CVE-2024-39536

5.3 · MEDIUM

Published Jul 11, 2024 juniper CWE-401 EPSS 0.23% (13th pctl) CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-39536 is a medium-severity vulnerability affecting juniper junos. It was published on July 11, 2024 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical Description

A Missing Release of Memory after Effective Lifetime vulnerability in the Periodic Packet Management Daemon (ppmd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause a

Denial-of-Service (DoS).

When a BFD session configured with authentication flaps, ppmd memory can leak. Whether the leak happens depends on a race condition which is outside the attackers control. This issue only affects BFD operating in distributed aka delegated (which is the default behavior) or inline mode.

Whether the leak occurs can be monitored with the following CLI command:

> show ppm request-queue

FPC Pending-request

fpc0 2

request-total-pending: 2

where a continuously increasing number of pending requests is indicative of the leak.

This issue affects:

Junos OS:

* All versions before 21.2R3-S8,

* 21.4 versions before 21.4R3-S7,

* 22.1 versions before 22.1R3-S4,

* 22.2 versions before 22.2R3-S4,

* 22.

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, < 21.2	Affected
juniper	junos_os_evolved	>= 0, < 21.2	Affected

References

Ref supportportal.juniper.net/JSA82996 Ref supportportal.juniper.net/JSA82996

Frequently Asked Questions

What is CVE-2024-39536?

CVE-2024-39536 is a medium-severity vulnerability affecting juniper junos. It was published on July 11, 2024 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2024-39536?

This vulnerability has a CVSS 3.1 base score of 5.3, 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-2024-39536?

How can CyberStrike help with CVE-2024-39536?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-39536 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.

How CyberStrike Helps

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HackBrowser

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