Vulnerability-Lookup

CNVD-2022-55686

Vulnerability from cnvd - Published: 2022-08-08

Title

Google kCTF访问控制错误漏洞

Description

Google kCTF是美国谷歌（Google）公司的一个基于 Kubernetes 的CTF竞赛基础设施。 Google kCTF v1.6.0之前版本存在访问控制错误漏洞，该漏洞源于kctf集群存在不当的访问控制，攻击者可利用该漏洞破坏kctf的ip源范围设置。

Severity

中

Patch Name

Google kCTF访问控制错误漏洞的补丁

Patch Description

Google kCTF是美国谷歌（Google）公司的一个基于 Kubernetes 的CTF竞赛基础设施。 Google kCTF v1.6.0之前版本存在访问控制错误漏洞，该漏洞源于kctf集群存在不当的访问控制，攻击者可利用该漏洞破坏kctf的ip源范围设置。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://github.com/google/kctf/security/advisories/GHSA-4g2v-6qc6-6jv5

Reference

https://nvd.nist.gov/vuln/detail/CVE-2022-31055

Impacted products

Name
Google kCTF <v1.6.0

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2022-31055",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2022-31055"
    }
  },
  "description": "Google kCTF\u662f\u7f8e\u56fd\u8c37\u6b4c\uff08Google\uff09\u516c\u53f8\u7684\u4e00\u4e2a\u57fa\u4e8e Kubernetes \u7684CTF\u7ade\u8d5b\u57fa\u7840\u8bbe\u65bd\u3002\n\nGoogle kCTF v1.6.0\u4e4b\u524d\u7248\u672c\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8ekctf\u96c6\u7fa4\u5b58\u5728\u4e0d\u5f53\u7684\u8bbf\u95ee\u63a7\u5236\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7834\u574fkctf\u7684ip\u6e90\u8303\u56f4\u8bbe\u7f6e\u3002",
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2022-55686",
  "openTime": "2022-08-08",
  "patchDescription": "Google kCTF\u662f\u7f8e\u56fd\u8c37\u6b4c\uff08Google\uff09\u516c\u53f8\u7684\u4e00\u4e2a\u57fa\u4e8e Kubernetes \u7684CTF\u7ade\u8d5b\u57fa\u7840\u8bbe\u65bd\u3002\r\n\r\nGoogle kCTF v1.6.0\u4e4b\u524d\u7248\u672c\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8ekctf\u96c6\u7fa4\u5b58\u5728\u4e0d\u5f53\u7684\u8bbf\u95ee\u63a7\u5236\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7834\u574fkctf\u7684ip\u6e90\u8303\u56f4\u8bbe\u7f6e\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": "Google kCTF\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Google kCTF \u003cv1.6.0"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2022-31055",
  "serverity": "\u4e2d",
  "submitTime": "2022-06-15",
  "title": "Google kCTF\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2022-31055 (GCVE-0-2022-31055)

Vulnerability from cvelistv5 – Published: 2022-06-13 15:40 – Updated: 2025-04-23 18:16

Title

Improper Access Control in kctf

Summary

kCTF is a Kubernetes-based infrastructure for capture the flag (CTF) competitions. Prior to version 1.6.0, the kctf cluster set-src-ip-ranges was broken and allowed traffic from any IP. The problem has been patched in v1.6.0. As a workaround, those who want to test challenges privately can mark them as `public: false` and use `kctf chal debug port-forward` to connect.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-23 15:54 UTC

CWE

CWE-284 - Improper Access Control

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/google/kctf/security/advisorie…	x_refsource_CONFIRM
https://github.com/google/kctf/pull/371	x_refsource_MISC
https://github.com/google/kctf/commit/8cf050be974…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
google	kctf	Affected: < 1.6.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T07:03:40.255Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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        "references": [
          {
            "tags": [
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              "x_transferred"
            ],
            "url": "https://github.com/google/kctf/security/advisories/GHSA-4g2v-6qc6-6jv5"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/google/kctf/pull/371"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/google/kctf/commit/8cf050be974fcc2fd8aa136701f9a66f2b2a5202"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-31055",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-04-23T15:54:20.011870Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-04-23T18:16:41.999Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "kctf",
          "vendor": "google",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.6.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "kCTF is a Kubernetes-based infrastructure for capture the flag (CTF) competitions. Prior to version 1.6.0, the kctf cluster set-src-ip-ranges was broken and allowed traffic from any IP. The problem has been patched in v1.6.0. As a workaround, those who want to test challenges privately can mark them as `public: false` and use `kctf chal debug port-forward` to connect."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-284",
              "description": "CWE-284: Improper Access Control",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-06-13T15:40:10.000Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      },
      "references": [
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        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/google/kctf/pull/371"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/google/kctf/commit/8cf050be974fcc2fd8aa136701f9a66f2b2a5202"
        }
      ],
      "source": {
        "advisory": "GHSA-4g2v-6qc6-6jv5",
        "discovery": "UNKNOWN"
      },
      "title": "Improper Access Control in kctf",
      "x_legacyV4Record": {
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          "ID": "CVE-2022-31055",
          "STATE": "PUBLIC",
          "TITLE": "Improper Access Control in kctf"
        },
        "affects": {
          "vendor": {
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              {
                "product": {
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                    {
                      "product_name": "kctf",
                      "version": {
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                          {
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                          }
                        ]
                      }
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        "data_format": "MITRE",
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        "description": {
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            }
          ]
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        "impact": {
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            "baseScore": 7.5,
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
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                  "value": "CWE-284: Improper Access Control"
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            {
              "name": "https://github.com/google/kctf/security/advisories/GHSA-4g2v-6qc6-6jv5",
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            },
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              "refsource": "MISC",
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2022-31055",
    "datePublished": "2022-06-13T15:40:10.000Z",
    "dateReserved": "2022-05-18T00:00:00.000Z",
    "dateUpdated": "2025-04-23T18:16:41.999Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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CNVD-2022-55686

CVE-2022-31055 (GCVE-0-2022-31055)

Tags

Sightings

Nomenclature

Related by attack behaviour