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CVE

CVE-2023-42670

A flaw was found in Samba. It is susceptible to a vulnerability where multiple incompatible RPC listeners can be initiat

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.

MEDIUM · CVSS 6.5 EPSS 0.00385
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-400Uncontrolled Resource Consumption
▤

Affected Products & Versions

4
samba< 4.17.12
samba>= 4.18.0 and < 4.18.8
samba>= 4.19.0 and < 4.19.1
fedoraproject fedoraall versions
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD03 Nov 2023 · 08:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

5
suse-csafopenSUSE-SU-2024:13332-1
usnUSN-6425-3
suse-csafSUSE-SU-2023:4046-1
usnUSN-6425-1
oracle-cpuoracle-cpu-JD-Edwards-EnterpriseOne-Tools-4781--CVE-2023-42670
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://access.redhat.com/security/cve/CVE-2023-42670Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2241885Issue Tracking
https://bugzilla.samba.org/show_bug.cgi?id=15473Issue Tracking
https://www.samba.org/samba/security/CVE-2023-42670.htmlVendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I/
https://security.netapp.com/advisory/ntap-20231124-0002/
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