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CVE-2022-42464— Kernel memory pool override in /dev/mmz_userdev device driver. The impact depends on the privileges of the attacker. The unprivileged process run on the device could disclose sensitive information including kernel pointer, which could be used in furth ...

Quick assessment

Affected
OpenHarmony OpenHarmony
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.

OpenHarmony是中国OpenAtom Foundation基金会的一种鸿蒙操作系统的开源项目。 OpenHarmony v3.1.2及以前版本和3.0.6及以前版本存在安全漏洞，该漏洞源于其/dev/mmz_userdev设备驱动程序中内核内存池覆盖问题导致设备上运行的无特权进程可能会泄露包括内核指针在内的敏感信息，这些信息可能被用于进一步的攻击。或在设备上运行的具有系统用户UID的进程将能够mmap内核使用的内存池并覆盖它们，这可以用于在设备上获得内核代码执行、获得根权限或导致设备重新启动。上述

CVSS 6.7 · Medium EPSS 0.19% · P9
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I. Basic Information for CVE-2022-42464

Vulnerability Information
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Vulnerability Title
Kernel memory pool override in /dev/mmz_userdev device driver. The impact depends on the privileges of the attacker. The unprivileged process run on the device could disclose sensitive information including kernel pointer, which could be used in furth ...
Source: CVE Program / CVE List V5
Vulnerability Description
OpenHarmony-v3.1.2 and prior versions, 3.0.6 and prior versions have a Kernel memory pool override vulnerability in /dev/mmz_userdev device driver. The impact depends on the privileges of the attacker. The unprivileged process run on the device could disclose sensitive information including kernel pointer, which could be used in further attacks. The processes with system user UID run on the device would be able to mmap memory pools used by kernel and override them which could be used to gain kernel code execution on the device, gain root privileges, or cause device reboot.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
缺省权限不正确
Source: CVE Program / CVE List V5
Vulnerability Title
OpenHarmony 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenHarmony是中国OpenAtom Foundation基金会的一种鸿蒙操作系统的开源项目。 OpenHarmony v3.1.2及以前版本和3.0.6及以前版本存在安全漏洞，该漏洞源于其/dev/mmz_userdev设备驱动程序中内核内存池覆盖问题导致设备上运行的无特权进程可能会泄露包括内核指针在内的敏感信息，这些信息可能被用于进一步的攻击。或在设备上运行的具有系统用户UID的进程将能够mmap内核使用的内存池并覆盖它们，这可以用于在设备上获得内核代码执行、获得根权限或导致设备重新启动。上述
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
OpenHarmony OpenHarmony OpenHarmony-v3.1.x-Release ~ 3.1.2 -

II. Public POCs for CVE-2022-42464

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III. Intelligence Information for CVE-2022-42464

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Other References for CVE-2022-42464 (1)

Same Patch Batch · OpenHarmony · 2022-10-14 · 4 CVEs total

CVE-2022-42488 8.4 HIGH Startup subsystem missed permission validation in param service. An malicious application
CVE-2022-42463 8.3 HIGH Softbus_server in communication subsystem has a authenication bypass vulnerability in a ca
CVE-2022-41686 5.1 MEDIUM Out-of-bound memory read and write in /dev/mmz_userdev device driver. The impact depends o

IV. Related Vulnerabilities

Same product: OpenHarmony
Same vendor: OpenHarmony
Same weakness: CWE-276

V. Comments for CVE-2022-42464

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