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TI-2023-18627 Aliases CVE-2023-36833GHSA-c9pw-fcq9-5p4q

Use after free in Juniper Junos OS Evolved

Priority LOW 29CWE-416Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00317 24th percentileScored 2026-11-07
Fix Fixed Junos OS Evolved (Juniper Networks): 21.4R3-S3-EVO, 22.2R3-S2-EVO, 22.3R3-EVO +2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
JuniperJunos OS Evolved21.2 and later; 21.3 and later; 21.4 to before 21.4R3-S3-EVO; 22.1 and later; 22.2 to before 22.2R3-S2-EVO; 22.3 to before 22.3R3-EVO; 22.4 to before 22.4R1-S2-EVO, 22.4R2-EVO21.4R3-S3-EVO, 22.2R3-S2-EVO, 22.3R3-EVO, 22.4R1-S2-EVO, 22.4R2-EVOPatch availableCNA
  • Junos OS Evolved VendorJuniper Affected 21.2 and later; 21.3 and later; 21.4 to before 21.4R3-S3-EVO; 22.1 and later; 22.2 to before 22.2R3-S2-EVO; 22.3 to before 22.3R3-EVO; 22.4 to before 22.4R1-S2-EVO, 22.4R2-EVO Fixed in 21.4R3-S3-EVO, 22.2R3-S2-EVO, 22.3R3-EVO, 22.4R1-S2-EVO, 22.4R2-EVO Patch available CNA

CPE configurations NVD · 61

CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos_os_evolved:21.2:-:*:*:*:*:*:*21.2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.2:r1:*:*:*:*:*:*21.2 r1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.2:r1-s1:*:*:*:*:*:*21.2 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.2:r1-s2:*:*:*:*:*:*21.2 r1-s2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.2:r2:*:*:*:*:*:*21.2 r2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.2:r2-s1:*:*:*:*:*:*21.2 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.2:r2-s2:*:*:*:*:*:*21.2 r2-s2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.2:r3:*:*:*:*:*:*21.2 r3VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.2:r3-s1:*:*:*:*:*:*21.2 r3-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.2:r3-s2:*:*:*:*:*:*21.2 r3-s2VulnerableJuniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.2:-:*:*:*:*:*:* Versions 21.2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.2:r1:*:*:*:*:*:* Versions 21.2 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.2:r1-s1:*:*:*:*:*:* Versions 21.2 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.2:r1-s2:*:*:*:*:*:* Versions 21.2 r1-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.2:r2:*:*:*:*:*:* Versions 21.2 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.2:r2-s1:*:*:*:*:*:* Versions 21.2 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.2:r2-s2:*:*:*:*:*:* Versions 21.2 r2-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.2:r3:*:*:*:*:*:* Versions 21.2 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.2:r3-s1:*:*:*:*:*:* Versions 21.2 r3-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.2:r3-s2:*:*:*:*:*:* Versions 21.2 r3-s2 Vulnerable ·Juniper
Show 51 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos_os_evolved:21.2:r3-s3:*:*:*:*:*:*21.2 r3-s3VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.2:r3-s4:*:*:*:*:*:*21.2 r3-s4VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.2:r3-s5:*:*:*:*:*:*21.2 r3-s5VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.3:-:*:*:*:*:*:*21.3VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.3:r1:*:*:*:*:*:*21.3 r1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.3:r1-s1:*:*:*:*:*:*21.3 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.3:r2:*:*:*:*:*:*21.3 r2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.3:r2-s1:*:*:*:*:*:*21.3 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.3:r2-s2:*:*:*:*:*:*21.3 r2-s2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.3:r3:*:*:*:*:*:*21.3 r3VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.3:r3-s1:*:*:*:*:*:*21.3 r3-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.3:r3-s2:*:*:*:*:*:*21.3 r3-s2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.3:r3-s3:*:*:*:*:*:*21.3 r3-s3VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.3:r3-s4:*:*:*:*:*:*21.3 r3-s4VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.4:-:*:*:*:*:*:*21.4VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.4:r1:*:*:*:*:*:*21.4 r1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.4:r1-s1:*:*:*:*:*:*21.4 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.4:r1-s2:*:*:*:*:*:*21.4 r1-s2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.4:r2:*:*:*:*:*:*21.4 r2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.4:r2-s1:*:*:*:*:*:*21.4 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.4:r2-s2:*:*:*:*:*:*21.4 r2-s2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.4:r3:*:*:*:*:*:*21.4 r3VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s1:*:*:*:*:*:*21.4 r3-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s2:*:*:*:*:*:*21.4 r3-s2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.1:r1:*:*:*:*:*:*22.1 r1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.1:r1-s1:*:*:*:*:*:*22.1 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.1:r1-s2:*:*:*:*:*:*22.1 r1-s2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.1:r2:*:*:*:*:*:*22.1 r2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.1:r2-s1:*:*:*:*:*:*22.1 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.1:r3:*:*:*:*:*:*22.1 r3VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.1:r3-s1:*:*:*:*:*:*22.1 r3-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.1:r3-s2:*:*:*:*:*:*22.1 r3-s2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.1:r3-s3:*:*:*:*:*:*22.1 r3-s3VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.2:r1:*:*:*:*:*:*22.2 r1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.2:r1-s1:*:*:*:*:*:*22.2 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.2:r2:*:*:*:*:*:*22.2 r2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.2:r2-s1:*:*:*:*:*:*22.2 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.2:r2-s2:*:*:*:*:*:*22.2 r2-s2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.2:r3:*:*:*:*:*:*22.2 r3VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.2:r3-s1:*:*:*:*:*:*22.2 r3-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.3:r1:*:*:*:*:*:*22.3 r1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.3:r1-s1:*:*:*:*:*:*22.3 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.3:r1-s2:*:*:*:*:*:*22.3 r1-s2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.3:r2:*:*:*:*:*:*22.3 r2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.3:r2-s1:*:*:*:*:*:*22.3 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.4:r1:*:*:*:*:*:*22.4 r1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:22.4:r1-s1:*:*:*:*:*:*22.4 r1-s1VulnerableJuniper
cpe:2.3:h:juniper:ptx10001-36mr:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ptx10004:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ptx10008:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:ptx10016:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.2:r3-s3:*:*:*:*:*:* Versions 21.2 r3-s3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.2:r3-s4:*:*:*:*:*:* Versions 21.2 r3-s4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.2:r3-s5:*:*:*:*:*:* Versions 21.2 r3-s5 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.3:-:*:*:*:*:*:* Versions 21.3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.3:r1:*:*:*:*:*:* Versions 21.3 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.3:r1-s1:*:*:*:*:*:* Versions 21.3 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.3:r2:*:*:*:*:*:* Versions 21.3 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.3:r2-s1:*:*:*:*:*:* Versions 21.3 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.3:r2-s2:*:*:*:*:*:* Versions 21.3 r2-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.3:r3:*:*:*:*:*:* Versions 21.3 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.3:r3-s1:*:*:*:*:*:* Versions 21.3 r3-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.3:r3-s2:*:*:*:*:*:* Versions 21.3 r3-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.3:r3-s3:*:*:*:*:*:* Versions 21.3 r3-s3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.3:r3-s4:*:*:*:*:*:* Versions 21.3 r3-s4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.4:-:*:*:*:*:*:* Versions 21.4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.4:r1:*:*:*:*:*:* Versions 21.4 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.4:r1-s1:*:*:*:*:*:* Versions 21.4 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.4:r1-s2:*:*:*:*:*:* Versions 21.4 r1-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.4:r2:*:*:*:*:*:* Versions 21.4 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.4:r2-s1:*:*:*:*:*:* Versions 21.4 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.4:r2-s2:*:*:*:*:*:* Versions 21.4 r2-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.4:r3:*:*:*:*:*:* Versions 21.4 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s1:*:*:*:*:*:* Versions 21.4 r3-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s2:*:*:*:*:*:* Versions 21.4 r3-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.1:r1:*:*:*:*:*:* Versions 22.1 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.1:r1-s1:*:*:*:*:*:* Versions 22.1 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.1:r1-s2:*:*:*:*:*:* Versions 22.1 r1-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.1:r2:*:*:*:*:*:* Versions 22.1 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.1:r2-s1:*:*:*:*:*:* Versions 22.1 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.1:r3:*:*:*:*:*:* Versions 22.1 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.1:r3-s1:*:*:*:*:*:* Versions 22.1 r3-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.1:r3-s2:*:*:*:*:*:* Versions 22.1 r3-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.1:r3-s3:*:*:*:*:*:* Versions 22.1 r3-s3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.2:r1:*:*:*:*:*:* Versions 22.2 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.2:r1-s1:*:*:*:*:*:* Versions 22.2 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.2:r2:*:*:*:*:*:* Versions 22.2 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.2:r2-s1:*:*:*:*:*:* Versions 22.2 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.2:r2-s2:*:*:*:*:*:* Versions 22.2 r2-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.2:r3:*:*:*:*:*:* Versions 22.2 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.2:r3-s1:*:*:*:*:*:* Versions 22.2 r3-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.3:r1:*:*:*:*:*:* Versions 22.3 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.3:r1-s1:*:*:*:*:*:* Versions 22.3 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.3:r1-s2:*:*:*:*:*:* Versions 22.3 r1-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.3:r2:*:*:*:*:*:* Versions 22.3 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.3:r2-s1:*:*:*:*:*:* Versions 22.3 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.4:r1:*:*:*:*:*:* Versions 22.4 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:22.4:r1-s1:*:*:*:*:*:* Versions 22.4 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:h:juniper:ptx10001-36mr:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ptx10004:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ptx10008:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:ptx10016:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper

Remediation

  • Fix · CNA Junos OS Evolved (Juniper Networks) Fixed in 21.4R3-S3-EVO, 22.2R3-S2-EVO, 22.3R3-EVO, 22.4R1-S2-EVO, 22.4R2-EVO

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-36833
  2. 2026-10-03 Alias added: GHSA-c9pw-fcq9-5p4q

References

Advisory 1

  • TI-2026-17602 Junos OS Evolved: PTX Series: A vulnerability allows a unauthenticated, network-based attacker to execute code as root CVSS 4.0CRITICAL 9.3
  • TI-2026-17601 Junos OS and Junos OS Evolved: Configuration of a specific SSH option results in mgd crash CVSS 4.0MEDIUM 6.7
  • TI-2023-04136 Improper input validation in Juniper Junos OS CVSS 3.1HIGH 7.5
  • TI-2026-74215 Stack-based buffer overflow in Junos OS rpd triggered by BGP peers CVSS 4.0CRITICAL 9.3
  • TI-2026-74211 Authentication bypass in Juniper J-Web allows pre-auth CGI execution CVSS 4.0CRITICAL 9.3
  • TI-2021-00146 Junos OS and Junos OS Evolved: Upon receipt of a specific BGP FlowSpec message network traffic may be disrupted. CVSS 3.1CRITICAL 10.0
See all 249 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences