CVE-2021-3653
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I. Basic Information for CVE-2021-3653
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)
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 |
|---|
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- https://bugzilla.redhat.com/show_bug.cgi?id=1983686x_refsource_MISC
- https://www.openwall.com/lists/oss-security/2021/08/16/1x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-3653
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
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Information Leakage in kernel
Same vendor: n/a
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Open5GS SMF OpenAPI_list_create denial of service
Same weakness: CWE-862
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V. Comments for CVE-2021-3653
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