#VU94357 Missing release of memory after effective lifetime in Juniper Junos OS - CVE-2024-39550

Vulnerability identifier: #VU94357

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-2024-39550

CWE-ID: CWE-401

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 missing release of memory after effective lifetime error in the rtlogd process. A remote non-authenticated attacker can trigger internal events cause (which can be done by repeated port flaps) to cause a slow memory leak, ultimately leading to a Denial of Service (DoS).

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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

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External links
https://supportportal.juniper.net/s/article/2024-07-Security-Bulletin-Junos-OS-MX-Series-with-SPC3-line-card-Port-flaps-causes-rtlogd-memory-leak-leading-to-Denial-of-Service-CVE-2024-39550

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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.