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CVE-2023-42670— Samba: ad dc busy rpc multiple listener dos

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 6
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Samba是用于 Linux 和 Unix 的标准 Windows 互操作性程序套件。 Samba存在安全漏洞。攻击者利用该漏洞破坏AD DC服务。

CVSS 6.5 · Medium EPSS 1.32% · P71
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I. Basic Information for CVE-2023-42670

Vulnerability Information
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Vulnerability Title
Samba: ad dc busy rpc multiple listener dos
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Samba 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Samba是用于 Linux 和 Unix 的标准 Windows 互操作性程序套件。 Samba存在安全漏洞。攻击者利用该漏洞破坏AD DC服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat Storage 3 - cpe:/a:redhat:storage:3

II. Public POCs for CVE-2023-42670

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III. Intelligence Information for CVE-2023-42670

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Vendor Advisories for CVE-2023-42670 (2)

Mailing List Discussions for CVE-2023-42670 (1)

Other References for CVE-2023-42670 (2)

IV. Related Vulnerabilities

Same weakness: CWE-400