GHSA-856Q-XV3C-7F2F

Vulnerability from github – Published: 2022-02-23 14:59 – Updated: 2022-02-25 15:38
VLAI?
Summary
Unauthenticated control plane denial of service attack in Istio
Details

Impact

The Istio control plane, istiod, is vulnerable to a request processing error, allowing a malicious attacker that sends a specially crafted message which results in the control plane crashing. This endpoint is served over TLS port 15012, but does not require any authentication from the attacker.

For simple installations, Istiod is typically only reachable from within the cluster, limiting the blast radius. However, for some deployments, especially multicluster topologies, this port is exposed over the public internet.

Patches

  • Istio 1.13.1 and above
  • Istio 1.12.4 and above
  • Istio 1.11.7 and above

Workarounds

There are no effective workarounds, beyond upgrading. Limiting network access to Istiod to the minimal set of clients can help lessen the scope of the vulnerability to some extent.

References

More details can be found in the Istio Security Bulletin

For more information

If you have any questions or comments about this advisory, please email us at istio-security-vulnerability-reports@googlegroups.com

Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "istio.io/istio"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.13.0"
            },
            {
              "fixed": "1.13.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.13.0"
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "istio.io/istio"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.12.0"
            },
            {
              "fixed": "1.12.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "istio.io/istio"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.11.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-23635"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1284",
      "CWE-287"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-02-23T14:59:08Z",
    "nvd_published_at": "2022-02-22T22:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nThe Istio control plane, `istiod`, is vulnerable to a request processing error, allowing a malicious attacker that sends a specially crafted message which results in the control plane crashing. This endpoint is served over TLS port 15012, but does not require any authentication from the attacker.\n\nFor simple installations, Istiod is typically only reachable from within the cluster, limiting the blast radius. However, for some deployments, especially [multicluster](https://istio.io/latest/docs/setup/install/multicluster/primary-remote/) topologies, this port is exposed over the public internet.\n\n### Patches\n\n- Istio 1.13.1 and above\n- Istio 1.12.4 and above\n- Istio 1.11.7 and above\n\n### Workarounds\nThere are no effective workarounds, beyond upgrading. Limiting network access to Istiod to the minimal set of clients can help lessen the scope of the vulnerability to some extent.\n\n### References\nMore details can be found in the [Istio Security Bulletin](https://istio.io/latest/news/security/istio-security-2022-003)\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](mailto:istio-security-vulnerability-reports@googlegroups.com)\n",
  "id": "GHSA-856q-xv3c-7f2f",
  "modified": "2022-02-25T15:38:52Z",
  "published": "2022-02-23T14:59:08Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/istio/istio/security/advisories/GHSA-856q-xv3c-7f2f"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-23635"
    },
    {
      "type": "WEB",
      "url": "https://github.com/istio/istio/commit/5f3b5ed958ae75156f8656fe7b3794f78e94db84"
    },
    {
      "type": "WEB",
      "url": "https://github.com/istio/istio"
    },
    {
      "type": "WEB",
      "url": "https://istio.io/latest/news/security/istio-security-2022-003"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Unauthenticated control plane denial of service attack in Istio"
}


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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.
  • 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.



Detection rules are retrieved from Rulezet.