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2022-01 Security Bulletin: Junos Fusion: A Satellite Device can be controlled by rewiring it to a foreign AD causing a DoS (CVE-2022-22154)

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Article ID: JSA11262 SECURITY_ADVISORIES Last Updated: 12 Jan 2022Version: 1.0
Product Affected:
This issue affects Junos OS 18.4, 19.1, 19.2.
Problem:

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.

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-2022-22154.

Solution:

The following software releases have been updated to resolve this specific issue: 18.4R3-S10, 19.1R3-S7, 19.2R3-S4, 19.3R1, and all subsequent releases.

This issue is being tracked as 1425509.

Workaround:
There are no viable workarounds for this issue other than ensuring that the wiring between the AD and the SD can't be tampered with.
Implementation:
Software releases or updates are available for download at https://support.juniper.net/support/downloads/
Modification History:
2022-01-12: Initial Publication.
CVSS Score:
6.8 (CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Severity Level:
Medium
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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