CVE-2023-36833

Description

A Use After Free vulnerability in the packet forwarding engine (PFE) of Juniper Networks Junos OS Evolved on PTX10001-36MR, and PTX10004, PTX10008, PTX10016 with LC1201/1202 allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS). The process 'aftman-bt' will crash after multiple flaps on a multicast-only fast reroute (MoFRR) enabled interface. This will cause the respective FPC to stop forwarding traffic and it needs to be rebooted to restore the service. An indication that the system experienced this issue is the following log message:   <date> <hostname> evo-aftmand-bt[<pid>]: [Error] jexpr_fdb: sanity check failed, ... , app_name L3 Mcast Routes This issue affects Juniper Networks Junos OS Evolved on PTX10001-36MR, PTX10004, PTX10008, PTX10016 with LC1201/1202: 21.2 version 21.2R1-EVO and later versions; 21.3 version 21.3R1-EVO and later versions; 21.4 versions prior to 21.4R3-S3-EVO; 22.1 version 22.1R1-EVO and later versions; 22.2 versions prior to 22.2R3-S2-EVO; 22.3 versions prior to 22.3R3-EVO; 22.4 versions prior to 22.4R1-S2-EVO, 22.4R2-EVO.

Reserved 2023-06-27 | Published 2023-07-14 | Updated 2024-10-22 | Assigner juniper

Problem types

CWE-416 Use After Free

Denial of Service (DoS)

Product status

Default status
unaffected

21.2 before 21.2*
affected

21.3 before 21.3*
affected

21.4 before 21.4R3-S3-EVO
affected

22.1 before 22.1*
affected

22.2 before 22.2R3-S2-EVO
affected

22.3 before 22.3R3-EVO
affected

22.4 before 22.4R1-S2-EVO, 22.4R2-EVO
affected

References

supportportal.juniper.net/JSA71640

cve.org (CVE-2023-36833)

nvd.nist.gov (CVE-2023-36833)

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