Vulnerability-Lookup

CNVD-2021-05458

Vulnerability from cnvd - Published: 2021-01-24

Title

IBM AIX访问控制错误漏洞

Description

IBM AIX是美国IBM公司的一款为 IBM Power 体系架构开发的一种基于开放标准的 UNIX 操作系统。 IBM AIX 7.1, 7.2 and AIX VIOS 3.1存在访问控制错误漏洞，该漏洞允许本地用户利用gencore user命令中的漏洞在任何目录中创建任意文件。目前没有详细的漏洞细节提供。

Severity

低

Patch Name

IBM AIX访问控制错误漏洞的补丁

Patch Description

IBM AIX是美国IBM公司的一款为 IBM Power 体系架构开发的一种基于开放标准的 UNIX 操作系统。 IBM AIX 7.1, 7.2 and AIX VIOS 3.1存在访问控制错误漏洞，该漏洞允许本地用户利用gencore user命令中的漏洞在任何目录中创建任意文件。目前没有详细的漏洞细节提供。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://www.ibm.com/support/pages/node/6406022

Reference

https://www.ibm.com/blogs/psirt/security-bulletin-vulnerability-in-gencore-affects-aix-cve-2020-4887/

Impacted products

Name
['IBM IBM AIX 7.1', 'IBM IBM AIX 7.2', 'IBM IBM AIX VIOS 3.1']

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-4887",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-4887"
    }
  },
  "description": "IBM AIX\u662f\u7f8e\u56fdIBM\u516c\u53f8\u7684\u4e00\u6b3e\u4e3a IBM Power \u4f53\u7cfb\u67b6\u6784\u5f00\u53d1\u7684\u4e00\u79cd\u57fa\u4e8e\u5f00\u653e\u6807\u51c6\u7684 UNIX \u64cd\u4f5c\u7cfb\u7edf\u3002\n\nIBM AIX 7.1, 7.2 and AIX VIOS 3.1\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u5141\u8bb8\u672c\u5730\u7528\u6237\u5229\u7528gencore user\u547d\u4ee4\u4e2d\u7684\u6f0f\u6d1e\u5728\u4efb\u4f55\u76ee\u5f55\u4e2d\u521b\u5efa\u4efb\u610f\u6587\u4ef6\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://www.ibm.com/support/pages/node/6406022",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-05458",
  "openTime": "2021-01-24",
  "patchDescription": "IBM AIX\u662f\u7f8e\u56fdIBM\u516c\u53f8\u7684\u4e00\u6b3e\u4e3a IBM Power \u4f53\u7cfb\u67b6\u6784\u5f00\u53d1\u7684\u4e00\u79cd\u57fa\u4e8e\u5f00\u653e\u6807\u51c6\u7684 UNIX \u64cd\u4f5c\u7cfb\u7edf\u3002\r\n\r\nIBM AIX 7.1, 7.2 and AIX VIOS 3.1\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u5141\u8bb8\u672c\u5730\u7528\u6237\u5229\u7528gencore user\u547d\u4ee4\u4e2d\u7684\u6f0f\u6d1e\u5728\u4efb\u4f55\u76ee\u5f55\u4e2d\u521b\u5efa\u4efb\u610f\u6587\u4ef6\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\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": "IBM AIX\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "IBM IBM AIX 7.1",
      "IBM IBM AIX 7.2",
      "IBM IBM AIX VIOS 3.1"
    ]
  },
  "referenceLink": "https://www.ibm.com/blogs/psirt/security-bulletin-vulnerability-in-gencore-affects-aix-cve-2020-4887/",
  "serverity": "\u4f4e",
  "submitTime": "2021-01-22",
  "title": "IBM AIX\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2020-4887 (GCVE-0-2020-4887)

Vulnerability from cvelistv5 – Published: 2021-01-20 15:00 – Updated: 2024-09-16 19:56

Summary

IBM AIX 7.1, 7.2 and AIX VIOS 3.1 could allow a local user to exploit a vulnerability in the gencore user command to create arbitrary files in any directory. IBM X-Force ID: 190911.

Severity

6.2 (Medium)


                        
                          CVSS:3.0/C:N/I:H/AC:L/AV:L/A:N/S:U/PR:N/UI:N/E:U/RL:O/RC:C

CWE

Data Manipulation

Assigner

ibm CNA under the mitre root

CNA scorecard B 88/100 over 1630 records in the last 180 days details

References

2 references

URL	Tags
https://www.ibm.com/support/pages/node/6406022	x_refsource_CONFIRM
https://exchange.xforce.ibmcloud.com/vulnerabilit…	vdb-entryx_refsource_XF

Impacted products

2 products

Vendor	Product	Version
IBM	AIX	Affected: 7.1 Affected: 7.2
IBM	VIOS	Affected: 3.1

Date Public

2021-01-19 00:00

Show details on NVD website

JSON

To clipboard

{
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          "dateUpdated": "2024-08-04T08:14:59.190Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            ],
            "url": "https://www.ibm.com/support/pages/node/6406022"
          },
          {
            "name": "ibm-aix-cve20204887-file-write (190911)",
            "tags": [
              "vdb-entry",
              "x_refsource_XF",
              "x_transferred"
            ],
            "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/190911"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "AIX",
          "vendor": "IBM",
          "versions": [
            {
              "status": "affected",
              "version": "7.1"
            },
            {
              "status": "affected",
              "version": "7.2"
            }
          ]
        },
        {
          "product": "VIOS",
          "vendor": "IBM",
          "versions": [
            {
              "status": "affected",
              "version": "3.1"
            }
          ]
        }
      ],
      "datePublic": "2021-01-19T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "IBM AIX 7.1, 7.2 and AIX VIOS 3.1 could allow a local user to exploit a vulnerability in the gencore user command to create arbitrary files in any directory. IBM X-Force ID: 190911."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 6.2,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 5.4,
            "temporalSeverity": "MEDIUM",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/C:N/I:H/AC:L/AV:L/A:N/S:U/PR:N/UI:N/E:U/RL:O/RC:C",
            "version": "3.0"
          }
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      ],
      "problemTypes": [
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          "descriptions": [
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              "lang": "en",
              "type": "text"
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        "dateUpdated": "2021-01-20T15:00:27.000Z",
        "orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
        "shortName": "ibm"
      },
      "references": [
        {
          "tags": [
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          ],
          "url": "https://www.ibm.com/support/pages/node/6406022"
        },
        {
          "name": "ibm-aix-cve20204887-file-write (190911)",
          "tags": [
            "vdb-entry",
            "x_refsource_XF"
          ],
          "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/190911"
        }
      ],
      "x_legacyV4Record": {
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          "ASSIGNER": "psirt@us.ibm.com",
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          "STATE": "PUBLIC"
        },
        "affects": {
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            "vendor_data": [
              {
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                    {
                      "product_name": "AIX",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "7.1"
                          },
                          {
                            "version_value": "7.2"
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "VIOS",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "3.1"
                          }
                        ]
                      }
                    }
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                },
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              "AC": "L",
              "AV": "L",
              "C": "N",
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              "RC": "C",
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        "problemtype": {
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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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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

Related by attack behaviour

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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