CVE-2024-39517

6.5 · MEDIUM

Published Jul 10, 2024 juniper CWE-754 EPSS 0.25% (16th pctl) CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-39517 is a medium-severity vulnerability affecting juniper junos. It was published on July 10, 2024 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Layer 2 Address Learning Daemon (l2ald) on Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause Denial of Service (DoS).

In an EVPN/VXLAN scenario, when a high amount specific Layer 2 packets are processed by the device, it can cause the Routing Protocol Daemon (rpd) to utilize all CPU resources which causes the device to hang. A manual restart of the rpd is required to restore services.

This issue affects both IPv4 and IPv6 implementations.

This issue affects

Junos OS:

All versions earlier than 21.4R3-S7;

22.1 versions earlier than 22.1R3-S5;

22.2 versions earlier than 22.2R3-S3;

22.3 versions earlier than 22.3R3-S3;

22.4 versions earlier than 22.4R3-S2;

23.2 versions earlier than 23.2R2;

23.4 versions earlier than 23.4R1-S1.

Junos OS Evolved:

All versions earlier than 21.4R3-S7-EVO;

22.1-EVO versions earlier than 22.1R3-S5-EVO;

22.2-EVO versions earlier than

Remediation

Check the references section for vendor advisories and patches from juniper. Update junos 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	>= 0, < 21.4	Affected
juniper	junos_os_evolved	>= 0, < 21.4	Affected

References

Ref supportportal.juniper.net/JSA79175 Ref supportportal.juniper.net/JSA79175

Frequently Asked Questions

What is CVE-2024-39517?

CVE-2024-39517 is a medium-severity vulnerability affecting juniper junos. It was published on July 10, 2024 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2024-39517?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-39517?

How can CyberStrike help with CVE-2024-39517?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-39517 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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