Steel-Belted Radius Carrier Edition: Remote code execution vulnerability when EAP Authentication is configured.
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
Summary
A stack-based Buffer Overflow vulnerability in Juniper Networks SBR Carrier with EAP (Extensible Authentication Protocol) authentication configured, allows an attacker sending specific packets causing the radius daemon to crash resulting with a Denial of Service (DoS) or leading to remote code execution (RCE). By continuously sending this specific packets, an attacker can repeatedly crash the radius daemon, causing a sustained Denial of Service (DoS). This issue affects Juniper Networks SBR Carrier: 8.4.1 versions prior to 8.4.1R19; 8.5.0 versions prior to 8.5.0R10; 8.6.0 versions prior to 8.6.0R4.
Why it matters now
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 | SBR Carrier | 8.4.1 to before 8.4.1R19; 8.5.0 to before 8.5.0R10; 8.6.0 to before 8.6.0R4 | 8.4.1R19, 8.5.0R10, 8.6.0R4 | Patch available | CNA |
- SBR Carrier VendorJuniper Affected 8.4.1 to before 8.4.1R19; 8.5.0 to before 8.5.0R10; 8.6.0 to before 8.6.0R4 Fixed in 8.4.1R19, 8.5.0R10, 8.6.0R4 Patch available CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:juniper:steel-belted_radius_carrier:8.4.1:-:*:*:*:*:*:* | 8.4.1 | Vulnerable | Juniper |
| cpe:2.3:a:juniper:steel-belted_radius_carrier:8.4.1:r13:*:*:*:*:*:* | 8.4.1 r13 | Vulnerable | Juniper |
| cpe:2.3:a:juniper:steel-belted_radius_carrier:8.5.0:-:*:*:*:*:*:* | 8.5.0 | Vulnerable | Juniper |
| cpe:2.3:a:juniper:steel-belted_radius_carrier:8.5.0:r4:*:*:*:*:*:* | 8.5.0 r4 | Vulnerable | Juniper |
| cpe:2.3:a:juniper:steel-belted_radius_carrier:8.6.0:*:*:*:*:*:*:* | 8.6.0 | Vulnerable | Juniper |
- cpe:2.3:a:juniper:steel-belted_radius_carrier:8.4.1:-:*:*:*:*:*:* Versions 8.4.1 Vulnerable ·Juniper
- cpe:2.3:a:juniper:steel-belted_radius_carrier:8.4.1:r13:*:*:*:*:*:* Versions 8.4.1 r13 Vulnerable ·Juniper
- cpe:2.3:a:juniper:steel-belted_radius_carrier:8.5.0:-:*:*:*:*:*:* Versions 8.5.0 Vulnerable ·Juniper
- cpe:2.3:a:juniper:steel-belted_radius_carrier:8.5.0:r4:*:*:*:*:*:* Versions 8.5.0 r4 Vulnerable ·Juniper
- cpe:2.3:a:juniper:steel-belted_radius_carrier:8.6.0:*:*:*:*:*:*:* Versions 8.6.0 Vulnerable ·Juniper
Remediation
- Fix · CNA SBR Carrier (Juniper Networks) Fixed in 8.4.1R19, 8.5.0R10, 8.6.0R4
Timeline
- 2026-10-02 Threatist record created from CVE-2021-0276
- 2026-10-03 Alias added: GHSA-rhq8-hg5g-9g9g
References
Advisory 1
Sources
- CVE-2021-0276 · CVE Program
- CVE-2021-0276 · NVD
- FIRST EPSS
- GHSA-rhq8-hg5g-9g9g · 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