cnvd - cnvd-2021-92464

cnvd-2021-92464

Vulnerability from cnvd

Title: backstage跨站脚本漏洞

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存在跨站脚本漏洞，该漏洞源于在受影响的版本中，auth-backend插件缺少针对URL参数的过滤与转义。攻击者可利用该漏洞从用户的浏览器中窃取访问令牌或其他秘密。

Severity: 高

Patch Name: backstage跨站脚本漏洞的补丁

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存在跨站脚本漏洞，该漏洞源于在受影响的版本中，auth-backend插件缺少针对URL参数的过滤与转义。攻击者可利用该漏洞从用户的浏览器中窃取访问令牌或其他秘密。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:

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://github.com/backstage/backstage/security/advisories/GHSA-w7fj-336r-vw49

Reference: https://nvd.nist.gov/vuln/detail/CVE-2021-43776

Impacted products

Name
Backstage Backstage

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-43776"
    }
  },
  "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\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728\u53d7\u5f71\u54cd\u7684\u7248\u672c\u4e2d\uff0cauth-backend\u63d2\u4ef6\u7f3a\u5c11\u9488\u5bf9URL\u53c2\u6570\u7684\u8fc7\u6ee4\u4e0e\u8f6c\u4e49\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u4ece\u7528\u6237\u7684\u6d4f\u89c8\u5668\u4e2d\u7a83\u53d6\u8bbf\u95ee\u4ee4\u724c\u6216\u5176\u4ed6\u79d8\u5bc6\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://github.com/backstage/backstage/security/advisories/GHSA-w7fj-336r-vw49",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-92464",
  "openTime": "2021-11-30",
  "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\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728\u53d7\u5f71\u54cd\u7684\u7248\u672c\u4e2d\uff0cauth-backend\u63d2\u4ef6\u7f3a\u5c11\u9488\u5bf9URL\u53c2\u6570\u7684\u8fc7\u6ee4\u4e0e\u8f6c\u4e49\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u4ece\u7528\u6237\u7684\u6d4f\u89c8\u5668\u4e2d\u7a83\u53d6\u8bbf\u95ee\u4ee4\u724c\u6216\u5176\u4ed6\u79d8\u5bc6\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\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Backstage Backstage"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-43776",
  "serverity": "\u9ad8",
  "submitTime": "2021-11-30",
  "title": "backstage\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e"
}

CVE-2021-43776 (GCVE-0-2021-43776)

Vulnerability from cvelistv5

Published

2021-11-26 18:15

Modified

2024-08-04 04:03

Severity ?

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

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Summary

Backstage is an open platform for building developer portals. In affected versions the auth-backend plugin allows a malicious actor to trick another user into visiting a vulnerable URL that executes an XSS attack. This attack can potentially allow the attacker to exfiltrate access tokens or other secrets from the user's browser. The default CSP does prevent this attack, but it is expected that some deployments have these policies disabled due to incompatibilities. This is vulnerability is patched in version `0.4.9` of `@backstage/plugin-auth-backend`.

References

▼	URL	Tags
	https://github.com/backstage/backstage/security/advisories/GHSA-w7fj-336r-vw49	x_refsource_CONFIRM
	https://github.com/backstage/backstage/tree/master/plugins/auth-backend	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	backstage	backstage	Version: < 0.4.9

Show details on NVD website

JSON

To clipboard

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            "url": "https://github.com/backstage/backstage/tree/master/plugins/auth-backend"
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        }
      ],
      "metrics": [
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            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
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}

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.

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