What is CVE-2021-3031?

CVE-2021-3031 is a security advisory published by Palo Alto Networks Security Advisories with Medium severity. CVE-2021-3031 PAN-OS: Information exposure in Ethernet data frame construction (Etherleak)

Which CVE IDs does CVE-2021-3031 cover?

CVE-2021-3031 covers the following CVE IDs: CVE-2021-3031. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by CVE-2021-3031?

CVE-2021-3031 affects 1 product, including: PAN-OS.

CVE-2021-3031Medium

CVE-2021-3031 PAN-OS: Information exposure in Ethernet data frame construction (Etherleak)

Vendor

Palo Alto Networks Security Advisories

Published

January 13, 2021

Last Modified

January 19, 2021

🔗 CVE IDs covered (1)

CVE-2021-3031 →

📋 Description

Padding bytes in Ethernet packets on PA-200, PA-220, PA-500, PA-5000 Series, 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; All versions of PAN-OS 8.0 and PAN-OS 7.1.

🎯 Affected products1

PAN-OS

✅ Remediation

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 and mitigations: 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.

🔗 References (1)

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