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TI-2021-00219 Aliases CVE-2021-0286GHSA-jq9h-7vhv-whc7

Junos OS Evolved: Specially crafted packets may cause the AFT manager process to crash and restart

Priority LOW 35CWE-703Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

A vulnerability in the handling of exceptional conditions in Juniper Networks Junos OS Evolved (EVO) allows an attacker to send specially crafted packets to the device, causing the Advanced Forwarding Toolkit manager (evo-aftmand-bt or evo-aftmand-zx) process to crash and restart, impacting all traffic going through the FPC, resulting in a Denial of Service (DoS). Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. Following messages will be logged prior to the crash: Feb 2 10:14:39 fpc0 evo-aftmand-bt[16263]: [Error] Nexthop: Failed to get fwd nexthop for nexthop:32710470974358 label:1089551617 for session:18 probe:35 Feb 2 10:14:39 fpc0 evo-aftmand-bt[16263]: [Error] Nexthop: Failed to get fwd nexthop for nexthop:19241453497049 label:1089551617 for session:18 probe:37 Feb 2 10:14:39 fpc0 evo-aftmand-bt[16263]: [Error] Nexthop: Failed to get fwd nexthop for nexthop:19241453497049 label:1089551617 for session:18 probe:44 Feb 2 10:14:39 fpc0 evo-aftmand-bt[16263]: [Error] Nexthop: Failed to get fwd nexthop for nexthop:32710470974358 label:1089551617 for session:18 probe:47 Feb 2 10:14:39 fpc0 audit[16263]: ANOM_ABEND auid=4294967295 uid=0 gid=0 ses=4294967295 pid=16263 comm="EvoAftManBt-mai" exe="/usr/sbin/evo-aftmand-bt" sig=11 Feb 2 10:14:39 fpc0 kernel: audit: type=1701 audit(1612260879.272:17): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=16263 comm="EvoAftManBt-mai" exe="/usr/sbin/evo-aftmand-bt" sig=1 This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R2-EVO; 21.1 versions prior to 21.1R2-EVO.

Why it matters now

EPSS 0.01056 64th percentileScored 2026-11-07
Fix Fixed Junos OS Evolved (Juniper Networks): 20.4R2-EVO, 21.1R2-EVO

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
JuniperJunos OS Evolvedbefore 20.4R2-EVO; 21.1 to before 21.1R2-EVO20.4R2-EVO, 21.1R2-EVOPatch availableCNA
  • Junos OS Evolved VendorJuniper Affected before 20.4R2-EVO; 21.1 to before 21.1R2-EVO Fixed in 20.4R2-EVO, 21.1R2-EVO Patch available CNA

CPE configurations NVD · 15

CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos_os_evolved:19.2:r1:*:*:*:*:*:*19.2 r1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:19.2:r2:*:*:*:*:*:*19.2 r2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:19.3:r1:*:*:*:*:*:*19.3 r1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:19.3:r2:*:*:*:*:*:*19.3 r2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:19.4:r1:*:*:*:*:*:*19.4 r1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:19.4:r2:*:*:*:*:*:*19.4 r2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:19.4:r2-s1:*:*:*:*:*:*19.4 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:20.1:-:*:*:*:*:*:*20.1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:20.1:r1:*:*:*:*:*:*20.1 r1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:20.1:r1-s1:*:*:*:*:*:*20.1 r1-s1VulnerableJuniper
  • cpe:2.3:o:juniper:junos_os_evolved:19.2:r1:*:*:*:*:*:* Versions 19.2 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:19.2:r2:*:*:*:*:*:* Versions 19.2 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:19.3:r1:*:*:*:*:*:* Versions 19.3 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:19.3:r2:*:*:*:*:*:* Versions 19.3 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:19.4:r1:*:*:*:*:*:* Versions 19.4 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:19.4:r2:*:*:*:*:*:* Versions 19.4 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:19.4:r2-s1:*:*:*:*:*:* Versions 19.4 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:20.1:-:*:*:*:*:*:* Versions 20.1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:20.1:r1:*:*:*:*:*:* Versions 20.1 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:20.1:r1-s1:*:*:*:*:*:* Versions 20.1 r1-s1 Vulnerable ·Juniper
Show 5 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos_os_evolved:20.2:-:*:*:*:*:*:*20.2VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:20.3:-:*:*:*:*:*:*20.3VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:20.3:r1:*:*:*:*:*:*20.3 r1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:20.4:r1:*:*:*:*:*:*20.4 r1VulnerableJuniper
cpe:2.3:o:juniper:junos_os_evolved:21.1:r1:*:*:*:*:*:*21.1 r1VulnerableJuniper
  • cpe:2.3:o:juniper:junos_os_evolved:20.2:-:*:*:*:*:*:* Versions 20.2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:20.3:-:*:*:*:*:*:* Versions 20.3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:20.3:r1:*:*:*:*:*:* Versions 20.3 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:20.4:r1:*:*:*:*:*:* Versions 20.4 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:21.1:r1:*:*:*:*:*:* Versions 21.1 r1 Vulnerable ·Juniper

Remediation

  • Fix · CNA Junos OS Evolved (Juniper Networks) Fixed in 20.4R2-EVO, 21.1R2-EVO

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-0286
  2. 2026-10-03 Alias added: GHSA-jq9h-7vhv-whc7

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

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