CVE-2023-36833

Summary

CVE-2023-36833 is a Use After Free vulnerability in Juniper Networks Junos OS Evolved on select PTX Series Routers (PTX10001-36MR, PTX10004, PTX10008, PTX10016 with LC1201/1202). An unauthenticated attacker can exploit this issue by triggering a Denial of Service (DoS) event on affected devices. The vulnerability is caused by a crash in the 'aftman-bt' process following multiple flaps on a multicast-only fast reroute (MoFRR) enabled interface. The respective FPC then stops forwarding traffic and requires rebooting to restore service. The affected Junos OS Evolved versions include 21.2R1-EVO and later, 21.3R1-EVO and later, 21.4 versions prior to 21.4R3-S3-EVO, 22.1R1-EVO and later, 22.2 versions prior to 22.2R3-S2-EVO, 22.3 versions prior to 22.3R3-EVO, and 22.4 versions prior to 22.4R1-S2-EVO, 22.4R2-EVO.

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