Junos OS: ACX Series: When 'hot-standby' mode is configured for an L2 circuit, interface flap causes the FEB to crash (Juniper Networks Junos OS)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.30 % · percentile 23 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- juniper
- NVD status
- Analyzed
Description
An Improper Handling of Exceptional Conditions vulnerability in route processing of Juniper Networks Junos OS on specific end-of-life (EOL) ACX Series platforms allows an attacker to crash the Forwarding Engine Board (FEB) by flapping an interface, leading to a Denial of Service (DoS). On ACX1000, ACX1100, ACX2000, ACX2100, ACX2200, ACX4000, ACX5048, and ACX5096 devices, FEB0 will crash when the primary path port of the L2 circuit IGP (Interior Gateway Protocol) on the local device goes down. This issue is seen only when 'hot-standby' mode is configured for the L2 circuit. This issue affects Junos OS on ACX1000, ACX1100, ACX2000, ACX2100, ACX2200, ACX4000, ACX5048, and ACX5096: * all versions before 21.2R3-S9.
Weaknesses (CWE)
- CWE-755 — Improper Handling of Exceptional Conditions
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | juniper |
| CVSS 4.0 | HIGH 7.1 | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:A/RE:M/U:Green | juniper |
| CVSS 4.0 | HIGH 7.1 | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:A/V:X/RE:M/U:Green | NVD · sirt@juniper.net (Secondary) |
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · sirt@juniper.net (Secondary) |
European references
- ENISA EUVD · EUVD-2025-21140
- GCVE · GCVE-0-2025-52947
CERT-FR advisories
- CERTFR-2025-AVI-0583 — Multiples vulnérabilités dans les produits Juniper Networks · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*< 21.2cpe:2.3:o:juniper:junos:21.2:-:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.2:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.2:r1-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.2:r1-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.2:r2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.2:r2-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.2:r2-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.2:r3:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.2:r3-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.2:r3-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.2:r3-s3:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.2:r3-s4:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.2:r3-s5:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.2:r3-s6:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.2:r3-s7:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.2:r3-s8:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Juniper Networks · Junos OS | affected 0 < 21.2R3-S9 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |