CVE-2022-22237

Junos OS: Peers not configured for TCP-AO can establish a BGP or LDP session even if authentication is configured locally

MEDIUM

6.5

CVSS Score

Published: October 18, 2022 at 02:46 AM UTC

Updated: June 17, 2026 at 04:28 AM UTC

1 product affected across 1 vendorJunos

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Severity

MEDIUM6.5

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

Description

An Improper Authentication vulnerability in the kernel of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause an impact on confidentiality or integrity. A vulnerability in the processing of TCP-AO will allow a BGP or LDP peer not configured with authentication to establish a session even if the peer is locally configured to use authentication. This could lead to untrusted or unauthorized sessions being established. This issue affects Juniper Networks Junos OS: 21.2 versions prior to 21.2R3-S1; 21.3 versions prior to 21.3R2-S2, 21.3R3; 21.4 versions prior to 21.4R2-S1, 21.4R3; 22.1 versions prior to 22.1R1-S1, 22.1R2. This issue does not affect Juniper Networks Junos OS Evolved.

Affected

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

Junos · Juniper Networks

95%

21.2 ≤ v < 21.2R3-S121.3 ≤ v < 21.3R2-S2, 21.3R321.4 ≤ v < 21.4R2-S1, 21.4R322.1 ≤ v < 22.1R1-S1, 22.1R221.2 21.2 r1 21.2 r1-s1 21.2 r1-s2 21.2 r2 21.2 r2-s1 21.2 r2-s2 21.2 r3 21.3 21.3 r1 21.3 r1-s1 21.3 r1-s2 21.3 r2 21.3 r2-s1 21.4 21.4 r1 21.4 r1-s1 21.4 r1-s2 21.4 r2 22.1 22.1 r1

Vendor states this is fixed in 21.2R1 (unaffected)

Affected range stops below 21.2R3-S1, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.3R2-S2, 21.3R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.4R2-S1, 21.4R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.1R1-S1, 22.1R2, 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/JSA69893

References (1)

Vendor Advisory

Source: [email protected]

https://kb.juniper.net/JSA69893

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMjuniper

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

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-287

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