Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Adjacent_network
0

CVE-2024-21599

Disclosure Date: January 12, 2024
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).

If an MX Series device receives PTP packets on an MPC3E that doesn’t support PTP this causes a memory leak which will result in unpredictable behavior and ultimately in an MPC crash and restart.

To monitor for this issue, please use the following FPC vty level commands:

show heap
shows an increase in “LAN buffer” utilization and

show clksync ptp nbr-upd-info
shows non-zero “Pending PFEs” counter.

This issue affects Juniper Networks Junos OS on MX Series with MPC3E:

  • All versions earlier than 20.4R3-S3;
  • 21.1 versions earlier than 21.1R3-S4;
  • 21.2 versions earlier than 21.2R3;
  • 21.3 versions earlier than 21.3R2-S1, 21.3R3;
  • 21.4 versions earlier than 21.4R2;
  • 22.1 versions earlier than 22.1R2.

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CVSS V3 Severity and Metrics
Base Score:
6.5 Medium
Impact Score:
3.6
Exploitability Score:
2.8
Vector:
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector (AV):
Adjacent_network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
High

General Information

Vendors

  • juniper

Products

  • junos 20.4,
  • junos 21.1,
  • junos 21.2,
  • junos 21.3,
  • junos 21.4,
  • junos 22.1

Additional Info

Technical Analysis