Is CVE-2021-23192 in the CISA KEV catalog?

No. CVE-2021-23192 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-23192?

CVE-2021-23192 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-23192?

CVE-2021-23192 has an EPSS score of 1.95% (78th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-23192?

Upgrade samba on debian 11 to 2:4.13.13+dfsg-1~deb11u2 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-23192

HIGHEPSS 78th pctl

7.5

CVSS v3

NVD

Description

A flaw was found in the way samba implemented DCE/RPC. If a client to a Samba server sent a very large DCE/RPC request, and chose to fragment it, an attacker could replace later fragments with their own data, bypassing the signature requirements.

CWE-20Improper Input Validation

How to fix

Remediation Available

sambaDebian

Fixed in:2:4.13.13+dfsg-1~deb11u2CVE-2021-23192

Fixed in:2:4.13.14+dfsg-1CVE-2021-23192

sambaUbuntu

Fixed in:2:4.13.14+dfsg-0ubuntu0.20.04.1USN-5142-1

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

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

1.95%probability of exploitation in 30 days

78thpercentile

Elevated risk: more likely to be exploited than 78% of all known CVEs.

References

Patch1

samba.org

Third-Party Advisory2

Other references1

security.gentoo.org

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	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.