Vulnerability-Lookup

CNVD-2021-100277

Vulnerability from cnvd - Published: 2021-12-16

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 – Updated: 2024-08-04 04:03

Title

Path Traversal in @backstage/plugin-scaffolder-backend

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.

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')

Assigner

GitHub_M mitre root

References

2 references

URL	Tags
https://github.com/backstage/backstage/security/a…	x_refsource_CONFIRM
https://github.com/backstage/backstage/commit/f93…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
backstage	backstage	Affected: < 0.15.14

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2024-08-04T04:03:08.643Z",
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          {
            "tags": [
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              "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": {
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          "product": "backstage",
          "vendor": "backstage",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.15.14"
            }
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        }
      ],
      "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",
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            "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": [
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            }
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        },
        {
          "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": {
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          "ID": "CVE-2021-43783",
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        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "backstage",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "\u003c 0.15.14"
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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.

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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CNVD-2021-100277

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

Tags

Sightings

Nomenclature

Related by attack behaviour