Junos OS: QFX10000 Series: IPv6 multicast traffic received on non-IRB interfaces causes a multicast flood (Juniper Networks Junos OS)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.27 % · percentile 19 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- juniper
- NVD status
- Analyzed
Description
An Improper Check for Unusual or Exceptional Conditions vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on QFX10000 Series allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS). On all QFX10000 platforms in an EVPN-VxLAN scenario, if an attacker sends IPv6 multicast traffic and these packets reach the non-IRB interface of a spine switch it floods the packet to other spines and all Ethernet Segment Identifier (ESI) leaf switches. This flooding causes the packet to be forwarded in a endless loop, which can lead to saturation of the involved links and in turn impact to legitimate traffic. This issue affects Junos OS on QFX10000 Series: * all versions before 23.2R2-S7, * 23.4 versions before 23.4R2-S8, * 24.2 versions before 24.2R2-S4, * 24.4 versions before 24.4R2-S4. This issue does not affect Junos version after 24.4 as the QFX10000 Series devices are not supported on newer versions anymore.
Weaknesses (CWE)
- CWE-754 — Improper Check for Unusual or 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/AU:Y/R:U/RE:M | 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:Y/R:U/V:X/RE:M/U:X | 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-2026-42707
- GCVE · GCVE-0-2026-57020
CERT-FR advisories
- CERTFR-2026-AVI-0852 — Multiples vulnérabilités dans les produits Juniper Networks · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*< 23.2cpe:2.3:o:juniper:junos:23.2:-:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.2:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.2:r1-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.2:r1-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.2:r2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.2:r2-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.2:r2-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.2:r2-s3:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.2:r2-s4:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.2:r2-s5:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.2:r2-s6:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.4:-:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.4:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.4:r1-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.4:r1-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.4:r2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.4:r2-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.4:r2-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.4:r2-s3:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.4:r2-s4:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.4:r2-s5:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.4:r2-s6:*:*:*:*:*:*cpe:2.3:o:juniper:junos:23.4:r2-s7:*:*:*:*:*:*cpe:2.3:o:juniper:junos:24.2:-:*:*:*:*:*:*cpe:2.3:o:juniper:junos:24.2:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:24.2:r1-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:24.2:r1-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:24.2:r2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:24.2:r2-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:24.2:r2-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:24.2:r2-s3:*:*:*:*:*:*cpe:2.3:o:juniper:junos:24.4:-:*:*:*:*:*:*cpe:2.3:o:juniper:junos:24.4:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:24.4:r1-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:24.4:r1-s3:*:*:*:*:*:*cpe:2.3:o:juniper:junos:24.4:r2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:24.4:r2-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:24.4:r2-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:24.4:r2-s3:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Juniper Networks · Junos OS | affected 0 < 23.2R2-S7 ; affected 23.4 < 23.4R2-S8 ; affected 24.2 < 24.2R2-S4 ; affected 24.4 < 24.4R2-S4 |
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 |