# CVE-2024-39564: Junos OS and Junos OS Evolved: Receipt of malformed BGP path attributes leads to RPD crash

> An attacker can cause a denial of service by sending malformed BGP updates that trigger a double-free crash in the routing daemon.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:U`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Feb 2025
- **Updated:** 26 Feb 2025
- **Also known as:** GHSA-6chq-9qg2-rx7f

## What is CVE-2024-39564?

CVE-2024-39564 is a high-severity use after free vulnerability in Juniper Junos, published on 5 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

This is a similar, but different vulnerability than the issue reported as CVE-2024-39549.

A double-free vulnerability in the routing process daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker to send a malformed BGP Path attribute update which allocates memory used to log the bad path attribute. This double free of memory is causing an rpd crash, leading to a Denial of Service (DoS).

This issue affects:

Junos OS:   *  from 22.4 before 22.4R3-S4.

Junos OS Evolved:  *  from 22.4 before 22.4R3-S4-EVO.

Weakness: CWE-415 (Double Free)

## Which versions are affected by CVE-2024-39564?

It affects 2 products.


Products: Juniper Junos, Juniper Junos Os Evolved.

## How do I fix CVE-2024-39564?

No fix has been published for CVE-2024-39564 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-39564 being exploited?

There is no known exploitation of CVE-2024-39564 in the wild and no public exploit code.

## Other vulnerabilities in Juniper Junos

- [CVE-2023-36845](https://insights.sbomify.com/CVE-2023-36845/): Juniper Junos OS EX Series and SRX Series PHP External Variable Modification (critical 9.8, exploited in the wild)
- [CVE-2020-1631](https://insights.sbomify.com/CVE-2020-1631/): Juniper Junos OS Path Traversal (high 8.8, exploited in the wild)
- [CVE-2025-21590](https://insights.sbomify.com/CVE-2025-21590/): Juniper Junos OS Improper Isolation or Compartmentalization (medium 6.7, exploited in the wild)
- [CVE-2023-36851](https://insights.sbomify.com/CVE-2023-36851/): Juniper Junos OS SRX Series Missing Authentication for Critical Function (medium 5.3, exploited in the wild)
- [CVE-2023-36844](https://insights.sbomify.com/CVE-2023-36844/): Juniper Junos OS EX Series PHP External Variable Modification (medium 5.3, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-39564 and fix it if it is affected.

What it is: CVE-2024-39564 is a high-severity use after free vulnerability in Juniper Junos, published on 5 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-39564 in the wild and no public exploit code.

Affected product: Juniper Junos. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2024-39564/ (Markdown: https://insights.sbomify.com/CVE-2024-39564/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-39564
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-39564
- OSV: https://osv.dev/vulnerability/CVE-2024-39564

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-39564/
Summaries are generated and may contain mistakes; the official description above is the record.