Juniper Junos OS: 2024-07 Security Bulletin: Junos OS and Junos OS Evolved: Memory leak due to RSVP neighbor persistent error leading to kernel crash (JSA83020) (CVE-2024-39560)

Juniper Junos OS: 2024-07 Security Bulletin: Junos OS and Junos OS Evolved: Memory leak due to RSVP neighbor persistent error leading to kernel crash (JSA83020) (CVE-2024-39560)

Severity

6

CVSS

(AV:A/AC:L/Au:N/C:N/I:N/A:C)

Published

07/10/2024

Created

07/12/2024

Added

07/11/2024

Modified

01/30/2025

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 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.

Solution(s)

• juniper-junos-os-upgrade-latest

References

• https://attackerkb.com/topics/cve-2024-39560
• CVE - 2024-39560
• JSA83020