Junos OS: QFX5000 Series and EX Series: Specific malformed LACP packets will cause flaps

An Improper Isolation or Compartmentalization vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on QFX5000 Series and EX Series allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).

If a specific malformed LACP packet is received by a QFX5000 Series, or an EX4400, EX4100 or EX4650 Series device, an LACP flap will occur resulting in traffic loss. This issue affects Junos OS on QFX5000 Series, and on EX4400, EX4100 or EX4650 Series:

• 20.4 versions from

20.4R3-S4

before 20.4R3-S8, * 21.2 versions from

21.2R3-S2

before 21.2R3-S6, * 21.4 versions from

21.4R2

before 21.4R3-S4,

• 22.1 versions from

22.1R2

before 22.1R3-S3, * 22.2 versions before 22.2R3-S1, * 22.3 versions before 22.3R2-S2, 22.3R3, * 22.4 versions before 22.4R2-S1, 22.4R3.