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CVE-2021-20196

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 存在代码问题漏洞，该漏洞源于block: fdc: 空指针解引用导致客户端崩溃。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.48% · P41

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-20196

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while processing read/write ioport commands if the selected floppy drive is not initialized with a block device. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
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 存在代码问题漏洞，该漏洞源于block: fdc: 空指针解引用导致客户端崩溃。
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 vulnerable up to (including) qemu 5.2.0 -

II. Public POCs for CVE-2021-20196

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-20196

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Vendor Advisories for CVE-2021-20196 (1)

Mailing List Discussions for CVE-2021-20196 (3)

Other References for CVE-2021-20196 (1)

Same Patch Batch · n/a · 2021-05-26 · 92 CVEs total

CVE-2021-29252 5.4 MEDIUM RSA Archer 跨站脚本漏洞
CVE-2021-29253 5.1 MEDIUM RSA Archer 安全漏洞
CVE-2021-22745 Triconex Model 3009 MP 代码问题漏洞
CVE-2021-22705 Schneider Electric 缓冲区错误漏洞
CVE-2021-22731 Schneider Electric 授权问题漏洞
CVE-2021-22735 Schneider Electric homeLYnk和spaceLYnk 数据伪造问题漏洞
CVE-2021-22733 Schneider Electric homeLYnk和spaceLYnk 安全漏洞
CVE-2021-22734 Schneider Electric spaceLYnk和homeLYnk 数据伪造问题漏洞
CVE-2021-22732 Schneider Electric homeLYnk和spaceLYnk 安全漏洞
CVE-2021-22742 Triconex Model 3009 MP 代码问题漏洞
CVE-2021-22743 Triconex Model 3009 MP 代码问题漏洞
CVE-2021-22744 Triconex Model 3009 MP 代码问题漏洞
CVE-2021-22740 Schneider Electric homeLYnk和spaceLYnk 信息泄露漏洞
CVE-2021-22746 Triconex Model 3009 MP 代码问题漏洞
CVE-2021-22747 Triconex Model 3009 MP 代码问题漏洞
CVE-2020-22021 FFmpeg 缓冲区错误漏洞
CVE-2021-25643 Couchbase Server 安全漏洞
CVE-2020-22024 FFmpeg 安全漏洞
CVE-2020-22026 FFmpeg 安全漏洞
CVE-2021-3548 dmg2img 缓冲区错误漏洞

Showing top 20 of 92 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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