CVE-2024-39550 Information

Description

A Missing Release of Memory after Effective Lifetime vulnerability in the rtlogd process of Juniper Networks Junos OS on MX Series with SPC3 allows an unauthenticated adjacent attacker to 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).

Memory can only be recovered by manually restarting rtlogd process.  The memory usage can be monitored using the below command.

user@host> show system processes extensive | match rtlog 

This issue affects Junos OS on MX Series with SPC3 line card: 

from 21.2R3 before 21.2R3-S8 
from 21.4R2 before 21.4R3-S6 
from 22.1 before 22.1R3-S5 
from 22.2 before 22.2R3-S3 
from 22.3 before 22.3R3-S2 
from 22.4 before 22.4R3-S1 
from 23.2 before 23.2R2 
from 23.4 before 23.4R2.

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://supportportal.juniper.net/JSA83012

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5