Junos OS: MX10k Series: 'show system firmware' CLI command may lead to LC480 or LC2101 line card reset (Juniper Networks Junos OS)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.11 % · percentile 1 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- juniper
- NVD status
- Analyzed
Description
A Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in the method to collect FPC Ethernet firmware statistics of Juniper Networks Junos OS on MX10k Series allows a local, low-privileged attacker executing the 'show system firmware' CLI command to cause an LC480 or LC2101 line card to reset. On MX10k Series systems with LC480 or LC2101 line cards, repeated execution of the 'show system firmware' CLI command can cause the line card to crash and restart. Additionally, some time after the line card crashes, chassisd may also crash and restart, generating a core dump.This issue affects Junos OS on MX10k Series: * all versions before 21.2R3-S10, * from 21.4 before 21.4R3-S9, * from 22.2 before 22.2R3-S7, * from 22.4 before 22.4R3-S6, * from 23.2 before 23.2R2-S2, * from 23.4 before 23.4R2-S3, * from 24.2 before 24.2R2.
Weaknesses (CWE)
- CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | juniper |
| CVSS 4.0 | MEDIUM 6.8 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M/U:Amber | juniper |
| CVSS 4.0 | MEDIUM 6.8 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/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:X/RE:M/U:Amber | NVD · sirt@juniper.net (Secondary) |
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · sirt@juniper.net (Secondary) |
| CVSS 3.1 | MEDIUM 4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2026-2682
- GCVE · GCVE-0-2026-21912
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:*:*:*:*:*:*:*:*< 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:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.2:r3-s9:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.4:-:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.4:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.4:r1-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.4:r1-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.4:r2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.4:r2-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.4:r2-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.4:r3:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.4:r3-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.4:r3-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.4:r3-s3:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.4:r3-s4:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.4:r3-s5:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.4:r3-s6:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.4:r3-s7:*:*:*:*:*:*cpe:2.3:o:juniper:junos:21.4:r3-s8:*:*:*:*:*:*cpe:2.3:o:juniper:junos:22.2:-:*:*:*:*:*:*cpe:2.3:o:juniper:junos:22.2:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:22.2:r1-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:22.2:r1-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:22.2:r2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:22.2:r2-s1:*:*:*:*:*:*- +38 more
Affected products
| Product | Versions |
|---|---|
| Juniper Networks · Junos OS | affected 0 < 21.2R3-S10 ; affected 21.4 < 21.4R3-S9 ; affected 22.2 < 22.2R3-S7 ; affected 22.4 < 22.4R3-S6 ; affected 23.2 < 23.2R2-S2 ; affected 23.4 < 23.4R2-S3 |
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 |