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             AUSCERT External Security Bulletin Redistribution

JSA11180 - 2021-07 Security Bulletin: Steel-Belted Radius Carrier Edition:
        Remote code execution vulnerability when EAP Authentication
                      is configured. (CVE-2021-0276)
                               15 July 2021


        AusCERT Security Bulletin Summary

Product:           Steel-Belted Radius(SBR) Carrier
Publisher:         Juniper Networks
Operating System:  Juniper
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-0276  

Original Bulletin: 

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2021-07 Security Bulletin: Steel-Belted Radius Carrier Edition: Remote code execution vulnerability when EAP Authentication is configured. (CVE-2021-0276)

Article ID  : JSA11180
Last Updated: 14 Jul 2021
Version     : 1.0

Product Affected:
This issue affects SBR Carrier 8.4.1, 8.5.0, 8.6.0.

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

This issue affects Juniper Networks SBR Carrier:

  o 8.4.1 versions prior to 8.4.1R19;
  o 8.5.0 versions prior to 8.5.0R10;
  o 8.6.0 versions prior to 8.6.0R4.

This issue affects SBR Carrier with EAP authentication configured only when
using Enhanced EAP Logging and TraceLevel setting of 2.

EnhancedEAPLogging = yes

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was seen during production usage.

This issue has been assigned CVE-2021-0276 .


The following software releases have been updated to resolve this specific
issue: 8.4.1R19, 8.5.0R10, 8.6.0R4 and all subsequent releases.

This issue is being tracked as 1465201 .


There are no viable workarounds for this issue.

Software releases or updates are available for download at https://
Modification History:

2021-07-14: Initial Publication.

CVSS Score:
9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Severity Level:
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common
Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

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