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CVE-2021-20221

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 4.2.0版本存在缓冲区错误漏洞。攻击者利用该漏洞导致系统拒绝服务。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.33% · P23

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood
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I. Basic Information for CVE-2021-20221

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
QEMU 缓冲区错误漏洞
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 4.2.0版本存在缓冲区错误漏洞。攻击者利用该漏洞导致系统拒绝服务。
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
- qemu up to, including qemu 4.2.0 -

II. Public POCs for CVE-2021-20221

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III. Intelligence Information for CVE-2021-20221

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Vendor Advisories for CVE-2021-20221 (2)

Mailing List Discussions for CVE-2021-20221 (3)

Same Patch Batch · n/a · 2021-05-13 · 36 CVEs total

CVE-2021-23909 6.3 MEDIUM Mercedes Benz HERMES E Series 缓冲区错误漏洞
CVE-2021-23910 5.3 MEDIUM Mercedes Benz HERMES 缓冲区错误漏洞
CVE-2021-23908 2.9 LOW Mercedes-Benz AG MBUX Infotainment System 安全漏洞
CVE-2021-23907 2.9 LOW Mercedes-Benz AG MBUX Infotainment System 输入验证错误漏洞
CVE-2021-23906 1.8 LOW Mercedes-Benz AG MBUX Infotainment System 输入验证错误漏洞
CVE-2021-25693 Teradici PCoIP Graphics Agent 代码问题漏洞
CVE-2020-25713 Red Hat Enterprise Linux 缓冲区错误漏洞
CVE-2020-27830 Linux kernel 代码问题漏洞
CVE-2020-28063 ArticleCMS 代码问题漏洞
CVE-2020-20092 ArticleCMS 代码问题漏洞
CVE-2020-27823 OpenJPEG 缓冲区错误漏洞
CVE-2020-27824 OpenJPEG 缓冲区错误漏洞
CVE-2020-14354 Fedora 资源管理错误漏洞
CVE-2021-20250 Red Hat JBoss EJB Client 信息泄露漏洞
CVE-2021-32918 Prosodical Thoughts Prosody 资源管理错误漏洞
CVE-2021-25694 Teradici PCoIP Graphics Agent 代码问题漏洞
CVE-2021-22154 Blackberry BlackBerry UEM 信息泄露漏洞
CVE-2021-22153 Blackberry BlackBerry UEM 安全漏洞
CVE-2021-22152 Blackberry BlackBerry UEM 输入验证错误漏洞
CVE-2021-31215 Schedmd SchedMD Slurm 安全漏洞

Showing top 20 of 36 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: qemu
Same vendor: n/a
Same weakness: CWE-125

V. Comments for CVE-2021-20221

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