GHSA-W73W-5M7G-F7QC

Vulnerability from github – Published: 2021-05-18 21:08 – Updated: 2024-05-20 19:26
VLAI
Summary
Authorization bypass in github.com/dgrijalva/jwt-go
Details

jwt-go allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check. There is no patch available and users of jwt-go are advised to migrate to golang-jwt at version 3.2.1

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/dgrijalva/jwt-go"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-20150717181359-44718f8a89b0"
            },
            {
              "last_affected": "3.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/dgrijalva/jwt-go/v4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.0.0-preview1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-26160"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287",
      "CWE-755"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-05-18T20:54:59Z",
    "nvd_published_at": "2020-09-30T18:15:00Z",
    "severity": "HIGH"
  },
  "details": "jwt-go allows attackers to bypass intended access restrictions in situations with `[]string{}` for `m[\"aud\"]` (which is allowed by the specification). Because the type assertion fails, \"\" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check. There is no patch available and users of jwt-go are advised to migrate to [golang-jwt](https://github.com/golang-jwt/jwt) at version 3.2.1",
  "id": "GHSA-w73w-5m7g-f7qc",
  "modified": "2024-05-20T19:26:26Z",
  "published": "2021-05-18T21:08:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-26160"
    },
    {
      "type": "WEB",
      "url": "https://github.com/dgrijalva/jwt-go/issues/422"
    },
    {
      "type": "WEB",
      "url": "https://github.com/dgrijalva/jwt-go/issues/462"
    },
    {
      "type": "WEB",
      "url": "https://github.com/dgrijalva/jwt-go/pull/426"
    },
    {
      "type": "WEB",
      "url": "https://github.com/dgrijalva/jwt-go/commit/ec0a89a131e3e8567adcb21254a5cd20a70ea4ab"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/dgrijalva/jwt-go"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2020-0017"
    },
    {
      "type": "WEB",
      "url": "https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMDGRIJALVAJWTGO-596515"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Authorization bypass in github.com/dgrijalva/jwt-go"
}



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