Is CVE-2021-3031 in the CISA KEV catalog?

No. CVE-2021-3031 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3031?

CVE-2021-3031 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2021-3031?

CVE-2021-3031 has an EPSS score of 0.54% (41th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3031?

Upgrade pan-os to 9.1.5 or later.

CVE & CISA-KEV Catalog

CVE-2021-3031

MEDIUM

4.3

CVSS v3

NVD

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.

CWE-200Information Exposure CWE-212

How to fix

Remediation Available

pan-osNVD

Affected:>= 9.1.0, < 9.1.5Fixed in:9.1.5CVE-2021-3031derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

0.54%probability of exploitation in 30 days

41stpercentile

Moderate risk: more likely to be exploited than 41% of all known CVEs.

References

Vendor Advisory1

security.paloaltonetworks.com

Embed a live status badge for CVE-2021-3031

Markdown

[![CVE-2021-3031](https://tridentstack.com/cve/badge/CVE-2021-3031.svg)](https://tridentstack.com/cve/CVE-2021-3031)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-3031"><img src="https://tridentstack.com/cve/badge/CVE-2021-3031.svg" alt="CVE-2021-3031"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.