GHSA-5V95-V8C8-3RH6

Vulnerability from github – Published: 2021-05-21 14:32 – Updated: 2021-05-20 22:26
VLAI?
Summary
Privilege escalation in rbac
Details

Impact

Using a carefully crafted request or malicious proxy, a user with UserWrite permissions could create another user with higher privileges than their own due to insufficient checks on the allowed set of permissions. The event would be captured in the Event Log.

Patches

The issue has been fixed in 0.24.0 and 0.23.1.

Workarounds

For users who are unable to upgrade, we recommend auditing users who have UserWrite permissions and regularly reviewing the Event Log for malicious activity.

Kudos

Thank you to Michael Mazzolini (Ethical Hacker at WHO) for finding and disclosing this vulnerability.

Severity ?
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 0.23.0"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/google/exposure-notifications-verification-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.23.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-22538"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-276"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-05-20T22:26:21Z",
    "nvd_published_at": "2021-03-31T21:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nUsing a carefully crafted request or malicious proxy, a user with `UserWrite` permissions could create another user with higher privileges than their own due to insufficient checks on the allowed set of permissions. The event would be captured in the Event Log.\n\n### Patches\nThe issue has been fixed in 0.24.0 and 0.23.1.\n\n### Workarounds\nFor users who are unable to upgrade, we recommend auditing users who have `UserWrite` permissions and regularly reviewing the Event Log for malicious activity.\n\n### Kudos\nThank you to Michael Mazzolini (Ethical Hacker at WHO) for finding and disclosing this vulnerability.",
  "id": "GHSA-5v95-v8c8-3rh6",
  "modified": "2021-05-20T22:26:21Z",
  "published": "2021-05-21T14:32:55Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/google/exposure-notifications-verification-server/security/advisories/GHSA-5v95-v8c8-3rh6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-22538"
    },
    {
      "type": "WEB",
      "url": "https://github.com/google/exposure-notifications-verification-server/commit/eb8cf40b12dbe79304f1133c06fb73419383cd95"
    },
    {
      "type": "WEB",
      "url": "https://github.com/google/exposure-notifications-verification-server/releases/tag/v0.23.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/google/exposure-notifications-verification-server/releases/tag/v0.24.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Privilege escalation in rbac"
}


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  • 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.
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  • 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.



Detection rules are retrieved from Rulezet.