Denial of service in Junos OS on MX Series with SPC3 line card

1) Missing release of memory after effective lifetime

EUVDB-ID: #VU94357

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-2024-39550

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

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 - 23.2R2-S1

External links

http://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

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.