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CVE-2021-4206

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 v6.0.0 之前版本存在安全漏洞，该漏洞源于 cursor_alloc（） 中的整数溢出可能导致堆缓冲区溢出。恶意特权攻击者利用此漏洞可在主机上使 QEMU 进程崩溃，或者可能在 QEMU 进程的上下文中执行任意代码。

AI Predicted 8.8 Difficulty: Moderate EPSS 0.83% · P56

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2021-4206

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursor_alloc() function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
QEMU 安全漏洞
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 v6.0.0 之前版本存在安全漏洞，该漏洞源于 cursor_alloc（） 中的整数溢出可能导致堆缓冲区溢出。恶意特权攻击者利用此漏洞可在主机上使 QEMU 进程崩溃，或者可能在 QEMU 进程的上下文中执行任意代码。
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 7.0.0 -

II. Public POCs for CVE-2021-4206

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III. Intelligence Information for CVE-2021-4206

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Vendor Advisories for CVE-2021-4206 (3)

Mailing List Discussions for CVE-2021-4206 (1)

Other References for CVE-2021-4206 (1)

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Showing top 20 of 32 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: QEMU
Same vendor: n/a
Same weakness: CWE-190

V. Comments for CVE-2021-4206

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