CVE-2021-21995
Quick assessment
Affected
n/a VMware ESXi and VMware Cloud Foundation
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.
VMware ESXi是美国威睿（VMware）公司的一套可直接安装在物理服务器上的服务器虚拟化平台。 VMware ESXi 中存在缓冲区错误漏洞，该漏洞源于产品中的OpenSLP对堆内存进行越界读取，攻击者可通过服务的427端口进行恶意访问进而触发漏洞导致系统拒绝服务。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-21995
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
OpenSLP as used in ESXi has a denial-of-service vulnerability due a heap out-of-bounds read issue. A malicious actor with network access to port 427 on ESXi may be able to trigger a heap out-of-bounds read in OpenSLP service resulting in a denial-of-service condition.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
VMware ESXi 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
VMware ESXi是美国威睿（VMware）公司的一套可直接安装在物理服务器上的服务器虚拟化平台。 VMware ESXi 中存在缓冲区错误漏洞，该漏洞源于产品中的OpenSLP对堆内存进行越界读取，攻击者可通过服务的427端口进行恶意访问进而触发漏洞导致系统拒绝服务。
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 |
|---|---|---|---|---|
| - | VMware ESXi and VMware Cloud Foundation | VMware ESXi(7.0 before ESXi70U2-17630552, 6.7 before ESXi670-202103101-SG, 6.5 before ESXi650-202107401-SG) and VMware Cloud Foundation (4.x, 3.x before 3.10.2) | - |
|
II. Public POCs for CVE-2021-21995
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2021-21995 (1)
-
https://www.vmware.com/security/advisories/VMSA-2021-0014.html x_refsource_MISC
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| CVE-2021-21994 | VMware ESXi 授权问题漏洞 | |
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| CVE-2020-19719 | Bento4 安全漏洞 | |
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IV. Related Vulnerabilities
V. Comments for CVE-2021-21995
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