Description
An Improper Following of Specification by Caller vulnerability in web management (J-Web, Captive Portal, 802.1X, Juniper Secure Connect (JSC) of Juniper Networks Junos OS on SRX Series, EX Series, MX240, MX480, MX960, QFX5120 Series, allows an unauthenticated, network-based attacker, sending genuine traffic targeted to the device to cause the CPU to climb until the device becomes unresponsive. Continuous receipt of these packets will create a sustained Denial of Service (DoS) condition. This issue affects Junos OS: * All versions before 21.4R3-S9, * from 22.2 before 22.2R3-S5, * from 22.4 before 22.4R3-S4, * from 23.2 before 23.2R2-S3, * from 23.4 before 23.4R2-S3, * from 24.2 before 24.2R1-S1, 24.2R2. An indicator of compromise is to review the CPU % of the httpd process in the CLI: e.g. show system processes extensive | match httpd PID nobody 52 0 20M 191M select 2 0:01 80.00% httpd{httpd} <<<<< the percentage of httpd usage if high may be an indicator
Problem types
573 - Improper Following of Specification by Caller
Product status
Any version before 21.4R3-S9
22.2 (semver) before 22.2R3-S5
22.4 (semver) before 22.4R3-S4
23.2 (semver) before 23.2R2-S3
23.4 (semver) before 23.4R2-S3
24.2 (semver) before 24.2R1-S1, 24.2R2
Timeline
| 2025-04-09: | Initial Publication |
Credits
Alexander Zielke with VegaSystems GmbH & Co. KG
References
supportportal.juniper.net/JSA96452