SARA / Free Tools / CVE / CVE-2023-42670

CVE-2023-42670 — A flaw was found in Samba

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

CVSS
6.5 MEDIUM
EPSS
39.00% (top 40.60%)
CWE
CWE-400
Published
2023-11-03T07:58:04.881Z
Last modified
2025-11-20T18:28:26.442Z
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

01What is this vulnerability?

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…

02Affected products

VendorProductVersions
??4.16.0, 4.18.0, 4.19.0
Red HatRed Hat Enterprise Linux 6unspecified
Red HatRed Hat Enterprise Linux 6unspecified
Red HatRed Hat Enterprise Linux 7unspecified
Red HatRed Hat Enterprise Linux 8unspecified
Red HatRed Hat Enterprise Linux 9unspecified
Red HatRed Hat Storage 3unspecified

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

Want this in your SOAR or SIEM?
SARA's API returns EPSS, CVSS, KEV, and an analyst-grade summary in one call.
Read the API reference →