

Juniper Networks, Inc. AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Juniper Networks, Inc. CWE-476

Juniper Networks, Inc. https://supportportal.juniper.net/JSA75743 [No types assigned]

Juniper Networks, Inc. https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L [No types assigned]