title: Junos OS: QFX10000 Series: All traffic will be dropped after a specific valid IP packet has been received which needs to be routed over a VXLAN tunnel
description: 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.
problem types: CWE-754 Improper Check for Unusual or Exceptional Conditions
affected:
{
defaultStatus: unaffected
platforms: QFX10000 Series
product: Junos OS
vendor: Juniper Networks
versions:
changes: [at: 20.3R1, status: affected], lessThan: 20.3*, status: affected, version: 20.3, versionType: custom
lessThan: 20.4R3-S5, status: affected, version: 20.4, versionType: custom
lessThan: 21.1R3-S5, status: affected, version: 21.1, versionType: custom
lessThan: 21.2R3-S5, status: affected, version: 21.2, versionType: custom
lessThan: 21.3R3-S4, status: affected, version: 21.3, versionType: custom
lessThan: 21.4R3-S1, status: affected, version: 21.4, versionType: custom
lessThan: 22.1R3, status: affected, version: 22.1, versionType: custom
lessThan: 22.2R2, status: affected, version: 22.2, versionType: custom
lessThan: 22.3R1-S2, 22.3R2, status: affected, version: 22.3, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 7.5
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL
exploits: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
solutions: The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S5, 21.1R3-S5, 21.2R3-S5, 21.3R3-S4, 21.4R3-S1, 22.1R3, 22.2R2, 22.3R1-S2, 22.3R2, 22.4R1, and all subsequent releases.
workarounds: There are no known workarounds for this issue.