Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2024-05-15 12:07

Modified

2026-09-08 08:34

Summary

Potential HTTP policy bypass when using header rules in Cilium

Details

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. This issue only impacts users who have a HTTP policy that applies to multiple toEndpoints AND have an allow-all rule in place that affects only one of those endpoints. In such cases, a wildcard rule will be appended to the set of HTTP rules, which could cause bypass of HTTP policies. This issue has been patched in Cilium 1.11.16, 1.12.9, and 1.13.2.

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "cilium",
        "purl": "pkg:bitnami/cilium"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.11.16"
            },
            {
              "introduced": "1.12.0"
            },
            {
              "fixed": "1.12.9"
            },
            {
              "introduced": "1.13.0"
            },
            {
              "fixed": "1.13.2"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-30851"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*"
    ],
    "severity": "Medium"
  },
  "details": "Cilium is a networking, observability, and security solution with an eBPF-based dataplane. This issue only impacts users who have a HTTP policy that applies to multiple `toEndpoints` AND have an allow-all rule in place that affects only one of those endpoints. In such cases, a wildcard rule will be appended to the set of HTTP rules, which could cause bypass of HTTP policies. This issue has been patched in Cilium 1.11.16, 1.12.9, and 1.13.2.",
  "id": "BIT-cilium-2023-30851",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2024-05-15T12:07:32.074Z",
  "references": [
    {
      "type": "ARTICLE",
      "url": "https://github.com/cilium/cilium/releases/tag/v1.11.16"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/cilium/cilium/releases/tag/v1.12.9"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/cilium/cilium/releases/tag/v1.13.2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/cilium/cilium/security/advisories/GHSA-2h44-x2wx-49f4"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-30851"
    }
  ],
  "schema_version": "1.5.0",
  "summary": "Potential HTTP policy bypass when using header rules in Cilium"
}

CVE-2023-30851 (GCVE-0-2023-30851)

Vulnerability from cvelistv5 – Published: 2023-05-25 17:47 – Updated: 2025-01-16 19:15

Title

Potential HTTP policy bypass when using header rules in Cilium

Summary

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. This issue only impacts users who have a HTTP policy that applies to multiple `toEndpoints` AND have an allow-all rule in place that affects only one of those endpoints. In such cases, a wildcard rule will be appended to the set of HTTP rules, which could cause bypass of HTTP policies. This issue has been patched in Cilium 1.11.16, 1.12.9, and 1.13.2.

Severity

2.6 (Low)


                        
                          CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-01-16 19:15 UTC

CWE

CWE-693 - Protection Mechanism Failure

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/cilium/cilium/security/advisor…	x_refsource_CONFIRM
https://github.com/cilium/cilium/releases/tag/v1.11.16	x_refsource_MISC
https://github.com/cilium/cilium/releases/tag/v1.12.9	x_refsource_MISC
https://github.com/cilium/cilium/releases/tag/v1.13.2	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
cilium	cilium	Affected: < 1.11.16 Affected: >= 1.12.0, < 1.12.9 Affected: >= 1.13.0, < 1.13.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T14:37:15.467Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "https://github.com/cilium/cilium/security/advisories/GHSA-2h44-x2wx-49f4",
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/cilium/cilium/security/advisories/GHSA-2h44-x2wx-49f4"
          },
          {
            "name": "https://github.com/cilium/cilium/releases/tag/v1.11.16",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/cilium/cilium/releases/tag/v1.11.16"
          },
          {
            "name": "https://github.com/cilium/cilium/releases/tag/v1.12.9",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/cilium/cilium/releases/tag/v1.12.9"
          },
          {
            "name": "https://github.com/cilium/cilium/releases/tag/v1.13.2",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/cilium/cilium/releases/tag/v1.13.2"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2023-30851",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-01-16T19:15:03.306440Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-01-16T19:15:24.959Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "cilium",
          "vendor": "cilium",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.11.16"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.12.0, \u003c 1.12.9"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.13.0, \u003c 1.13.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Cilium is a networking, observability, and security solution with an eBPF-based dataplane. This issue only impacts users who have a HTTP policy that applies to multiple `toEndpoints` AND have an allow-all rule in place that affects only one of those endpoints. In such cases, a wildcard rule will be appended to the set of HTTP rules, which could cause bypass of HTTP policies. This issue has been patched in Cilium 1.11.16, 1.12.9, and 1.13.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 2.6,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-693",
              "description": "CWE-693: Protection Mechanism Failure",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-05-25T17:47:51.095Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/cilium/cilium/security/advisories/GHSA-2h44-x2wx-49f4",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/cilium/cilium/security/advisories/GHSA-2h44-x2wx-49f4"
        },
        {
          "name": "https://github.com/cilium/cilium/releases/tag/v1.11.16",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/cilium/cilium/releases/tag/v1.11.16"
        },
        {
          "name": "https://github.com/cilium/cilium/releases/tag/v1.12.9",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/cilium/cilium/releases/tag/v1.12.9"
        },
        {
          "name": "https://github.com/cilium/cilium/releases/tag/v1.13.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/cilium/cilium/releases/tag/v1.13.2"
        }
      ],
      "source": {
        "advisory": "GHSA-2h44-x2wx-49f4",
        "discovery": "UNKNOWN"
      },
      "title": "Potential HTTP policy bypass when using header rules in Cilium"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2023-30851",
    "datePublished": "2023-05-25T17:47:51.095Z",
    "dateReserved": "2023-04-18T16:13:15.881Z",
    "dateUpdated": "2025-01-16T19:15:24.959Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.