CVE-2024-21599: Junos OS: MX Series: MPC3E memory leak with PTP configuration
First published: Fri Jan 12 2024(Updated: )
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.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Juniper Junos | =20.4 | |
| Juniper Junos | =20.4-r1 | |
| Juniper Junos | =20.4-r1-s1 | |
| Juniper Junos | =20.4-r2 | |
| Juniper Junos | =20.4-r2-s1 | |
| Juniper Junos | =20.4-r2-s2 | |
| Juniper Junos | =20.4-r3 | |
| Juniper Junos | =20.4-r3-s1 | |
| Juniper Junos | =20.4-r3-s2 | |
| Juniper Junos | =21.1 | |
| Juniper Junos | =21.1-r1 | |
| Juniper Junos | =21.1-r1-s1 | |
| Juniper Junos | =21.1-r2 | |
| Juniper Junos | =21.1-r2-s1 | |
| Juniper Junos | =21.1-r2-s2 | |
| Juniper Junos | =21.1-r3 | |
| Juniper Junos | =21.1-r3-s1 | |
| Juniper Junos | =21.1-r3-s2 | |
| Juniper Junos | =21.1-r3-s3 | |
| Juniper Junos | =21.2 | |
| Juniper Junos | =21.2-r1 | |
| Juniper Junos | =21.2-r1-s1 | |
| Juniper Junos | =21.2-r1-s2 | |
| Juniper Junos | =21.2-r2 | |
| Juniper Junos | =21.2-r2-s1 | |
| Juniper Junos | =21.2-r2-s2 | |
| Juniper Junos | =21.3 | |
| Juniper Junos | =21.3-r1 | |
| Juniper Junos | =21.3-r1-s1 | |
| Juniper Junos | =21.3-r1-s2 | |
| Juniper Junos | =21.3-r2 | |
| Juniper Junos | =21.4 | |
| Juniper Junos | =21.4-r1 | |
| Juniper Junos | =21.4-r1-s1 | |
| Juniper Junos | =21.4-r1-s2 | |
| Juniper Junos | =22.1 | |
| Juniper Junos | =22.1-r1 | |
| Juniper Junos | =22.1-r1-s1 | |
| Juniper Junos | =22.1-r1-s2 |
Remedy
The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S3, 21.1R3-S4, 21.2R3, 21.3R2-S1, 21.3R3, 21.4R2, 22.1R2, 22.2R1, and all subsequent releases.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-21599?
CVE-2024-21599 has a moderate severity rating, as it can cause a Denial of Service (DoS).
How do I fix CVE-2024-21599?
To remediate CVE-2024-21599, upgrade to a patched version of Junos OS that addresses this vulnerability.
Which versions of Junos OS are affected by CVE-2024-21599?
CVE-2024-21599 affects Junos OS versions 20.4, 21.1, 21.2, 21.3, 21.4, and 22.1.
What is the attack vector for CVE-2024-21599?
The attack vector for CVE-2024-21599 involves receiving specific PTP packets from an adjacent, unauthenticated attacker.
What can an attacker achieve with CVE-2024-21599?
An attacker exploiting CVE-2024-21599 can cause a Denial of Service (DoS) on affected devices.
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