Is CVE-2021-3063 in the CISA KEV catalog?

No. CVE-2021-3063 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3063?

CVE-2021-3063 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-3063?

CVE-2021-3063 has an EPSS score of 0.90% (55th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3063?

Upgrade pan-os to 10.1.3 or later.

CVE & CISA-KEV Catalog

CVE-2021-3063

HIGH

7.5

CVSS v3

NVD

Description

An improper handling of exceptional conditions vulnerability exists in Palo Alto Networks GlobalProtect portal and gateway interfaces that enables an unauthenticated network-based attacker to send specifically crafted traffic to a GlobalProtect interface that causes the service to stop responding. Repeated attempts to send this request result in denial of service to all PAN-OS services by restarting the device and putting it into maintenance mode. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.21; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14-h4; PAN-OS 9.1 versions earlier than PAN-OS 9.1.11-h3; PAN-OS 10.0 versions earlier than PAN-OS 10.0.8-h4; PAN-OS 10.1 versions earlier than PAN-OS 10.1.3. Prisma Access customers are not impacted by this issue.

CWE-755

How to fix

Remediation Available

pan-osNVD

Affected:>= 10.1.0, < 10.1.3Fixed in:10.1.3CVE-2021-3063derived 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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.90%probability of exploitation in 30 days

55thpercentile

Moderate risk: more likely to be exploited than 55% of all known CVEs.

References

Vendor Advisory1

security.paloaltonetworks.com

Related Vulnerabilities

Other CWE-755 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-5638	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-7247	Critical	9.8	99%	KEV	Fix
CVE-2023-36933	High	7.5	72%	-	Fix
CVE-2018-0934	High	7.5	66%	-	Fix
CVE-2019-14287	High	8.8	64%	-	Fix
CVE-2019-12815	Critical	9.8	58%	-	Fix

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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.