cnvd - cnvd-2021-100277

cnvd-2021-100277

Vulnerability from cnvd

Title: backstage路径遍历漏洞

Description:

backstage是一个应用软件。后台是一个开放的平台,用于构建开发者门户

Backstage存在路径遍历漏洞，该漏洞源于产品未对具有scaffold模板写权限的用户的写入路径进行有效限制，攻击者可利用该漏洞将文件写入到任一目录。

Severity: 中

Patch Name: backstage路径遍历漏洞的补丁

Patch Description:

backstage是一个应用软件。后台是一个开放的平台,用于构建开发者门户

Backstage存在路径遍历漏洞，该漏洞源于产品未对具有scaffold模板写权限的用户的写入路径进行有效限制，攻击者可利用该漏洞将文件写入到任一目录。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/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv

Reference: https://nvd.nist.gov/vuln/detail/CVE-2021-43783

Impacted products

Name
Backstage Backstage <0.15.14

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-43783"
    }
  },
  "description": "backstage\u662f\u4e00\u4e2a\u5e94\u7528\u8f6f\u4ef6\u3002\u540e\u53f0\u662f\u4e00\u4e2a\u5f00\u653e\u7684\u5e73\u53f0,\u7528\u4e8e\u6784\u5efa\u5f00\u53d1\u8005\u95e8\u6237\n\nBackstage\u5b58\u5728\u8def\u5f84\u904d\u5386\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4ea7\u54c1\u672a\u5bf9\u5177\u6709scaffold\u6a21\u677f\u5199\u6743\u9650\u7684\u7528\u6237\u7684\u5199\u5165\u8def\u5f84\u8fdb\u884c\u6709\u6548\u9650\u5236\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5c06\u6587\u4ef6\u5199\u5165\u5230\u4efb\u4e00\u76ee\u5f55\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://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-100277",
  "openTime": "2021-12-16",
  "patchDescription": "backstage\u662f\u4e00\u4e2a\u5e94\u7528\u8f6f\u4ef6\u3002\u540e\u53f0\u662f\u4e00\u4e2a\u5f00\u653e\u7684\u5e73\u53f0,\u7528\u4e8e\u6784\u5efa\u5f00\u53d1\u8005\u95e8\u6237\r\n\r\nBackstage\u5b58\u5728\u8def\u5f84\u904d\u5386\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4ea7\u54c1\u672a\u5bf9\u5177\u6709scaffold\u6a21\u677f\u5199\u6743\u9650\u7684\u7528\u6237\u7684\u5199\u5165\u8def\u5f84\u8fdb\u884c\u6709\u6548\u9650\u5236\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5c06\u6587\u4ef6\u5199\u5165\u5230\u4efb\u4e00\u76ee\u5f55\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": "backstage\u8def\u5f84\u904d\u5386\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Backstage Backstage \u003c0.15.14"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-43783",
  "serverity": "\u4e2d",
  "submitTime": "2021-12-01",
  "title": "backstage\u8def\u5f84\u904d\u5386\u6f0f\u6d1e"
}

CVE-2021-43783 (GCVE-0-2021-43783)

Vulnerability from cvelistv5

Published

2021-11-29 19:20

Modified

2024-08-04 04:03

Severity ?

8.5 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Summary

@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates. In affected versions a malicious actor with write access to a registered scaffolder template is able to manipulate the template in a way that writes files to arbitrary paths on the scaffolder-backend host instance. This vulnerability can in some situation also be exploited through user input when executing a template, meaning you do not need write access to the templates. This method will not allow the attacker to control the contents of the injected file however, unless the template is also crafted in a specific way that gives control of the file contents. This vulnerability is fixed in version `0.15.14` of the `@backstage/plugin-scaffolder-backend`. This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates.

References

▼	URL	Tags
	https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv	x_refsource_CONFIRM
	https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	backstage	backstage	Version: < 0.15.14

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T04:03:08.643Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "backstage",
          "vendor": "backstage",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.15.14"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates. In affected versions a malicious actor with write access to a registered scaffolder template is able to manipulate the template in a way that writes files to arbitrary paths on the scaffolder-backend host instance. This vulnerability can in some situation also be exploited through user input when executing a template, meaning you do not need write access to the templates. This method will not allow the attacker to control the contents of the injected file however, unless the template is also crafted in a specific way that gives control of the file contents. This vulnerability is fixed in version `0.15.14` of the `@backstage/plugin-scaffolder-backend`. This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-11-29T19:20:09",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f"
        }
      ],
      "source": {
        "advisory": "GHSA-mg3m-f475-28hv",
        "discovery": "UNKNOWN"
      },
      "title": "Path Traversal in @backstage/plugin-scaffolder-backend",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security-advisories@github.com",
          "ID": "CVE-2021-43783",
          "STATE": "PUBLIC",
          "TITLE": "Path Traversal in @backstage/plugin-scaffolder-backend"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "backstage",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "\u003c 0.15.14"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "backstage"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates. In affected versions a malicious actor with write access to a registered scaffolder template is able to manipulate the template in a way that writes files to arbitrary paths on the scaffolder-backend host instance. This vulnerability can in some situation also be exploited through user input when executing a template, meaning you do not need write access to the templates. This method will not allow the attacker to control the contents of the injected file however, unless the template is also crafted in a specific way that gives control of the file contents. This vulnerability is fixed in version `0.15.14` of the `@backstage/plugin-scaffolder-backend`. This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates."
            }
          ]
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv",
              "refsource": "CONFIRM",
              "url": "https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv"
            },
            {
              "name": "https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f",
              "refsource": "MISC",
              "url": "https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f"
            }
          ]
        },
        "source": {
          "advisory": "GHSA-mg3m-f475-28hv",
          "discovery": "UNKNOWN"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2021-43783",
    "datePublished": "2021-11-29T19:20:09",
    "dateReserved": "2021-11-16T00:00:00",
    "dateUpdated": "2024-08-04T04:03:08.643Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted