Vulnerability identifier: #VU88456

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-30388

CWE-ID: CWE-653

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Juniper Junos OS
Operating systems & Components / Operating system

Vendor: Juniper Networks, Inc.

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper isolation or compartmentalization error in the Packet Forwarding Engine (pfe). A remote non-authenticated attacker can cause a Denial of Service (DoS).

If a specific malformed LACP packet is received by a QFX5000 Series, or an EX4100 Series , EX4400 Series or EX4650 Series device, an LACP flap will occur resulting in traffic loss.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 20.4R1 - 20.4R3-S7, 21.2R1 - 21.2R3-S5, 21.3R1 - 21.3R3-S4, 21.4R1 - 21.4R3-S3, 22.1R1 - 22.1R3-S2, 22.2R1 - 22.2R2-S2, 22.3R1 - 22.3R2-S1, 22.4R1 - 22.4R1-S2, 23.2R1-S1, 23.2R1-S2

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External links
http://supportportal.juniper.net/s/article/2024-04-Security-Bulletin-Junos-OS-QFX5000-Series-and-EX-Series-Specific-malformed-LACP-packets-will-cause-flaps-CVE-2024-30388

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.