title: PAN-OS: Information exposure in Ethernet data frame construction (Etherleak)
description: Padding bytes in Ethernet packets on PA-200, PA-220, PA-500, PA-800, PA-2000 Series, PA-3000 Series, PA-3200 Series, PA-5200 Series, and PA-7000 Series firewalls are not cleared before the data frame is created. This leaks a small amount of random information from the firewall memory into the Ethernet packets. An attacker on the same Ethernet subnet as the PAN-OS firewall is able to collect potentially sensitive information from these packets. This issue is also known as Etherleak and is detected by security scanners as CVE-2003-0001. This issue impacts: PAN-OS 8.1 version earlier than PAN-OS 8.1.18; PAN-OS 9.0 versions earlier than PAN-OS 9.0.12; PAN-OS 9.1 versions earlier than PAN-OS 9.1.5.
problem types: CWE-200 Information Exposure
affected:
{
platforms: PA-200, PA-220, PA-500, PA-800, PA-2000 Series, PA-3000 Series, PA-3200 Series, PA-5200
product: PAN-OS
vendor: Palo Alto Networks
versions:
lessThan: 8.1.18, status: affected, version: 8.1, versionType: custom
lessThan: 9.0.12, status: affected, version: 9.0, versionType: custom
lessThan: 9.1.5, status: affected, version: 9.1, versionType: custom
}
{
product: PAN-OS
vendor: Palo Alto Networks
versions:
status: unaffected, version: 10.0.*
lessThan: 8.1*, status: unaffected, version: 8.1.18, versionType: custom
lessThan: 9.0*, status: unaffected, version: 9.0.12, versionType: custom
lessThan: 9.1*, status: unaffected, version: 9.1.5, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: ADJACENT_NETWORK
availabilityImpact: NONE
baseScore: 4.3
baseSeverity: MEDIUM
confidentialityImpact: LOW
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
version: 3.1
]
exploits: Palo Alto Networks is not aware of any malicious exploitation of this issue.
solutions: This issue is fixed in PAN-OS 8.1.18, PAN-OS 9.0.12, PAN-OS 9.1.5, and all later PAN-OS versions.
workarounds: There is no workaround to prevent the information leak in the Ethernet packets; however, restricting access to the networks mitigates the risk of this issue.