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CVE-2021-21974

Quick assessment

Affected
n/a VMware ESXi
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Vmware 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。 ESXi 存在安全漏洞，该漏洞源于同一网段的恶意行为者可以访问端口427，导致远程代码执行。以下产品及版本受到影响：7.0 before ESXi70U1c-17325551, 6.7 before ESXi670-202102401-SG, 6.5 before ESXi650-202102101-SG。

AI Predicted 9.8 Difficulty: Easy EPSS 45.06% · P99

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 4

VendorProduct Version RangeStatus
n/a VMware Cloud Foundation 4.x before 4.2 and 3.x affected
n/a VMware ESXi 7.0 before ESXi70U1c-17325551 affected
6.7 before ESXi670-202102401-SG affected
6.5 before ESXi650-202102101-SG affected
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I. Basic Information for CVE-2021-21974

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
OpenSLP as used in ESXi (7.0 before ESXi70U1c-17325551, 6.7 before ESXi670-202102401-SG, 6.5 before ESXi650-202102101-SG) has a heap-overflow vulnerability. A malicious actor residing within the same network segment as ESXi who has access to port 427 may be able to trigger the heap-overflow issue in OpenSLP service resulting in remote code execution.
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
威睿 VMware ESXi 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vmware 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。 ESXi 存在安全漏洞，该漏洞源于同一网段的恶意行为者可以访问端口427，导致远程代码执行。以下产品及版本受到影响：7.0 before ESXi70U1c-17325551, 6.7 before ESXi670-202102401-SG, 6.5 before ESXi650-202102101-SG。
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 7.0 before ESXi70U1c-17325551 -
- VMware Cloud Foundation 4.x before 4.2 and 3.x -

II. Public POCs for CVE-2021-21974

# POC Description Source Link Shenlong Link
1 POC for CVE-2021-21974 VMWare ESXi RCE Exploit https://github.com/Shadow0ps/CVE-2021-21974 POC Details
2 Analysis of the ransom demands from Shodan results https://github.com/n2x4/Feb2023-CVE-2021-21974-OSINT POC Details
3 ESXi EZ - A custom scanner that takes list of IPs either in JSON, CSV or individually and checks for infection CVE-2021-21974 https://github.com/CYBERTHREATANALYSIS/ESXi_ransomware_scanner POC Details
4 Nmap NSE script for cve-2021-21974 https://github.com/hateme021202/cve-2021-21974 POC Details
5 ESXi EZ - A custom scanner that takes list of IPs either in JSON, CSV or individually and checks for infection CVE-2021-21974 https://github.com/CYBERTHREATANALYSIS/ESXi-Ransomware-Scanner-mi POC Details
6 None https://github.com/mercylessghost/CVE-2021-21974 POC Details
7 CVE-2021-21974 Vulnerability Detection Tool Safe PoC that identifies vulnerable SLP implementations without exploitation https://github.com/abirasecurity/CVE-2021-21974_vuln_dectection POC Details
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III. Intelligence Information for CVE-2021-21974

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Vendor Advisories for CVE-2021-21974 (2)

Exploits & Public PoCs for CVE-2021-21974 (1)

Same Patch Batch · n/a · 2021-02-24 · 10 CVEs total

CVE-2020-11987 Apache Batik 代码问题漏洞
CVE-2021-27645 GNU C Library和glibc 资源管理错误漏洞
CVE-2020-12702 eWeLink mobile application 加密问题漏洞
CVE-2021-3355 LightCMS v跨站脚本漏洞
CVE-2020-28599 Torsten Paul Openscad 缓冲区错误漏洞
CVE-2021-22667 Advantech BB-ESWGP506-2SFP-T 信任管理问题漏洞
CVE-2021-21973 VMware vCenter Server 代码问题漏洞
CVE-2021-21972 VMware vSphere Client 路径遍历漏洞
CVE-2020-11988 Apache XmlGraphics Commons 代码问题漏洞

IV. Related Vulnerabilities

Same product: VMware ESXi
Same vendor: n/a

V. Comments for CVE-2021-21974

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