gsd-2021-43783
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
@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.
Aliases
Aliases
CVE-2021-43783


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-43783",
    "description": "@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.",
    "id": "GSD-2021-43783"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-43783"
      ],
      "details": "@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.",
      "id": "GSD-2021-43783",
      "modified": "2023-12-13T01:23:26.055555Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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        "ID": "CVE-2021-43783",
        "STATE": "PUBLIC",
        "TITLE": "Path Traversal in @backstage/plugin-scaffolder-backend"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
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                    "version": {
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                          "version_value": "\u003c 0.15.14"
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          }
        ]
      },
      "impact": {
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          "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": {
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            "description": [
              {
                "lang": "eng",
                "value": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)"
              }
            ]
          }
        ]
      },
      "references": {
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          }
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      },
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        "discovery": "UNKNOWN"
      }
    },
    "gitlab.com": {
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        {
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          "affected_versions": "All versions before 0.15.14",
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          "cwe_ids": [
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            "CWE-937"
          ],
          "date": "2021-12-01",
          "description": "@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates.This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates.",
          "fixed_versions": [
            "0.15.14"
          ],
          "identifier": "CVE-2021-43783",
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          ],
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          "package_slug": "npm/@backstage/plugin-scaffolder-backend",
          "pubdate": "2021-12-01",
          "solution": "Upgrade to version 0.15.14 or above.",
          "title": "Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
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          "uuid": "544109c2-c07f-4a3e-81dd-7958091c1521"
        },
        {
          "affected_range": "\u003c0.15.14",
          "affected_versions": "All versions before 0.15.14",
          "cvss_v2": "AV:N/AC:L/Au:S/C:N/I:P/A:P",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L",
          "cwe_ids": [
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            "CWE-22",
            "CWE-937"
          ],
          "date": "2021-12-01",
          "description": "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.",
          "fixed_versions": [
            "0.15.14"
          ],
          "identifier": "CVE-2021-43783",
          "identifiers": [
            "CVE-2021-43783",
            "GHSA-mg3m-f475-28hv"
          ],
          "not_impacted": "All versions starting from 0.15.14",
          "package_slug": "npm/@backstage/techdocs-common",
          "pubdate": "2021-11-29",
          "solution": "Upgrade to version 0.15.14 or above.",
          "title": "Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-43783",
            "https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv",
            "https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f"
          ],
          "uuid": "b16c08ca-ee91-4389-b91a-aa9fc3cef168"
        }
      ]
    },
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                "cpe_name": [],
                "versionEndExcluding": "0.15.14",
                "vulnerable": true
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        "description": {
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            }
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      "impact": {
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          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 5.5,
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 8.0,
          "impactScore": 4.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
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            "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"
          },
          "exploitabilityScore": 3.1,
          "impactScore": 4.7
        }
      },
      "lastModifiedDate": "2021-12-01T19:41Z",
      "publishedDate": "2021-11-29T20:15Z"
    }
  }
}


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