PT-2024-1130 · Juniper Networks · Junos

Published 2024-01-10 · Updated 2024-01-19 · CVE-2024-21599

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Juniper Networks Junos OS on MX Series versions earlier than 20.4R3-S3 Juniper Networks Junos OS on MX Series version 21.1 versions earlier than 21.1R3-S4 Juniper Networks Junos OS on MX Series version 21.2 versions earlier than 21.2R3 Juniper Networks Junos OS on MX Series version 21.3 versions earlier than 21.3R2-S1, 21.3R3 Juniper Networks Junos OS on MX Series version 21.4 versions earlier than 21.4R2 Juniper Networks Junos OS on MX Series version 22.1 versions earlier than 22.1R2

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, use the following FPC vty level commands: "show heap" to check for an increase in "LAN buffer" utilization and "show clksync ptp nbr-upd-info" to check for a non-zero "Pending PFEs" counter.

Recommendations For versions earlier than 20.4R3-S3, update to version 20.4R3-S3 or later. For version 21.1, update to version 21.1R3-S4 or later. For version 21.2, update to version 21.2R3 or later. For version 21.3, update to version 21.3R2-S1 or 21.3R3 or later. For version 21.4, update to version 21.4R2 or later. For version 22.1, update to version 22.1R2 or later. As a temporary workaround, consider restricting the reception of PTP packets on MPC3E devices that do not support PTP to minimize the risk of exploitation.

Fix

DoS

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

BDU:2024-00443

CVE-2024-21599

Affected Products

Junos

References · 8

• https://bdu.fstec.ru/vul/2024-00443 · Security Note
• https://supportportal.juniper.net/JSA75740 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2024-21599 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-21599 · Security Note
• https://first.org/cvss/calculator/4.0#CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L · Note
• https://vuldb.com/it/?id.250508 · Note
• https://cybersecurity-help.cz/vdb/SB2024011120 · Note
• https://t.me/cvenotify/68083 · Telegram Post