CVE-2024-30388 Junos OS: QFX5000 Series and EX Series: Specific malformed LACP packets will cause flaps
An unauthenticated adjacent attacker can cause a denial of service by sending malformed LACP packets to Juniper QFX5000 and EX Series switches.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-30388?
CVE-2024-30388 is a high-severity denial of service vulnerability in Juniper Junos, published on 12 Apr 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An Improper Isolation or Compartmentalization vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on QFX5000 Series and EX Series allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).
If a specific malformed LACP packet is received by a QFX5000 Series, or an EX4400, EX4100 or EX4650 Series device, an LACP flap will occur resulting in traffic loss. This issue affects Junos OS on QFX5000 Series, and on EX4400, EX4100 or EX4650 Series:
* 20.4 versions from
20.4R3-S4
before 20.4R3-S8, * 21.2 versions from
21.2R3-S2
before 21.2R3-S6, * 21.4 versions from
21.4R2
before 21.4R3-S4,
* 22.1 versions from
22.1R2
before 22.1R3-S3, * 22.2 versions before 22.2R3-S1, * 22.3 versions before 22.3R2-S2, 22.3R3, * 22.4 versions before 22.4R2-S1, 22.4R3.
Weakness: CWE-653
Which versions are affected by CVE-2024-30388?
It affects 1 product.
Products include Juniper Junos.
How do I fix CVE-2024-30388?
No fix has been published for CVE-2024-30388 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-30388 being exploited?
There is no known exploitation of CVE-2024-30388 in the wild and no public exploit code.
Other vulnerabilities in Juniper Junos
- CVE-2023-36845 Juniper Junos OS EX Series and SRX Series PHP External Variable Modification
- CVE-2020-1631 Juniper Junos OS Path Traversal
- CVE-2025-21590 Juniper Junos OS Improper Isolation or Compartmentalization
- CVE-2023-36851 Juniper Junos OS SRX Series Missing Authentication for Critical Function
- CVE-2023-36844 Juniper Junos OS EX Series PHP External Variable Modification
Sources
Also known as GHSA-fwcw-wmg8-r4vq.