CVE-2018-0006

Junos OS: bbe-smgd process denial of service while processing VLAN authentication requests/rejects

MEDIUM

6.5

CVSS Score

Published: January 10, 2018 at 10:00 PM UTC

Updated: June 17, 2026 at 01:29 AM UTC

1 product affected across 1 vendorJunos

Using Junos OS by Juniper Networks?

Get instant alerts when new vulnerabilities affect Junos OS - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM6.5

Exploit prediction

EPSS 0.7%

Description

A high rate of VLAN authentication attempts sent from an adjacent host on the local broadcast domain can trigger high memory utilization by the BBE subscriber management daemon (bbe-smgd), and lead to a denial of service condition. The issue was caused by attempting to process an unbounded number of pending VLAN authentication requests, leading to excessive memory allocation. This issue only affects devices configured for DHCPv4/v6 over AE auto-sensed VLANs, utilized in Broadband Edge (BBE) deployments. Other configurations are unaffected by this issue. Affected releases are Juniper Networks Junos OS: 15.1 versions prior to 15.1R6-S2, 15.1R7; 16.1 versions prior to 16.1R5-S1, 16.1R6; 16.2 versions prior to 16.2R2-S2, 16.2R3; 17.1 versions prior to 17.1R2-S5, 17.1R3; 17.2 versions prior to 17.2R2.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Junos · Juniper Networks

95%

15.1 ≤ v < 15.1R6-S2, 15.1R716.1 ≤ v < 16.1R5-S1, 16.1R616.2 ≤ v < 16.2R2-S2, 16.2R317.1 ≤ v < 17.1R2-S5, 17.1R317.2 ≤ v < 17.2R215.1 15.1 r1 15.1 r2 15.1 r3 15.1 r4 15.1 r5 15.1 r7 16.1 16.1 r1 16.1 r2 16.1 r3 16.1 r4 16.1 r6 16.2 16.2 r1 16.2 r3 17.1 17.1 r1 17.1 r3 17.2 17.2 r1

Affected range stops below 15.1R6-S2, 15.1R7, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.1R5-S1, 16.1R6, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.2R2-S2, 16.2R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.1R2-S5, 17.1R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.2R2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://kb.juniper.net/JSA10834

References (2)

VDB Entryx_refsource_SECTRACKThird Party Advisory

Source: [email protected]

http://www.securitytracker.com/id/1040184

x_refsource_CONFIRMMitigationPatchVendor Advisory

Source: [email protected]

https://kb.juniper.net/JSA10834

CVSS

6.5MEDIUMjuniper

Attack Vector: ADJACENT_NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-770

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card