#VU94333 Memory leak in Junos OS Evolved - CVE-2024-39557

Vulnerability identifier: #VU94333

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-39557

CWE-ID: CWE-401

Exploitation vector: Local network

Exploit availability: No

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

Vendor: Juniper Networks, Inc.

Description
The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak in the Layer 2 Address Learning Daemon (l2ald) when performing MAC table updates. A remote attacker on the local network can force the daemon to leak memory and perform denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: 21.4R1-EVO - 21.4R3-S7-EVO, 22.2-EVO - 22.2R3-S3-EVO, 22.3R1-EVO - 22.3R3-S2-EVO, 22.4R1-EVO - 22.4R2-S2-EVO, 23.2R1-EVO - 23.2R1-S2-EVO

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External links
https://supportportal.juniper.net/JSA83017

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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.