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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2021-3653

Quick assessment

Affected
n/a kernel
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.

KVM是基于内核的虚拟机。 KVM 的 AMD 代码中存在权限许可和访问控制问题漏洞，该漏洞源于在处理 L1 来宾提供的 VMCB（虚拟机控制块）以生成/处理嵌套来宾 (L2) 时对“int_ctl”的不正确验证。

AI Predicted 9.8 Difficulty: Moderate EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-3653

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "int_ctl" field, this issue could allow a malicious L1 to enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape. This flaw affects Linux kernel versions prior to 5.14-rc7.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
KVM 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
KVM是基于内核的虚拟机。 KVM 的 AMD 代码中存在权限许可和访问控制问题漏洞，该漏洞源于在处理 L1 来宾提供的 VMCB（虚拟机控制块）以生成/处理嵌套来宾 (L2) 时对“int_ctl”的不正确验证。
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
- kernel kernel 5.14-rc7 -

II. Public POCs for CVE-2021-3653

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-3653

请登录查看更多情报信息。

Vendor Advisories for CVE-2021-3653 (1)

Exploits & Public PoCs for CVE-2021-3653 (1)

Mailing List Discussions for CVE-2021-3653 (3)

Same Patch Batch · n/a · 2021-09-29 · 21 CVEs total

CVE-2021-23446 7.5 HIGH Regular Expression Denial of Service (ReDoS)
CVE-2021-41573 7.5 HIGH Hitachi Content Platform Anywhere (HCP-AW) 信息泄露漏洞
CVE-2021-35945 Couchbase Server 缓冲区错误漏洞
CVE-2021-22947 Migration Toolkit For Containers 数据伪造问题漏洞
CVE-2021-22946 libcurl 安全漏洞
CVE-2021-33923 Confluent Ansible 安全漏洞
CVE-2021-33924 Confluent Ansible 安全漏洞
CVE-2021-40651 OS4Ed OpenSIS 路径遍历漏洞
CVE-2021-41732 Zeek 环境问题漏洞
CVE-2021-41764 Streama 跨站请求伪造漏洞
CVE-2021-41826 PlaceOs Authentication Service 输入验证错误漏洞
CVE-2021-35943 Couchbase Server 授权问题漏洞
CVE-2021-35944 Couchbase Server 缓冲区错误漏洞
CVE-2021-41795 Apple Safari 安全漏洞
CVE-2020-20128 LaraCms 信息泄露漏洞
CVE-2020-20129 LaraCms 跨站脚本漏洞
CVE-2020-20131 LaraCms 跨站脚本漏洞
CVE-2020-20781 UCMS 跨站脚本漏洞
CVE-2021-41821 Wazuh 数字错误漏洞
CVE-2021-41824 Pixel＆tonic Craft CMS 代码注入漏洞

IV. Related Vulnerabilities

Same product: kernel
Same vendor: n/a
Same weakness: CWE-862

V. Comments for CVE-2021-3653

No comments yet

Leave a comment