Vulnerability identifier: #VU88487

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-2024-30386

CWE-ID: CWE-416

Exploitation vector: Local network

Exploit availability: No

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

Vendor: Juniper Networks, Inc.

Description

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

The vulnerability exists due to a use-after-free error in l2ald. A remote attacker on the local network can send specially crafted data to the device and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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

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

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External links
http://supportportal.juniper.net/s/article/2024-04-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-In-a-EVPN-VXLAN-scenario-state-changes-on-adjacent-systems-can-cause-an-l2ald-process-crash-CVE-2024-30386

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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.