CVE-2024-39519: Junos OS Evolved: ACX 7000 Series: Multicast traffic is looped in a multihoming EVPN MPLS scenario
First published: Thu Jul 11 2024(Updated: )
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.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| Any of | ||
| Juniper Networks Junos OS Evolved | >=22.2<22.4 | |
| Juniper Networks Junos OS Evolved | =22.4 | |
| Juniper Networks Junos OS Evolved | =22.4-r1 | |
| Juniper Networks Junos OS Evolved | =22.4-r1-s1 | |
| Juniper Networks Junos OS Evolved | =22.4-r1-s2 | |
| Any of | ||
| Juniper Acx7024 | ||
| Juniper Acx7024x | ||
| Juniper Acx7100-32c | ||
| Juniper Acx7100-48l | ||
| Juniper Acx7332 | ||
| Juniper Acx7348 | ||
| Juniper Acx7509 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-39519?
CVE-2024-39519 has a severity rating that allows an unauthenticated attacker to exploit it and cause a Denial-of-Service (DoS).
How do I fix CVE-2024-39519?
To fix CVE-2024-39519, update your Junos OS Evolved software to a version that is not affected by this vulnerability.
Which versions of Junos OS Evolved are affected by CVE-2024-39519?
CVE-2024-39519 affects Junos OS Evolved versions 22.2 to 22.4, including specific releases within that range.
What platforms are impacted by CVE-2024-39519?
CVE-2024-39519 primarily impacts the ACX7000 Series platforms running the vulnerable versions of Junos OS Evolved.
Can CVE-2024-39519 be exploited remotely?
No, CVE-2024-39519 requires an adjacent attacker to exploit the vulnerability.
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- version/juniper networks junos os evolved/22.4-r1-s1
- version/juniper networks junos os evolved/22.4-r1-s2
- canonical/juniper acx7024
- canonical/juniper acx7024x
- canonical/juniper acx7100-32c
- canonical/juniper acx7100-48l
- canonical/juniper acx7332
- canonical/juniper acx7348
- canonical/juniper acx7509