{
  "schema_version": "1.4.0",
  "id": "GHSA-hqxw-mm44-gc4r",
  "modified": "2022-08-15T20:04:30Z",
  "published": "2021-08-30T16:16:14Z",
  "aliases": [
    "CVE-2021-39156"
  ],
  "summary": "Istio Fragments in Path May Lead to Authorization Policy Bypass",
  "details": "### Impact\nIstio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio’s URI path based authorization policies. \n\n### Patches\n* Istio 1.11.1 and above\n* Istio 1.10.4 and above\n* Istio 1.9.8 and above\n\n### Workarounds\nA Lua filter may be written to normalize the path.  This is similar to the Path normalization presented in the [Security Best Practices](https://istio.io/latest/docs/ops/best-practices/security/#case-normalization) guide.\n\n### References\nMore details can be found in the [Istio Security Bulletin](https://istio.io/latest/news/security/istio-security-2021-008)\n\n### For more information\nIf you have any questions or comments about this advisory, please email us at istio-security-vulnerability-reports@googlegroups.com\n",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "istio.io/istio"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.9.8"
            }
          ]
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "istio.io/istio"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "1.10.0"
            },
            {
              "fixed": "1.10.4"
            }
          ]
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "istio.io/istio"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "1.11.0"
            },
            {
              "fixed": "1.11.1"
            }
          ]
        }
      ],
      "versions": [
        "1.11.0"
      ]
    }
  ],
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4r"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-39156"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/istio/istio"
    },
    {
      "type": "WEB",
      "url": "https://istio.io/latest/news/security/istio-security-2021-008"
    }
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-706",
      "CWE-863"
    ],
    "severity": "HIGH",
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-25T22:28:17Z",
    "nvd_published_at": "2021-08-24T23:15:00Z"
  }
}