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.

To be exposed to this vulnerability the device needs to have TCP-AO configured for at least one of BGP or LDP:

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was found during internal product security testing or research.

This issue has been assigned CVE-2022-22237.

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.

This issue is being tracked as PR 1637928 which is visible on the Customer Support website.

Note: Juniper SIRT's policy  is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).

IMPLEMENTATION:

Software Releases, patches and updates are available at https://support.juniper.net/support/downloads/.

• KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process [juniper.net]
• KB16765: In which releases are vulnerabilities fixed? [juniper.net]
• KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories [juniper.net]
• Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team
• CVE-2022-22237 at cve.mitre.org