Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Samba | Samba | < 4.17.12 |
| Fedoraproject | Fedora | 39 |
Related Weaknesses (CWE)
References
- 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://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://lists.fedoraproject.org/archives/list/[email protected]
- https://security.netapp.com/advisory/ntap-20231124-0002/
- https://www.samba.org/samba/security/CVE-2023-42670.htmlVendor Advisory
FAQ
What is CVE-2023-42670?
CVE-2023-42670 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 experience...
How severe is CVE-2023-42670?
CVE-2023-42670 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-42670?
Check the references section above for vendor advisories and patch information. Affected products include: Samba Samba, Fedoraproject Fedora.