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CVE-2023-34967— Samba: type confusion in mdssvc rpc service for spotlight

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 8
Exploitation
High exploitation probability; assess promptly
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 4.18.5之前版本存在安全漏洞，该漏洞源于未经身份验证的攻击者可以利用缺少类型验证来触发共享工作进程中的进程崩溃。

CVSS 5.3 · Medium EPSS 61.20% · P99

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2023-34967

Vulnerability Information
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Vulnerability Title
Samba: type confusion in mdssvc rpc service for spotlight
Source: CVE Program / CVE List V5
Vulnerability Description
A Type Confusion vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets, one encoded data structure is a key-value style dictionary where the keys are character strings, and the values can be any of the supported types in the mdssvc protocol. Due to a lack of type checking in callers of the dalloc_value_for_key() function, which returns the object associated with a key, a caller may trigger a crash in talloc_get_size() when talloc detects that the passed-in pointer is not a valid talloc pointer. With an RPC worker process shared among multiple client connections, a malicious client or attacker can trigger a process crash in a shared RPC mdssvc worker process, affecting all other clients this worker serves.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
使用不兼容类型访问资源(类型混淆)
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 4.18.5之前版本存在安全漏洞，该漏洞源于未经身份验证的攻击者可以利用缺少类型验证来触发共享工作进程中的进程崩溃。
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 8 0:4.18.6-1.el8 ~ * cpe:/a:redhat:enterprise_linux:8::crb
Red Hat Red Hat Enterprise Linux 8 0:4.18.6-1.el8 ~ * cpe:/a:redhat:enterprise_linux:8::crb
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support 0:4.15.5-15.el8_6 ~ * cpe:/o:redhat:rhel_eus:8.6::baseos
Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support 0:4.17.5-5.el8_8 ~ * cpe:/a:redhat:rhel_eus:8.8::appstream
Red Hat Red Hat Enterprise Linux 9 0:4.18.6-100.el9 ~ * cpe:/a:redhat:enterprise_linux:9::resilientstorage
Red Hat Red Hat Enterprise Linux 9 0:4.18.6-100.el9 ~ * cpe:/a:redhat:enterprise_linux:9::resilientstorage
Red Hat Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 0:4.15.5-15.el8_6 ~ * cpe:/o:redhat:rhel_eus:8.6::baseos
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 Storage 3 - cpe:/a:redhat:storage:3

II. Public POCs for CVE-2023-34967

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III. Intelligence Information for CVE-2023-34967

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Vendor Advisories for CVE-2023-34967 (8)

Mailing List Discussions for CVE-2023-34967 (2)

Other References for CVE-2023-34967 (1)

Same Patch Batch · Red Hat · 2023-07-20 · 5 CVEs total

CVE-2023-34966 7.5 HIGH Samba: infinite loop in mdssvc rpc service for spotlight
CVE-2023-3347 5.9 MEDIUM Samba: smb2 packet signing is not enforced when "server signing = required" is set
CVE-2022-2127 5.9 MEDIUM Samba: out-of-bounds read in winbind auth_crap
CVE-2023-34968 5.3 MEDIUM Samba: spotlight server-side share path disclosure

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 8
Same vendor: Red Hat
Same weakness: CWE-843

V. Comments for CVE-2023-34967

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