Is CVE-2023-42670 in the CISA KEV catalog?

No. CVE-2023-42670 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-42670?

CVE-2023-42670 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2023-42670?

CVE-2023-42670 has an EPSS score of 1.10% (62th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-42670?

Upgrade samba on debian 12 to 2:4.17.12+dfsg-0+deb12u1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2023-42670

MEDIUM

6.5

CVSS v3

NVD

Description

A flaw was found in Samba. It is susceptible to a vulnerability where multiple incompatible RPC listeners can be initiated, causing disruptions in the AD DC service. When Samba's RPC server experiences a high load or unresponsiveness, servers intended for non-AD DC purposes (for example, NT4-emulation "classic DCs") can erroneously start and compete for the same unix domain sockets. This issue leads to partial query responses from the AD DC, causing issues such as "The procedure number is out of range" when using tools like Active Directory Users. This flaw allows an attacker to disrupt AD DC services.

CWE-400Resource Exhaustion

How to fix

Remediation Available

sambaDebian

Fixed in:2:4.17.12+dfsg-0+deb12u1CVE-2023-42670

Fixed in:2:4.19.1+dfsg-1CVE-2023-42670

sambaUbuntu

Fixed in:2:4.15.13+dfsg-0ubuntu0.20.04.6USN-6425-1

Fixed in:2:4.15.13+dfsg-0ubuntu1.5USN-6425-1

Fixed in:2:4.17.7+dfsg-1ubuntu2.3USN-6425-1

Fixed in:2:4.18.6+dfsg-1ubuntu2.1USN-6425-3

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 RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.10%probability of exploitation in 30 days

62ndpercentile

Moderate risk: more likely to be exploited than 62% of all known CVEs.

References

Vendor Advisory1

samba.org

Third-Party Advisory1

access.redhat.com

Issue Tracking2

Other references2

Related Vulnerabilities

Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-44487	High	7.5	100%	KEV	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2011-3192	High	7.8	99%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2024-25617	Medium	5.3	89%	-	Fix
CVE-2018-1000115	High	7.5	89%	-	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.