CVE-2024-21617

published 2024-01-12

CVE-2024-21617: An Incomplete Cleanup vulnerability in Nonstop active routing (NSR) component of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker to…

Priority P4 29 medium 6.5 CVSS 3.1

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

An Incomplete Cleanup vulnerability in Nonstop active routing (NSR) component of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker to cause memory leak leading to Denial of Service (DoS).

On all Junos OS platforms, when NSR is enabled, a BGP flap will cause memory leak. A manual reboot of the system will restore the services.

Note: NSR is not supported on the SRX Series and is therefore not affected by this vulnerability.
The memory usage can be monitored using the below commands.

user@host> show chassis routing-engine no-forwarding
user@host> show system memory | no-more
This issue affects:

Juniper Networks Junos OS

* 21.2 versions earlier than 21.2R3-S5;
* 21.3 versions earlier than 21.3R3-S4;
* 21.4 versions earlier than 21.4R3-S4;
* 22.1 versions earlier than 22.1R3-S2;
* 22.2 versions earlier than 22.2R3-S2;
* 22.3 versions earlier than 22.3R2-S1, 22.3R3;
* 22.4 versions earlier than 22.4R1-S2, 22.4R2.

This issue does not affect Junos OS versions earlier than 20.4R3-S7.

Affected

16 ranges

Vendor	Product	Version range	Fixed in
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos_os	—	—
juniper	srx_series	—	—
juniper_networks	junos_os	>= 21.2 < 21.2R3-S5	21.2R3-S5
juniper_networks	junos_os	>= 21.3 < 21.3R3-S4	21.3R3-S4
juniper_networks	junos_os	>= 21.4 < 21.4R3-S4	21.4R3-S4
juniper_networks	junos_os	>= 22.1 < 22.1R3-S2	22.1R3-S2
juniper_networks	junos_os	>= 22.2 < 22.2R3-S2	22.2R3-S2
juniper_networks	junos_os	>= 22.3 < 22.3R2-S1, 22.3R3	22.3R2-S1, 22.3R3
juniper_networks	junos_os	>= 22.4 < 22.4R1-S2, 22.4R2	22.4R1-S2, 22.4R2

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CWE-459