CVE-2022-22217

published 2022-07-20

CVE-2022-22217: An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an adjacent…

Priority P4 29 medium 6.5 CVSS 3.1

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

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an adjacent unauthenticated attacker to cause a Denial of Service (DoS). The issue is caused by malformed MLD packets looping on a multi-homed Ethernet Segment Identifier (ESI) when VXLAN is configured. These MLD packets received on a multi-homed ESI are sent to the peer, and then incorrectly forwarded out the same ESI, violating the split horizon rule. This issue only affects QFX10K Series switches, including the QFX10002, QFX10008, and QFX10016. Other products and platforms are unaffected by this vulnerability. This issue affects Juniper Networks Junos OS on QFX10K Series: All versions prior to 19.1R3-S9; 19.2 versions prior to 19.2R1-S9, 19.2R3-S5; 19.3 versions prior to 19.3R3-S6; 19.4 versions prior to 19.4R2-S7, 19.4R3-S8; 20.1 versions prior to 20.1R3-S4; 20.2 versions prior to 20.2R3-S4; 20.3 versions prior to 20.3R3-S2; 20.4 versions prior to 20.4R3-S2; 21.1 versions prior to 21.1R3; 21.2 versions prior to 21.2R2-S1, 21.2R3; 21.3 versions prior to 21.3R2.

Affected

25 ranges

Vendor	Product	Version range	Fixed in
juniper	junos	< 19.1	19.1
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos_os	—	—
juniper	qfx_series	—	—
juniper_networks	junos_os	>= 19.2 < 19.2R1-S9, 19.2R3-S5	19.2R1-S9, 19.2R3-S5
juniper_networks	junos_os	>= 19.3 < 19.3R3-S6	19.3R3-S6
juniper_networks	junos_os	>= 19.4 < 19.4R2-S7, 19.4R3-S8	19.4R2-S7, 19.4R3-S8
juniper_networks	junos_os	>= 20.1 < 20.1R3-S4	20.1R3-S4
juniper_networks	junos_os	>= 20.2 < 20.2R3-S4	20.2R3-S4
juniper_networks	junos_os	>= 20.3 < 20.3R3-S2	20.3R3-S2
juniper_networks	junos_os	>= 20.4 < 20.4R3-S2	20.4R3-S2
juniper_networks	junos_os	>= 21.1 < 21.1R3	21.1R3
juniper_networks	junos_os	>= 21.2 < 21.2R2-S1, 21.2R3	21.2R2-S1, 21.2R3
juniper_networks	junos_os	>= 21.3 < 21.3R2	21.3R2
juniper_networks	junos_os	>= unspecified < 19.1R3-S9	19.1R3-S9

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