cvelistv5 - CVE-2021-25748

CVE-2021-25748

Vulnerability from cvelistv5

Published

2023-05-24 00:00

Modified

2024-08-03 20:11

Severity ?

7.6 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

Summary

Ingress-nginx `path` sanitization can be bypassed with newline character

References

▼	URL	Tags
	jordan@liggitt.net	https://github.com/kubernetes/ingress-nginx/issues/8686	Issue Tracking, Mitigation, Vendor Advisory
	jordan@liggitt.net	https://groups.google.com/g/kubernetes-security-announce/c/avaRYa9c7I8	Mailing List, Mitigation, Vendor Advisory

Impacted products

▼	Vendor	Product
	Kubernetes	Kubernetes ingress-nginx

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T20:11:28.404Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://groups.google.com/g/kubernetes-security-announce/c/avaRYa9c7I8"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/kubernetes/ingress-nginx/issues/8686"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Kubernetes ingress-nginx",
          "vendor": "Kubernetes",
          "versions": [
            {
              "lessThan": "1.2.1",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Gafnit Amiga"
        }
      ],
      "datePublic": "2022-06-10T00:00:00",
      "descriptions": [
        {
          "lang": "en",
          "value": "A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use a newline character to bypass the sanitization of the `spec.rules[].http.paths[].path` field of an Ingress object (in the `networking.k8s.io` or `extensions` API group) to obtain the credentials of the ingress-nginx controller. In the default configuration, that credential has access to all secrets in the cluster."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20: Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-05-24T00:00:00",
        "orgId": "a6081bf6-c852-4425-ad4f-a67919267565",
        "shortName": "kubernetes"
      },
      "references": [
        {
          "url": "https://groups.google.com/g/kubernetes-security-announce/c/avaRYa9c7I8"
        },
        {
          "url": "https://github.com/kubernetes/ingress-nginx/issues/8686"
        }
      ],
      "source": {
        "defect": [
          "https://github.com/kubernetes/ingress-nginx/issues/8686"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Ingress-nginx `path` sanitization can be bypassed with newline character",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a6081bf6-c852-4425-ad4f-a67919267565",
    "assignerShortName": "kubernetes",
    "cveId": "CVE-2021-25748",
    "datePublished": "2023-05-24T00:00:00",
    "dateReserved": "2021-01-21T00:00:00",
    "dateUpdated": "2024-08-03T20:11:28.404Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-25748\",\"sourceIdentifier\":\"jordan@liggitt.net\",\"published\":\"2023-05-24T17:15:09.253\",\"lastModified\":\"2023-06-01T20:44:14.080\",\"vulnStatus\":\"Analyzed\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use a newline character to bypass the sanitization of the `spec.rules[].http.paths[].path` field of an Ingress object (in the `networking.k8s.io` or `extensions` API group) to obtain the credentials of the ingress-nginx controller. In the default configuration, that credential has access to all secrets in the cluster.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":2.8,\"impactScore\":3.6},{\"source\":\"jordan@liggitt.net\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"LOW\",\"baseScore\":7.6,\"baseSeverity\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":4.7}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]},{\"source\":\"jordan@liggitt.net\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-20\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:kubernetes:ingress-nginx:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.2.1\",\"matchCriteriaId\":\"E43BDC85-F198-4126-B487-21F6C3667561\"}]}]}],\"references\":[{\"url\":\"https://github.com/kubernetes/ingress-nginx/issues/8686\",\"source\":\"jordan@liggitt.net\",\"tags\":[\"Issue Tracking\",\"Mitigation\",\"Vendor Advisory\"]},{\"url\":\"https://groups.google.com/g/kubernetes-security-announce/c/avaRYa9c7I8\",\"source\":\"jordan@liggitt.net\",\"tags\":[\"Mailing List\",\"Mitigation\",\"Vendor Advisory\"]}]}}"
  }
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted

CVE-2021-25748

Vulnerability from cvelistv5

ghsa-863x-868h-968x

Vulnerability from github

gsd-2021-25748

Vulnerability from gsd

Tags

Sightings

Nomenclature