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CVE-2023-32248— Tree connection null pointer dereference denial-of-service vulnerability

Quick assessment

Affected
n/a kernel
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.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于SMB2_TREE_CONNECT 和 SMB2_QUERY_INFO 命令处理存在缺陷，在访问指针之前缺乏对指针的正确验证，攻击者利用该漏洞可以导致拒绝服务。

CVSS 7.5 · High EPSS 4.06% · P90
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I. Basic Information for CVE-2023-32248

Vulnerability Information
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Vulnerability Title
Tree connection null pointer dereference denial-of-service vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the Linux kernel's ksmbd, a high-performance in-kernel SMB server. The specific flaw exists within the handling of SMB2_TREE_CONNECT and SMB2_QUERY_INFO commands. The issue results from the lack of proper validation of a pointer prior to accessing it. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.
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:H
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于SMB2_TREE_CONNECT 和 SMB2_QUERY_INFO 命令处理存在缺陷，在访问指针之前缺乏对指针的正确验证，攻击者利用该漏洞可以导致拒绝服务。
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
- kernel 6.4-rc1 -
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 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 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Fedora Fedora - -

II. Public POCs for CVE-2023-32248

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III. Intelligence Information for CVE-2023-32248

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Vendor Advisories for CVE-2023-32248 (4)

Same Patch Batch · n/a · 2023-07-24 · 18 CVEs total

CVE-2023-32257 8.1 HIGH Session race condition remote code execution vulnerability
CVE-2023-32258 8.1 HIGH Session race condition remote code execution vulnerability
CVE-2023-32252 7.5 HIGH Session null pointer dereference denial-of-service vulnerability
CVE-2023-32247 7.5 HIGH Session setup memory exhaustion denial-of-service vulnerability
CVE-2023-3863 6.4 MEDIUM Use-after-free in nfc_llcp_find_loca in net/nfc/llcp_core.c
CVE-2023-2860 4.4 MEDIUM Out-of-bounds read when setting hmac data
CVE-2023-3748 3.5 LOW Inifinite loop in babld message parsing may cause dos
CVE-2023-1386 3.3 LOW Qemu: 9pfs: suid/sgid bits not dropped on file write
CVE-2021-39421 SeedDMS 跨站脚本漏洞
CVE-2022-30280 Nokia NetAct 跨站请求伪造漏洞
CVE-2023-26077 Atera Agent 安全漏洞
CVE-2023-37613 Assembly Software Trialworks 跨站脚本漏洞
CVE-2023-26078 Atera Agent 安全漏洞
CVE-2022-28863 Nokia NetAct 代码问题漏洞
CVE-2022-28864 Nokia NetAct 安全漏洞
CVE-2022-28865 Nokia NetAct 跨站脚本漏洞
CVE-2022-28867 Nokia NetAct 跨站脚本漏洞

IV. Related Vulnerabilities

Same product: kernel
Same vendor: n/a
Same weakness: CWE-476

V. Comments for CVE-2023-32248

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