CVE-2021-3031

PAN-OS: Information exposure in Ethernet data frame construction (Etherleak)

State: Published
Severity: 4.3 Medium
Published: Jan 13, 2021
Updated: Sep 16, 2024
Reserved: Jan 6, 2021

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.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	palo_alto

Weaknesses

CWE-200 Information Exposure

Affected Products

Product	Versions
PAN-OSPalo Alto Networks	8.1 to before 8.1.18Affected 9.0 to before 9.0.12Affected 9.1 to before 9.1.5Affected
PAN-OSPalo Alto Networks	10.0.Not affected 8.1.18 to before 8.1Not affected 9.0.12 to before 9.0Not affected 9.1.5 to before 9.1Not affected

References

https://security.paloaltonetworks.com/CVE-2021-3031

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