CVE-2023-42670

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-400

• 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/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I/
• https://security.netapp.com/advisory/ntap-20231124-0002/
• https://www.samba.org/samba/security/CVE-2023-42670.htmlVendor Advisory

Published

Nov 3, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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• CVE-2023-42672In imsservice, there is a possible way to write permission u…5.5
• CVE-2023-42673In imsservice, there is a possible way to write permission u…5.5
• CVE-2023-42674In imsservice, there is a possible way to write permission u…5.5
• CVE-2023-42675In imsservice, there is a possible way to write permission u…5.5
• CVE-2023-42676In imsservice, there is a possible way to write permission u…5.5