Uncontrolled resource consumption in Juniper Junos OS
Priority LOW 35CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-400.
Summary
A vulnerability in Juniper Networks Junos OS ACX500 Series, ACX4000 Series, may allow an attacker to cause a Denial of Service (DoS) by sending a high rate of specific packets to the device, resulting in a Forwarding Engine Board (FFEB) crash. Continued receipt of these packets will sustain the Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS on ACX500 Series, ACX4000 Series: 17.4 versions prior to 17.4R3-S2.
Why it matters now
EPSS 0.00961 61st percentileScored 2026-11-07
Fix Fixed Junos OS (Juniper Networks): 17.4R3-S2
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Juniper | Junos OS | 17.4 to before 17.4R3-S2 | 17.4R3-S2 | Patch available | CNA |
- Junos OS VendorJuniper Affected 17.4 to before 17.4R3-S2 Fixed in 17.4R3-S2 Patch available CNA
CPE configurations NVD · 25
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:juniper:junos:17.4:-:*:*:*:*:*:* | 17.4 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r1:*:*:*:*:*:* | 17.4 r1 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r1-s1:*:*:*:*:*:* | 17.4 r1-s1 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r1-s2:*:*:*:*:*:* | 17.4 r1-s2 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r1-s3:*:*:*:*:*:* | 17.4 r1-s3 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r1-s4:*:*:*:*:*:* | 17.4 r1-s4 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r1-s5:*:*:*:*:*:* | 17.4 r1-s5 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r1-s6:*:*:*:*:*:* | 17.4 r1-s6 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r1-s7:*:*:*:*:*:* | 17.4 r1-s7 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r2:*:*:*:*:*:* | 17.4 r2 | Vulnerable | Juniper |
- cpe:2.3:o:juniper:junos:17.4:-:*:*:*:*:*:* Versions 17.4 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r1:*:*:*:*:*:* Versions 17.4 r1 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r1-s1:*:*:*:*:*:* Versions 17.4 r1-s1 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r1-s2:*:*:*:*:*:* Versions 17.4 r1-s2 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r1-s3:*:*:*:*:*:* Versions 17.4 r1-s3 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r1-s4:*:*:*:*:*:* Versions 17.4 r1-s4 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r1-s5:*:*:*:*:*:* Versions 17.4 r1-s5 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r1-s6:*:*:*:*:*:* Versions 17.4 r1-s6 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r1-s7:*:*:*:*:*:* Versions 17.4 r1-s7 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r2:*:*:*:*:*:* Versions 17.4 r2 Vulnerable ·Juniper
Show 15 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:juniper:junos:17.4:r2-s1:*:*:*:*:*:* | 17.4 r2-s1 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r2-s10:*:*:*:*:*:* | 17.4 r2-s10 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r2-s11:*:*:*:*:*:* | 17.4 r2-s11 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r2-s2:*:*:*:*:*:* | 17.4 r2-s2 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r2-s3:*:*:*:*:*:* | 17.4 r2-s3 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r2-s4:*:*:*:*:*:* | 17.4 r2-s4 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r2-s5:*:*:*:*:*:* | 17.4 r2-s5 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r2-s6:*:*:*:*:*:* | 17.4 r2-s6 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r2-s7:*:*:*:*:*:* | 17.4 r2-s7 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r2-s8:*:*:*:*:*:* | 17.4 r2-s8 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r2-s9:*:*:*:*:*:* | 17.4 r2-s9 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r3:*:*:*:*:*:* | 17.4 r3 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos:17.4:r3-s1:*:*:*:*:*:* | 17.4 r3-s1 | Vulnerable | Juniper |
| cpe:2.3:h:juniper:acx4000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Juniper |
| cpe:2.3:h:juniper:acx500:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Juniper |
- cpe:2.3:o:juniper:junos:17.4:r2-s1:*:*:*:*:*:* Versions 17.4 r2-s1 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r2-s10:*:*:*:*:*:* Versions 17.4 r2-s10 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r2-s11:*:*:*:*:*:* Versions 17.4 r2-s11 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r2-s2:*:*:*:*:*:* Versions 17.4 r2-s2 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r2-s3:*:*:*:*:*:* Versions 17.4 r2-s3 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r2-s4:*:*:*:*:*:* Versions 17.4 r2-s4 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r2-s5:*:*:*:*:*:* Versions 17.4 r2-s5 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r2-s6:*:*:*:*:*:* Versions 17.4 r2-s6 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r2-s7:*:*:*:*:*:* Versions 17.4 r2-s7 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r2-s8:*:*:*:*:*:* Versions 17.4 r2-s8 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r2-s9:*:*:*:*:*:* Versions 17.4 r2-s9 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r3:*:*:*:*:*:* Versions 17.4 r3 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos:17.4:r3-s1:*:*:*:*:*:* Versions 17.4 r3-s1 Vulnerable ·Juniper
- cpe:2.3:h:juniper:acx4000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
- cpe:2.3:h:juniper:acx500:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
Remediation
- Fix · CNA Junos OS (Juniper Networks) Fixed in 17.4R3-S2
Timeline
- 2026-10-02 Threatist record created from CVE-2021-0233
- 2026-10-03 Alias added: GHSA-h524-gfx3-m768
References
Advisory 1
More Juniper Junos vulnerabilities
- TI-2023-18638 Junos OS: EX and SRX Series: A PHP vulnerability in J-Web allows an unauthenticated to… KEVCVSS 3.1CRITICAL 9.8
- TI-2020-01585 Out of Cycle Security Advisory: Junos OS: Security vulnerability in J-Web and web based (HTTP/HTTPS) services KEVCVSS 3.1CRITICAL 9.8
- TI-2015-04610 Assertion failure in ISC BIND named via TKEY queries KEVCVSS 3.1HIGH 7.5
- TI-2025-15550 Junos OS: An local attacker with shell access can execute arbitrary code KEVCVSS 4.0MEDIUM 6.7
- TI-2023-18644 Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload and download arbitrary files KEVCVSS 3.1MEDIUM 5.3
- TI-2023-18640 Junos OS: EX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload arbitrary files KEVCVSS 3.1MEDIUM 5.3
Sources
- CVE-2021-0233 · CVE Program
- CVE-2021-0233 · NVD
- FIRST EPSS
- GHSA-h524-gfx3-m768 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences