CVE-2024-39513

5.5 · MEDIUM

Published Jul 10, 2024 juniper CWE-20 EPSS 0.14% (4th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-39513 is a medium-severity vulnerability affecting juniper junos_os_evolved. It was published on July 10, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical Description

An Improper Input Validation vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved allows a local, low-privileged attacker to cause a Denial of Service (DoS).

When a specific "clear" command is run, the Advanced Forwarding Toolkit manager (evo-aftmand-bt or evo-aftmand-zx) crashes and restarts.

The crash impacts all traffic going through the FPCs, causing a DoS. Running the command repeatedly leads to a sustained DoS condition.

This issue affects Junos OS Evolved:

* All versions before 20.4R3-S9-EVO,

* from 21.2-EVO before 21.2R3-S7-EVO,

* from 21.3-EVO before 21.3R3-S5-EVO,

* from 21.4-EVO before 21.4R3-S6-EVO,

* from 22.1-EVO before 22.1R3-S4-EVO,

* from 22.2-EVO before 22.2R3-S3-EVO,

* from 22.3-EVO before 22.3R3-S3-EVO,

* from 22.4-EVO before 22.4R3-EVO,

* from 23.2-EVO before 23.2R2-EVO.

Remediation

Check the references section for vendor advisories and patches from juniper. Update junos_os_evolved to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

Vendor	Product	Versions	Status
juniper	junos_os_evolved	>= 0, < 20.4	Affected

References

Ref supportportal.juniper.net/JSA82978 Ref supportportal.juniper.net/JSA82978

Frequently Asked Questions

What is CVE-2024-39513?

CVE-2024-39513 is a medium-severity vulnerability affecting juniper junos_os_evolved. It was published on July 10, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-39513?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-39513?

How can CyberStrike help with CVE-2024-39513?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-39513 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

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