Description

In a Junos Fusion scenario an External Control of Critical State Data vulnerability in the Satellite Device (SD) control state machine of Juniper Networks Junos OS allows an attacker who is able to make physical changes to the cabling of the device to cause a denial of service (DoS). An SD can get rebooted and subsequently controlled by an Aggregation Device (AD) which does not belong to the original Fusion setup and is just connected to an extended port of the SD. To carry out this attack the attacker needs to have physical access to the cabling between the SD and the original AD. This issue affects: Juniper Networks Junos OS 16.1R1 and later versions prior to 18.4R3-S10; 19.1 versions prior to 19.1R3-S7; 19.2 versions prior to 19.2R3-S4. This issue does not affect Juniper Networks Junos OS versions prior to 16.1R1.

Severity

 

CVSS Version 3.x CVSS Version 2.0

CVSS 3.x Severity and Metrics:

CNA:  Juniper Networks, Inc.

Base Score:  6.8 MEDIUM

Vector:  CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: The NVD and the CNA have provided the same score. When this occurs only the CNA information is displayed, but the Acceptance Level icon for the CNA is given a checkmark to signify NVD concurrence.

CVSS 2.0 Severity and Metrics:

NIST: NVD

Base Score:  4.6 MEDIUM

Vector:  (AV:L/AC:L/Au:N/C:P/I:P/A:P)

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://kb.juniper.net/JSA11262	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-668	Exposure of Resource to Wrong Sphere	NIST
CWE-642	External Control of Critical State Data	Juniper Networks, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

1 change records found show changes

Initial Analysis by NIST 1/28/2022 2:53:11 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		Record truncated, showing 500 of 14651 characters. View Entire Change Record OR *cpe:2.3:o:juniper:junos:16.1:r1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:16.1:r2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:16.1:r3:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:16.1:r3-s10:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:16.1:r3-s11:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:16.1:r3-s8:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:16.1:r4:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:16.1:r4-s12:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:16.1:r4-s2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos
Added	CVSS V2		NIST (AV:L/AC:L/Au:N/C:P/I:P/A:P)
Added	CVSS V3.1		NIST AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added	CWE		NIST CWE-668
Changed	Reference Type	https://kb.juniper.net/JSA11262 No Types Assigned	https://kb.juniper.net/JSA11262 Vendor Advisory