CVE-2024-39560

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 kernel memory' command as shown below:

user@router> show system kernel memory    
Real memory total/reserved: 4130268/ 133344 Kbytes
kmem map free: 18014398509110220 Kbytes

This issue affects:
Junos OS:


  *  All versions before 20.4R3-S9,
  *  All versions of 21.2,
  *  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.