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

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2021-20257

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 中的e1000 存在安全漏洞，攻击者可利用该漏洞触发拒绝服务。

AI Predicted 6.5 Difficulty: Easy EPSS 0.37% · P30
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-20257

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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 infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles 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
不可达退出条件的循环(无限循环)
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 中的e1000 存在安全漏洞，攻击者可利用该漏洞触发拒绝服务。
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 Fixed-In v6.2.0 -

II. Public POCs for CVE-2021-20257

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-20257

请登录查看更多情报信息。

Patches & Fixes for CVE-2021-20257 (1)

Vendor Advisories for CVE-2021-20257 (3)

Mailing List Discussions for CVE-2021-20257 (3)

Same Patch Batch · n/a · 2022-03-16 · 80 CVEs total

CVE-2022-23812 9.8 CRITICAL Malicious Package
CVE-2021-23648 5.4 MEDIUM Cross-site Scripting (XSS)
CVE-2022-21164 3.7 LOW Denial of Service (DoS)
CVE-2021-39695 Google Android 权限许可和访问控制问题漏洞
CVE-2021-39707 Google Android 权限许可和访问控制问题漏洞
CVE-2021-39689 Google Android 数据伪造问题漏洞
CVE-2021-39667 Google Android 缓冲区错误漏洞
CVE-2021-39624 Google Android 资源管理错误漏洞
CVE-2021-0957 Google Android 权限许可和访问控制问题漏洞
CVE-2021-39793 Google Android 缓冲区错误漏洞
CVE-2021-39685 Google Android 缓冲区错误漏洞
CVE-2021-39693 Google Android 缓冲区错误漏洞
CVE-2021-39694 Google Android 权限许可和访问控制问题漏洞
CVE-2021-39690 Google Android 输入验证错误漏洞
CVE-2021-39697 Google Android 权限许可和访问控制问题漏洞
CVE-2021-39698 Google Android 资源管理错误漏洞
CVE-2021-39701 Google Android 输入验证错误漏洞
CVE-2021-39702 Google Android 权限许可和访问控制问题漏洞
CVE-2021-39703 Google Android 权限许可和访问控制问题漏洞
CVE-2021-39704 Google Android 权限许可和访问控制问题漏洞

Showing top 20 of 80 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: QEMU
Same vendor: n/a
Same weakness: CWE-835

V. Comments for CVE-2021-20257

No comments yet

Leave a comment