CVE-2024-39560 Information

Description

An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a logically adjacent downstream RSVP neighbor to cause kernel memory exhaustion leading to a kernel crash resulting in a Denial of Service (DoS).

The kernel memory leak and eventual crash will be seen when the downstream RSVP neighbor has a persistent error which will not be corrected.

System kernel memory can be monitored through the use of the ‘show system statistics kernel memory’ command as shown below:

user@router> show system statistics kernel memory Memory               Size (kB) Percentage When   Active                 753092     18.4% Now   Inactive               574300     14.0% Now   Wired                  443236     10.8% Now   Cached                1911204     46.6% Now   Buf                     32768      0.8% Now   Free                   385072      9.4% Now Kernel Memory                             Now   Data                   312908      7.6% Now   Text                     2560      0.1% Now …

This issue affects: Junos OS:

All versions before 20.4R3-S9
from 21.4 before 21.4R3-S5
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
from 23.2 before 23.2R2;

Junos OS Evolved:

All versions before 21.4R3-S5-EVO
from 22.1-EVO before 22.1R3-S5-EVO 
from 22.2-EVO before 22.2R3-S3-EVO 
from 22.3-EVO before 22.3R3-S2-EVO 
from 22.4-EVO before 22.4R3-EVO 
from 23.2-EVO before 23.2R2-EVO.

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/JSA83020

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