title: Junos OS: Peers not configured for TCP-AO can establish a BGP or LDP session even if authentication is configured locally
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.
problem types: CWE-287 Improper Authentication
affected:
{
vendor: Juniper Networks
product: Junos OS
versions:
version: unspecified, lessThan: 21.2R1, status: unaffected, versionType: custom
version: 21.2, status: affected, lessThan: 21.2R3-S1, versionType: custom
version: 21.3, status: affected, lessThan: 21.3R2-S2, 21.3R3, versionType: custom
version: 21.4, status: affected, lessThan: 21.4R2-S1, 21.4R3, versionType: custom
version: 22.1, status: affected, lessThan: 22.1R1-S1, 22.1R2, versionType: custom
}
metrics:
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: LOW
integrityImpact: LOW
availabilityImpact: NONE
baseScore: 6.5
baseSeverity: MEDIUM
]
exploits: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
solutions: The following software releases have been updated to resolve this specific issue: 21.2R3-S1, 21.3R2-S2, 21.3R3, 21.4R2-S1, 21.4R3, 22.1R1-S1, 22.1R2, 22.2R1, and all subsequent releases.
workarounds: There are no viable workarounds for this issue.