Is CVE-2021-4248 in the CISA KEV catalog?

No. CVE-2021-4248 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-4248?

CVE-2021-4248 has a CVSS v3 base score of 5.6 (MEDIUM).

What is the EPSS score for CVE-2021-4248?

CVE-2021-4248 has an EPSS score of 0.75% (50th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-4248?

Upgrade kapetan dns to 7.0.0 or later.

CVE & CISA-KEV Catalog

CVE-2021-4248

MEDIUM

5.6

CVSS v3

NVD

Description

A vulnerability was found in kapetan dns up to 6.1.0. It has been rated as problematic. Affected by this issue is some unknown functionality of the file DNS/Protocol/Request.cs. The manipulation leads to insufficient entropy in prng. The attack may be launched remotely. Upgrading to version 7.0.0 is able to address this issue. The name of the patch is cf7105aa2aae90d6656088fe5a8ee1d5730773b6. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-216188.

CWE-330

How to fix

Remediation Available

kapetan dnsNVD

Affected:< 7.0.0Fixed in:7.0.0CVE-2021-4248derived 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 RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

0.75%probability of exploitation in 30 days

50thpercentile

Moderate risk: more likely to be exploited than 50% of all known CVEs.

References

Patch2

Third-Party Advisory2

Related Vulnerabilities

Other CWE-330 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-5420	Critical	9.8	92%	-	Fix
CVE-2021-34646	Critical	9.8	51%	-	-
CVE-2017-6026	Critical	9.1	32%	-	-
CVE-2008-0087	High	7.5	31%	-	-
CVE-2018-17888	Critical	9.8	30%	-	-
CVE-2020-11901	Critical	9.0	21%	-	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.