Junos OS Evolved: Flapping management interface causes MAC learning on label-switched interfaces to stop (Juniper Networks Junos OS Evolved)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.24 % · percentile 15 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- juniper
- NVD status
- Analyzed
Description
An Incorrect Calculation vulnerability in the Layer 2 Control Protocol Daemon (l2cpd) of Juniper Networks Junos OS Evolved allows an unauthenticated network-adjacent attacker flapping the management interface to cause the learning of new MACs over label-switched interfaces (LSI) to stop while generating a flood of logs, resulting in high CPU usage. When the issue is seen, the following log message will be generated: op:1 flag:0x6 mac:xx:xx:xx:xx:xx:xx bd:2 ifl:13302 reason:0(REASON_NONE) i-op:6(INTRNL_OP_HW_FORCE_DELETE) status:10 lstatus:10 err:26(GETIFBD_VALIDATE_FAILED) err-reason 4(IFBD_VALIDATE_FAIL_EPOCH_MISMATCH) hw_wr:0x4 ctxsync:0 fwdsync:0 rtt-id:51 p_ifl:0 fwd_nh:0 svlbnh:0 event:- smask:0x100000000 dmask:0x0 mplsmask 0x1 act:0x5800 extf:0x0 pfe-id 0 hw-notif-ifl 13302 programmed-ifl 4294967295 pseudo-vtep underlay-ifl-idx 0 stack:GET_MAC, ALLOCATE_MAC, GET_IFL, GET_IFF, GET_IFBD, STOP, This issue affects Junos OS Evolved: * all versions before 21.4R3-S7-EVO, * from 22.2 before 22.2R3-S4-EVO, * from 22.3 before 22.3R3-S3-EVO, * from 22.4 before 22.4R3-S2-EVO, * from 23.2 before 23.2R2-S1-EVO, * from 23.4 before 23.4R1-S2-EVO, 23.4R2-EVO.
Weaknesses (CWE)
- CWE-682 — Incorrect Calculation
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:A/V:C/RE:M/U:Amber | 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:A/V:C/RE:M/U:Amber | 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-2026-2699
- GCVE · GCVE-0-2026-21911
CERT-FR advisories
- CERTFR-2026-AVI-0050 — Multiples vulnérabilités dans les produits Juniper Networks · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:*< 21.4cpe:2.3:o:juniper:junos_os_evolved:21.4:-:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:21.4:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:21.4:r1-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:21.4:r1-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:21.4:r2:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:21.4:r2-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:21.4:r2-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:21.4:r3:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s3:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s4:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s5:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s6:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.2:-:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.2:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.2:r1-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.2:r1-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.2:r2:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.2:r2-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.2:r2-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.2:r3:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.2:r3-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.2:r3-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.2:r3-s3:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.3:-:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.3:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.3:r1-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.3:r1-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.3:r2:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.3:r2-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.3:r2-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.3:r3:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.3:r3-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.3:r3-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.4:-:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.4:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.4:r1-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:22.4:r1-s2:*:*:*:*:*:*- +14 more
Affected products
| Product | Versions |
|---|---|
| Juniper Networks · Junos OS Evolved | affected 0 < 21.4R3-S7-EVO ; affected 22.2 < 22.2R3-S4-EVO ; affected 22.3 < 22.3R3-S3-EVO ; affected 22.4 < 22.4R3-S2-EVO ; affected 23.2 < 23.2R2-S1-EVO ; affected 23.4 < 23.4R1-S2-EVO, 23.4R2-EVO |
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 |