An Uncontrolled Resource Consumption vulnerability in the kernel of Juniper Networks JUNOS OS allows an unauthenticated network based attacker to cause 100% CPU load and the device to become unresponsive by sending a flood of traffic to the out-of-band management ethernet port. Continued receipted of a flood will create a sustained Denial of Service (DoS) condition. Once the flood subsides the system will recover by itself. An indication that the system is affected by this issue would be that kernel and netisr process are shown to be using a lot of CPU cycles like in the following example output: user@host> show system processes extensive ... PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND 16 root -72 - 0K 304K WAIT 1 839:40 88.96% intr{swi1: netisr 0} 0 root 97 - 0K 160K RUN 1 732:43 87.99% kernel{bcm560xgmac0 que} This issue affects Juniper Networks JUNOS OS on EX2300 Series, EX3400 Series, and ACX710: All versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S8, 18.4R3-S9; 19.1 versions prior to 19.1R3-S5; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R1-S4, 19.4R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R2-S1, 20.3R3; 20.4 versions prior to 20.4R2.
References
| Link | Resource |
|---|---|
| https://kb.juniper.net/JSA11230 | Vendor Advisory |
| https://kb.juniper.net/JSA11230 | Vendor Advisory |
Configurations
Configuration 1 (hide)
| AND |
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History
21 Nov 2024, 06:05
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://kb.juniper.net/JSA11230 - Vendor Advisory |
Information
Published : 2021-10-19 19:15
Updated : 2024-11-21 06:05
NVD link : CVE-2021-31368
Mitre link : CVE-2021-31368
CVE.ORG link : CVE-2021-31368
JSON object : View
Products Affected
juniper
- ex2300-c
- ex2300
- ex2300m
- acx710
- junos
- ex3400
CWE
CWE-400
Uncontrolled Resource Consumption