CVE-2024-21616

published 2024-01-12

CVE-2024-21616: An Improper Validation of Syntactic Correctness of Input vulnerability in Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an…

Priority P3 45 high 7.5 CVSS 3.1

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

An Improper Validation of Syntactic Correctness of Input vulnerability in Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause Denial of Service (DoS).

On all Junos OS MX Series and SRX Series platforms, when SIP ALG is enabled, and a specific SIP packet is received and processed, NAT IP allocation fails for genuine traffic, which causes Denial of Service (DoS). Continuous receipt of this specific SIP ALG packet will cause a sustained DoS condition.

NAT IP usage can be monitored by running the following command.

user@srx> show security nat resource-usage source-pool

Pool name: source_pool_name
..
Address Factor-index Port-range Used Avail Total Usage
X.X.X.X
0 Single Ports 50258 52342 62464 96% <<<<<
- Alg Ports 0 2048 2048 0%
This issue affects:

Juniper Networks Junos OS on MX Series and SRX Series

* All versions earlier than 21.2R3-S6;
* 21.3 versions earlier than 21.3R3-S5;
* 21.4 versions earlier than 21.4R3-S5;
* 22.1 versions earlier than 22.1R3-S4;
* 22.2 versions earlier than 22.2R3-S3;
* 22.3 versions earlier than 22.3R3-S1;
* 22.4 versions earlier than 22.4R2-S2, 22.4R3;
* 23.2 versions earlier than 23.2R1-S1, 23.2R2.

Affected

20 ranges

Vendor	Product	Version range	Fixed in
juniper	ex_series	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos_os	—	—
juniper	mx_series	—	—
juniper	srx_series	—	—
juniper_networks	junos_os	< 21.2R3-S6	21.2R3-S6
juniper_networks	junos_os	>= 21.3 < 21.3R3-S5	21.3R3-S5
juniper_networks	junos_os	>= 21.4 < 21.4R3-S5	21.4R3-S5
juniper_networks	junos_os	>= 22.1 < 22.1R3-S4	22.1R3-S4
juniper_networks	junos_os	>= 22.2 < 22.2R3-S3	22.2R3-S3
juniper_networks	junos_os	>= 22.3 < 22.3R3-S1	22.3R3-S1
juniper_networks	junos_os	>= 22.4 < 22.4R2-S2, 22.4R3	22.4R2-S2, 22.4R3
juniper_networks	junos_os	>= 23.2 < 23.2R1-S1, 23.2R2	23.2R1-S1, 23.2R2

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CWE-1286