An Improper Validation of Array Index vulnerability in the Advanced Forwarding Toolkit Manager daemon (aftmand) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).
 

On the PTX10008 and PTX10016 platforms running Junos OS or Junos OS Evolved, when a specific SNMP MIB is queried this will cause a PFE crash and the FPC will go offline and not automatically recover. A system restart is required to get the affected FPC in an operational state again.
 

This issue affects:

Juniper Networks Junos OS

• 22.1 version 22.1R2 and later versions;
• 22.1 versions prior to 22.1R3;
• 22.2 versions prior to 22.2R2.

Juniper Networks Junos OS Evolved

• 21.3-EVO version 21.3R3-EVO and later versions;
• 21.4-EVO version 21.4R1-S2-EVO, 21.4R2-EVO and later versions prior to 21.4R2-S1-EVO;
• 22.1-EVO version 22.1R2-EVO and later versions prior to 22.1R3-EVO;
• 22.2-EVO versions prior to 22.2R1-S1-EVO, 22.2R2-EVO.

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-2023-22401.

The following software releases have been updated to resolve this specific issue:

Junos OS: 22.1R3, 22.2R2, and all subsequent releases.

Junos OS Evolved: 21.4R2-S1-EVO, 22.1R3-EVO, 22.2R1-S1-EVO, 22.2R2-EVO, and all subsequent releases.

This issue is being tracked as 1668861.

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

• 2023-01-11: Initial Publication

• 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-2023-22401 at cve.mitre.org