Vulnerability-Lookup

CNVD-2021-12321

Vulnerability from cnvd - Published: 2021-02-24

Title

VMware ESXi OpenSLP堆溢出漏洞

Description

VMware ESXi 是VMware开放的服务器资源整合平台，可实现用较少的硬件集中管理多台服务器，并提升服务器性能和安全性。 VMware ESXi OpenSLP堆溢出漏洞。VMware ESXi OpenSLP堆溢出漏洞，与ESXi宿主机处于同一网段的攻击者利用该漏洞，向目标427端口发送恶意构造请求，从而触发OpenSLP服务堆溢出漏洞，导致远程代码执行。

Severity

高

Patch Name

VMware ESXi OpenSLP堆溢出漏洞的补丁

Patch Description

Formal description

目前，VMware官方已发布补丁修复此漏洞，CNVD建议用户立即升级至最新版本： https://www.vmware.com/security/advisories/VMSA-2021-0002.html

Reference

https://www.vmware.com/security/advisories/VMSA-2021-0002.html

Impacted products

Name
['VMWare VMware ESXi 6.5', 'VMWare VMware ESXi 6.7', 'VMWare VMware ESXi 7.0']

Show details on source website

JSON

To clipboard

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  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-21974"
    }
  },
  "description": "VMware ESXi \u662fVMware\u5f00\u653e\u7684\u670d\u52a1\u5668\u8d44\u6e90\u6574\u5408\u5e73\u53f0\uff0c\u53ef\u5b9e\u73b0\u7528\u8f83\u5c11\u7684\u786c\u4ef6\u96c6\u4e2d\u7ba1\u7406\u591a\u53f0\u670d\u52a1\u5668\uff0c\u5e76\u63d0\u5347\u670d\u52a1\u5668\u6027\u80fd\u548c\u5b89\u5168\u6027\u3002\n\nVMware ESXi OpenSLP\u5806\u6ea2\u51fa\u6f0f\u6d1e\u3002VMware ESXi OpenSLP\u5806\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u4e0eESXi\u5bbf\u4e3b\u673a\u5904\u4e8e\u540c\u4e00\u7f51\u6bb5\u7684\u653b\u51fb\u8005\u5229\u7528\u8be5\u6f0f\u6d1e\uff0c\u5411\u76ee\u6807427\u7aef\u53e3\u53d1\u9001\u6076\u610f\u6784\u9020\u8bf7\u6c42\uff0c\u4ece\u800c\u89e6\u53d1OpenSLP\u670d\u52a1\u5806\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u5bfc\u81f4\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u3002",
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-12321",
  "openTime": "2021-02-24",
  "patchDescription": "VMware ESXi \u662fVMware\u5f00\u653e\u7684\u670d\u52a1\u5668\u8d44\u6e90\u6574\u5408\u5e73\u53f0\uff0c\u53ef\u5b9e\u73b0\u7528\u8f83\u5c11\u7684\u786c\u4ef6\u96c6\u4e2d\u7ba1\u7406\u591a\u53f0\u670d\u52a1\u5668\uff0c\u5e76\u63d0\u5347\u670d\u52a1\u5668\u6027\u80fd\u548c\u5b89\u5168\u6027\u3002\r\n\r\nVMware ESXi OpenSLP\u5806\u6ea2\u51fa\u6f0f\u6d1e\u3002VMware ESXi OpenSLP\u5806\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u4e0eESXi\u5bbf\u4e3b\u673a\u5904\u4e8e\u540c\u4e00\u7f51\u6bb5\u7684\u653b\u51fb\u8005\u5229\u7528\u8be5\u6f0f\u6d1e\uff0c\u5411\u76ee\u6807427\u7aef\u53e3\u53d1\u9001\u6076\u610f\u6784\u9020\u8bf7\u6c42\uff0c\u4ece\u800c\u89e6\u53d1OpenSLP\u670d\u52a1\u5806\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u5bfc\u81f4\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "VMware ESXi OpenSLP\u5806\u6ea2\u51fa\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "VMWare VMware ESXi 6.5",
      "VMWare VMware ESXi 6.7",
      "VMWare VMware ESXi 7.0"
    ]
  },
  "referenceLink": "https://www.vmware.com/security/advisories/VMSA-2021-0002.html",
  "serverity": "\u9ad8",
  "submitTime": "2021-02-24",
  "title": "VMware ESXi OpenSLP\u5806\u6ea2\u51fa\u6f0f\u6d1e"
}

CVE-2021-21974 (GCVE-0-2021-21974)

Vulnerability from cvelistv5 – Published: 2021-02-24 16:57 – Updated: 2026-06-02 20:00

Summary

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.

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-02 20:00 UTC

CWE

OpenSLP heap-overflow vulnerability
CWE-787 - Out-of-bounds Write

Assigner

vmware CNA under the mitre root

CNA scorecard C 64/100 over 237 records in the last 180 days details

References

3 references

URL	Tags
https://www.vmware.com/security/advisories/VMSA-2…	x_refsource_CONFIRM
https://www.zerodayinitiative.com/advisories/ZDI-…	x_refsource_MISC
http://packetstormsecurity.com/files/162957/VMwar…	x_refsource_MISC

Impacted products

2 products

Vendor	Product	Version
n/a	VMware ESXi	Affected: 7.0 before ESXi70U1c-17325551 Affected: 6.7 before ESXi670-202102401-SG Affected: 6.5 before ESXi650-202102101-SG
n/a	VMware Cloud Foundation	Affected: 4.x before 4.2 and 3.x

Show details on NVD website

JSON

To clipboard

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        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:30:23.578Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
          {
            "tags": [
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            ],
            "url": "https://www.vmware.com/security/advisories/VMSA-2021-0002.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-250/"
          },
          {
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              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/162957/VMware-ESXi-OpenSLP-Heap-Overflow.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "ADJACENT_NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 8.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-21974",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-02T20:00:30.249549Z",
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          "dateUpdated": "2026-06-02T20:00:52.080Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        },
        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
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          "vendor": "n/a",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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