6.5
MEDIUM
CVE-2024-39519
Juniper Networks Junos OS Evolved ACX7000 Series Multicast Looping Denial of Service
Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved on ACX7000 Series allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS). On all ACX 7000 Series platforms running Junos OS Evolved, and configured with IRBs, if a Customer Edge device (CE) device is dual homed to two Provider Edge devices (PE) a traffic loop will occur when the CE sends multicast packets. This issue can be triggered by IPv4 and IPv6 traffic. This issue affects Junos OS Evolved:  All versions from 22.2R1-EVO and later versions before 22.4R2-EVO, This issue does not affect Junos OS Evolved versions before 22.1R1-EVO.

INFO

Published Date :

July 11, 2024, 4:15 p.m.

Last Modified :

Sept. 23, 2024, 2:21 p.m.

Remotely Exploitable :

No

Impact Score :

3.6

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2024-39519 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Juniper junos_os_evolved
2 Juniper acx7024
3 Juniper acx7024x
4 Juniper acx7100-32c
5 Juniper acx7100-48l
6 Juniper acx7332
7 Juniper acx7348
8 Juniper acx7509
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2024-39519.

URL Resource
https://supportportal.juniper.net/JSA82983 Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2024-39519 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2024-39519 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Sep. 23, 2024

    Action Type Old Value New Value
    Changed Reference Type https://supportportal.juniper.net/JSA82983 No Types Assigned https://supportportal.juniper.net/JSA82983 Vendor Advisory
    Added CWE NIST CWE-754
    Added CPE Configuration AND OR *cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:* versions from (including) 22.2 up to (excluding) 22.4 *cpe:2.3:o:juniper:junos_os_evolved:22.4:-:*:*:*:*:*:* *cpe:2.3:o:juniper:junos_os_evolved:22.4:r1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos_os_evolved:22.4:r1-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos_os_evolved:22.4:r1-s2:*:*:*:*:*:* OR cpe:2.3:h:juniper:acx7024:-:*:*:*:*:*:*:* cpe:2.3:h:juniper:acx7024x:-:*:*:*:*:*:*:* cpe:2.3:h:juniper:acx7100-32c:-:*:*:*:*:*:*:* cpe:2.3:h:juniper:acx7100-48l:-:*:*:*:*:*:*:* cpe:2.3:h:juniper:acx7332:-:*:*:*:*:*:*:* cpe:2.3:h:juniper:acx7348:-:*:*:*:*:*:*:* cpe:2.3:h:juniper:acx7509:-:*:*:*:*:*:*:*
  • CVE Received by [email protected]

    Jul. 11, 2024

    Action Type Old Value New Value
    Added Description An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved on ACX7000 Series allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS). On all ACX 7000 Series platforms running Junos OS Evolved, and configured with IRBs, if a Customer Edge device (CE) device is dual homed to two Provider Edge devices (PE) a traffic loop will occur when the CE sends multicast packets. This issue can be triggered by IPv4 and IPv6 traffic. This issue affects Junos OS Evolved:  All versions from 22.2R1-EVO and later versions before 22.4R2-EVO, This issue does not affect Junos OS Evolved versions before 22.1R1-EVO.
    Added Reference Juniper Networks, Inc. https://supportportal.juniper.net/JSA82983 [No types assigned]
    Added CWE Juniper Networks, Inc. CWE-754
    Added CVSS V3.1 Juniper Networks, Inc. AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Added CVSS V4.0 Juniper Networks, Inc. CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2024-39519 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2024-39519 weaknesses.

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability