QID 43880

Juniper Junos is the network operating system used in Juniper Networks hardware systems.

An Improper Check for Unusual or Exceptional Conditions vulnerability combined with Improper Handling of Exceptional Conditions in Juniper Networks Junos OS on QFX Series and PTX Series allows an unauthenticated network based attacker to cause increased FPC CPU utilization by sending specific IP packets

This issue affects:
Juniper Networks Junos OS on QFX series.
All versions prior to 17.3R3-S11
17.4 versions prior to 17.4R2-S13, 17.4R3-S4
18.1 versions prior to 18.1R3-S12
18.2 versions prior to 18.2R2-S8, 18.2R3-S7
18.3 versions prior to 18.3R3-S4
18.4 versions prior to 18.4R1-S8, 18.4R2-S7, 18.4R3-S7
19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3-S4
19.2 versions prior to 19.2R1-S6, 19.2R3-S2
19.3 versions prior to 19.3R3-S1
19.4 versions prior to 19.4R2-S3, 19.4R3-S1
20.1 versions prior to 20.1R2, 20.1R3
20.2 versions prior to 20.2R2, 20.2R3
20.3 versions prior to 20.3R1-S1, 20.3R2

Juniper Networks Junos OS on PTX series.
All versions prior to 18.4R3-S9
19.1 versions prior to 19.1R3-S6
19.2 versions prior to 19.2R1-S7, 19.2R3-S3
19.3 versions prior to 19.3R2-S6, 19.3R3-S3
19.4 versions prior to 19.4R1-S4, 19.4R3-S5
20.1 versions prior to 20.1R2-S2, 20.1R3
20.2 versions prior to 20.2R3-S1
20.3 versions prior to 20.3R2-S1, 20.3R3
20.4 versions prior to 20.4R2-S1, 20.4R3
21.1 versions prior to 21.1R1-S1, 21.1R2

QID detection logic: (Authenticated)
It checks for vulnerable Junos OS version.

Successful exploitation allows attacker to create a sustained Denial of Service (DoS) condition.