Is CVE-2021-3047 in the CISA KEV catalog?

No. CVE-2021-3047 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3047?

CVE-2021-3047 has a CVSS v3 base score of 4.2 (MEDIUM).

What is the EPSS score for CVE-2021-3047?

CVE-2021-3047 has an EPSS score of 0.45% (36th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3047?

Upgrade pan-os to 10.0.4 or later.

CVE & CISA-KEV Catalog

CVE-2021-3047

MEDIUM

4.2

CVSS v3

NVD

Description

A cryptographically weak pseudo-random number generator (PRNG) is used during authentication to the Palo Alto Networks PAN-OS web interface. This enables an authenticated attacker, with the capability to observe their own authentication secrets over a long duration on the PAN-OS appliance, to impersonate another authenticated web interface administrator's session. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.19; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.10; PAN-OS 10.0 versions earlier than PAN-OS 10.0.4. PAN-OS 10.1 versions are not impacted.

CWE-338

How to fix

Remediation Available

pan-osNVD

Affected:>= 10.0.0, < 10.0.4Fixed in:10.0.4CVE-2021-3047derived 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 ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.45%probability of exploitation in 30 days

36thpercentile

Low risk: more likely to be exploited than 36% of all known CVEs.

References

Vendor Advisory1

security.paloaltonetworks.com

Related Vulnerabilities

Other CWE-338 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2008-0166	High	7.5	71%	-	Fix
CVE-2009-2367	Critical	9.8	23%	-	-
CVE-2024-29868	Critical	9.1	6.0%	-	-
CVE-2024-31497	Medium	5.9	5.8%	-	Fix
CVE-2021-43799	High	8.6	5.4%	-	Fix
CVE-2008-3280	Medium	5.9	4.0%	-	-

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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.