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CVE-2021-4145

Quick assessment

Affected
n/a QEMU
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.

QEMU（Quick Emulator）是法国法布里斯-贝拉（Fabrice Bellard）个人开发者的一套模拟处理器软件。该软件具有速度快、跨平台等特点。 QEMU 6.2.0之前版本存在代码问题漏洞，该漏洞源于块镜像层中发现了一个空指针解引用问题。攻击者可利用该漏洞使主机上的QEMU进程崩溃。

AI Predicted 6.5 Difficulty: Easy EPSS 0.39% · P31
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I. Basic Information for CVE-2021-4145

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0. The `self` pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host when writing data reaches the threshold of mirroring node.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
QEMU 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
QEMU（Quick Emulator）是法国法布里斯-贝拉（Fabrice Bellard）个人开发者的一套模拟处理器软件。该软件具有速度快、跨平台等特点。 QEMU 6.2.0之前版本存在代码问题漏洞，该漏洞源于块镜像层中发现了一个空指针解引用问题。攻击者可利用该漏洞使主机上的QEMU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
- QEMU qemu-kvm 6.2.0 -

II. Public POCs for CVE-2021-4145

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III. Intelligence Information for CVE-2021-4145

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Patches & Fixes for CVE-2021-4145 (1)

Vendor Advisories for CVE-2021-4145 (3)

Same Patch Batch · n/a · 2022-01-25 · 67 CVEs total

CVE-2021-45803 MartDevelopers Iresturant SQL注入漏洞
CVE-2021-40159 Autodesk Inventor 信息泄露漏洞
CVE-2021-40158 Autodesk Inventor 缓冲区错误漏洞
CVE-2021-44988 JerryScript 缓冲区错误漏洞
CVE-2021-46483 Jsish 缓冲区错误漏洞
CVE-2022-23935 exiftool 操作系统命令注入漏洞
CVE-2021-45340 libsixel 代码问题漏洞
CVE-2021-45844 FreeCad 操作系统命令注入漏洞
CVE-2021-45845 FreeCad 操作系统命令注入漏洞
CVE-2021-45802 MartDevelopers Iresturant SQL注入漏洞
CVE-2021-46481 Jsish 安全漏洞
CVE-2021-46113 MartDevelopers KEA-Hotel-ERP 代码问题漏洞
CVE-2021-45846 Slic3r 代码问题漏洞
CVE-2021-45847 Slic3r 代码问题漏洞
CVE-2021-46089 JeecgBoot SQL注入漏洞
CVE-2021-46033 ForestBlog 代码问题漏洞
CVE-2021-46034 ForestBlog 跨站脚本漏洞
CVE-2021-46086 Mindskip xzs-mysql 权限许可和访问控制问题漏洞
CVE-2021-46084 Uscat 跨站脚本漏洞
CVE-2021-46083 Uscat 跨站脚本漏洞

Showing top 20 of 67 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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

V. Comments for CVE-2021-4145

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