Junos OS: MX Series with SPC3, SRX Series: Specific packet in response to a TCP connection establishment by the affected device can crash the PFE (Juniper Networks Junos OS)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.40 % · percentile 35 ()
- 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 MX with SPC3 and SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). When an affected device initiates a TCP connection to an attacker-controlled system that responds with a specific packet, this causes a PFE crash and restart, which affects all services until the system has automatically recovered. This issue can happen among others in the following scenarios: ALG, SSL proxy, UTM, RTLOG, AppQoE probing, AAMW, ICAP, URL filtering. This issue affects Junos OS on MX Series with SPC3, SRX5k Series with SPC3, SRX1600 Series, SRX2300 Series, SRX4000 Series, and vSRX Series: * all versions before 23.2R2-S4, * 23.4 versions before 23.4R2-S5, * 24.2 versions before 24.2R2.
Weaknesses (CWE)
- CWE-754 — Improper Check for Unusual or Exceptional Conditions
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H | juniper |
| CVSS 4.0 | HIGH 8.2 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:A/RE:M | juniper |
| CVSS 4.0 | HIGH 8.2 | CVSS:4.0/AV:N/AC:L/AT:P/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:X | NVD · sirt@juniper.net (Secondary) |
| CVSS 3.1 | MEDIUM 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · sirt@juniper.net (Secondary) |
European references
- ENISA EUVD · EUVD-2026-42709
- GCVE · GCVE-0-2026-57022
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:23.4:-:*:*:*:*:*:*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: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:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Juniper Networks · Junos OS | affected 0 < 23.2R2-S4 ; affected 23.4 < 23.4R2-S5 ; affected 24.2 < 24.2R2 |
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 |