Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2021-20203

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 中存在输入验证错误漏洞。该漏洞源于攻击者可通过QEMU的vmxnet3触发整数溢出，以触发拒绝服务，并可能在主机系统上运行代码。

AI Predicted 5.5 Difficulty: Easy EPSS 0.59% · P46

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-20203

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An integer overflow issue was found in the vmxnet3 NIC emulator of the QEMU for versions up to v5.2.0. It may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. 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
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
QEMU 输入验证错误漏洞
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 中存在输入验证错误漏洞。该漏洞源于攻击者可通过QEMU的vmxnet3触发整数溢出，以触发拒绝服务，并可能在主机系统上运行代码。
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 versions up to v5.2.0 -

II. Public POCs for CVE-2021-20203

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-20203

请登录查看更多情报信息。

Vendor Advisories for CVE-2021-20203 (2)

Mailing List Discussions for CVE-2021-20203 (2)

Other References for CVE-2021-20203 (1)

Same Patch Batch · n/a · 2021-02-25 · 10 CVEs total

CVE-2021-27670 Appspace 代码问题漏洞
CVE-2021-27671 Mozilla Rust 跨站脚本漏洞
CVE-2020-36254 Perth Dropbear 安全漏洞
CVE-2021-3273 Nagios XI 代码注入漏洞
CVE-2021-3124 WordPress 跨站脚本漏洞
CVE-2021-27330 Triconsole Datepicker Calendar 跨站脚本漏洞
CVE-2020-23534 Sven gopeak masterlab 代码问题漏洞
CVE-2020-27543 Paul Varache restify-paginate 安全漏洞
CVE-2021-3406 CNCF Keylime 信任管理问题漏洞

IV. Related Vulnerabilities

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

V. Comments for CVE-2021-20203

No comments yet

Leave a comment