CVE-2023-36835

published 2023-07-14

CVE-2023-36835: An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on QFX10000 Series…

Priority P3 44 high 7.5 CVSS 3.1

AV N 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 on QFX10000 Series allows a network based attacker to cause a Denial of Service (DoS).

If a specific valid IP packet is received and that packet needs to be routed over a VXLAN tunnel, this will result in a PFE wedge condition due to which traffic gets impacted. As this is not a crash and restart scenario, this condition will persist until the system is rebooted to recover.

This issue affects Juniper Networks Junos OS on QFX10000:
20.3 version 20.3R1 and later versions;
20.4 versions prior to 20.4R3-S5;
21.1 versions prior to 21.1R3-S5;
21.2 versions prior to 21.2R3-S5;
21.3 versions prior to 21.3R3-S4;
21.4 versions prior to 21.4R3-S1;
22.1 versions prior to 22.1R3;
22.2 versions prior to 22.2R2;
22.3 versions prior to 22.3R1-S2, 22.3R2.

Affected

20 ranges

Vendor	Product	Version range	Fixed in
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	>= 20.3 < 20.3*	20.3*
juniper_networks	junos_os	>= 20.4 < 20.4R3-S5	20.4R3-S5
juniper_networks	junos_os	>= 21.1 < 21.1R3-S5	21.1R3-S5
juniper_networks	junos_os	>= 21.2 < 21.2R3-S5	21.2R3-S5
juniper_networks	junos_os	>= 21.3 < 21.3R3-S4	21.3R3-S4
juniper_networks	junos_os	>= 21.4 < 21.4R3-S1	21.4R3-S1
juniper_networks	junos_os	>= 22.1 < 22.1R3	22.1R3
juniper_networks	junos_os	>= 22.2 < 22.2R2	22.2R2
juniper_networks	junos_os	>= 22.3 < 22.3R1-S2, 22.3R2	22.3R1-S2, 22.3R2

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