CVE-2023-22651

Vulnerability from cvelistv5

Published

2023-05-04 07:53

Modified

2024-08-02 10:13

Severity ?

9.9 (Critical) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Summary

Improper Privilege Management vulnerability in SUSE Rancher allows Privilege Escalation. A failure in the update logic of Rancher's admission Webhook may lead to the misconfiguration of the Webhook. This component enforces validation rules and security checks before resources are admitted into the Kubernetes cluster. The issue only affects users that upgrade from 2.6.x or 2.7.x to 2.7.2. Users that did a fresh install of 2.7.2 (and did not follow an upgrade path) are not affected.

References

▼	URL	Tags
	meissner@suse.de	https://bugzilla.suse.com/show_bug.cgi?id=CVE-2023-22651	Issue Tracking, Vendor Advisory
	meissner@suse.de	https://github.com/rancher/rancher/security/advisories/GHSA-6m9f-pj6w-w87g	Mitigation, Third Party Advisory

Impacted products

▼	Vendor	Product
	SUSE	Rancher

Show details on NVD website

JSON

To clipboard

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ghsa-6m9f-pj6w-w87g

Vulnerability from github

Published

2023-04-24 22:34

Modified

2023-04-25 18:09

Severity ?

9.9 (Critical) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Summary

Rancher Webhook is misconfigured during upgrade process

Details

Impact

A failure in the update logic of Rancher's admission Webhook may lead to the misconfiguration of the Webhook. This component enforces validation rules and security checks before resources are admitted into the Kubernetes cluster.

When the Webhook is operating in a degraded state, it no longer validates any resources, which may result in severe privilege escalations and data corruption.

The issue only affects users that upgrade from 2.6.x or 2.7.x to 2.7.2. Users that did a fresh install of 2.7.2 (and did not follow an upgrade path) are not affected.

The command below can be executed on the local cluster to determine whether the cluster is affected by this issue:

```sh $ kubectl get validatingwebhookconfigurations.admissionregistration.k8s.io rancher.cattle.io

NAME WEBHOOKS AGE rancher.cattle.io 0 19h ```

If the resulting webhook quantity is 0, the Rancher instance is affected.

Patches

Patched versions include release 2.7.3 and later versions.

Workarounds

If you are affected and cannot update to a patched Rancher version, the recommended workaround is to manually reconfigure the Webhook with the script below. Please note that the script must be run from inside the local cluster or with a kubeconfig pointing to the local cluster which has admin permissions.

```yaml

!/bin/bash

set -euo pipefail

function prereqs() { if ! [ -x "$(command -v kubectl)" ]; then echo "error: kubectl is not installed." >&2 exit 1 fi

if [[ -z "$(kubectl config view -o jsonpath='{.clusters[].cluster.server}')" ]]; then
    echo "error: No kubernetes cluster found on kubeconfig." >&2
    exit 1
fi

}

function restart_deployment(){ kubectl rollout restart deployment rancher-webhook -n cattle-system kubectl rollout status deployment rancher-webhook -n cattle-system --timeout=30s }

function workaround() { echo "Cluster: $(kubectl config view -o jsonpath='{.clusters[].cluster.server}')"

if ! kubectl get validatingwebhookconfigurations.admissionregistration.k8s.io rancher.cattle.io > /dev/null 2>&1; then
    echo "webhook rancher.cattle.io not found, restarting deployment:"
    restart_deployment

    echo "waiting for webhook configuration"
    sleep 15s
fi

local -i webhooks
webhooks="$(kubectl get validatingwebhookconfigurations.admissionregistration.k8s.io rancher.cattle.io --no-headers | awk '{ print $2 }')"

if [ "${webhooks}" == "0" ]; then
    echo "Webhook misconfiguration status: Cluster is affected by CVE-2023-22651"

    echo "Running workaround:"
    kubectl delete validatingwebhookconfiguration rancher.cattle.io
    restart_deployment

    ret=$?
    if [ $ret -eq 0 ]; then
        echo "Webhook restored, CVE-2023-22651 is fixed"
    else
        echo "error trying to restart deployment. try again in a few seconds."
    fi
else
    echo "Webhook misconfiguration status: not present (skipping)"
fi

echo "Done"

}

function main() { prereqs workaround }

main ```

References

https://github.com/rancher/webhook/pull/216/commits/a4a498613b43a3ee93c5ab06742a3bc8adace45d

For more information

If you have any questions or comments about this advisory:

Reach out to the SUSE Rancher Security team for security related inquiries.
Open an issue in the Rancher repository.
Verify our support matrix and product support lifecycle.

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/rancher/rancher"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.7.2"
            },
            {
              "fixed": "2.7.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.7.2"
      ]
    }
  ],
  "aliases": [
    "CVE-2023-22651"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": true,
    "github_reviewed_at": "2023-04-24T22:34:59Z",
    "nvd_published_at": "2023-05-04T08:15:22Z",
    "severity": "CRITICAL"
  },
  "details": "### Impact\n\nA failure in the update logic of Rancher\u0027s admission Webhook may lead to the misconfiguration of the Webhook. This component enforces validation rules and security checks before resources are admitted into the Kubernetes cluster.\n\nWhen the Webhook is operating in a degraded state, it no longer validates any resources, which may result in severe privilege escalations and data corruption.\n\nThe issue only affects users that upgrade from `2.6.x` or `2.7.x` to `2.7.2`. Users that did a fresh install of 2.7.2 (and did not follow an upgrade path) are not affected.\n\nThe command below can be executed on the `local` cluster to determine whether the cluster is affected by this issue:\n\n```sh\n$ kubectl get validatingwebhookconfigurations.admissionregistration.k8s.io rancher.cattle.io\n\nNAME                WEBHOOKS   AGE\nrancher.cattle.io   0         19h\n```\n\nIf the resulting webhook quantity is `0`, the Rancher instance is affected.\n\n### Patches\n\nPatched versions include release `2.7.3` and later versions.\n\n### Workarounds\n\nIf you are affected and cannot update to a patched Rancher version, the recommended workaround is to manually reconfigure the Webhook with the script below. Please note that the script must be run from inside the `local` cluster or with a kubeconfig pointing to the `local` cluster which has admin permissions.\n\n```yaml\n#!/bin/bash\n\nset -euo pipefail\n\nfunction prereqs() {\n    if ! [ -x \"$(command -v kubectl)\" ]; then\n      echo \"error: kubectl is not installed.\" \u003e\u00262\n      exit 1\n    fi\n\n    if [[ -z \"$(kubectl config view -o jsonpath=\u0027{.clusters[].cluster.server}\u0027)\" ]]; then\n        echo \"error: No kubernetes cluster found on kubeconfig.\" \u003e\u00262\n        exit 1\n    fi\n}\n\nfunction restart_deployment(){\n    kubectl rollout restart deployment rancher-webhook -n cattle-system\n    kubectl rollout status deployment rancher-webhook -n cattle-system --timeout=30s\n}\n\nfunction workaround() {\n    echo \"Cluster: $(kubectl config view -o jsonpath=\u0027{.clusters[].cluster.server}\u0027)\"\n\n    if ! kubectl get validatingwebhookconfigurations.admissionregistration.k8s.io rancher.cattle.io \u003e /dev/null 2\u003e\u00261; then\n        echo \"webhook rancher.cattle.io not found, restarting deployment:\"\n        restart_deployment\n\n        echo \"waiting for webhook configuration\"\n        sleep 15s\n    fi\n\n    local -i webhooks\n    webhooks=\"$(kubectl get validatingwebhookconfigurations.admissionregistration.k8s.io rancher.cattle.io --no-headers | awk \u0027{ print $2 }\u0027)\"\n\n    if [ \"${webhooks}\" == \"0\" ]; then\n        echo \"Webhook misconfiguration status: Cluster is affected by CVE-2023-22651\"\n        \n        echo \"Running workaround:\"\n        kubectl delete validatingwebhookconfiguration rancher.cattle.io\n        restart_deployment\n\n        ret=$?\n        if [ $ret -eq 0 ]; then\n            echo \"Webhook restored, CVE-2023-22651 is fixed\"\n        else\n            echo \"error trying to restart deployment. try again in a few seconds.\"\n        fi\n    else\n        echo \"Webhook misconfiguration status: not present (skipping)\"\n    fi\n\n    echo \"Done\"\n}\n\nfunction main() {\n    prereqs\n    workaround\n}\n\nmain\n```\n\n### References\n- https://github.com/rancher/webhook/pull/216/commits/a4a498613b43a3ee93c5ab06742a3bc8adace45d\n\n### For more information\nIf you have any questions or comments about this advisory:\n\n- Reach out to the [SUSE Rancher Security team](https://github.com/rancher/rancher/security/policy) for security related inquiries.\n- Open an issue in the [Rancher](https://github.com/rancher/rancher/issues/new/choose) repository.\n- Verify our [support matrix](https://www.suse.com/suse-rancher/support-matrix/all-supported-versions/) and [product support lifecycle](https://www.suse.com/lifecycle/).",
  "id": "GHSA-6m9f-pj6w-w87g",
  "modified": "2023-04-25T18:09:03Z",
  "published": "2023-04-24T22:34:59Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/rancher/rancher/security/advisories/GHSA-6m9f-pj6w-w87g"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/rancher/rancher"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rancher/rancher/releases/tag/v2.7.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Rancher Webhook is misconfigured during upgrade process"
}

gsd-2023-22651

Vulnerability from gsd

Modified

2023-12-13 01:20

Details

Aliases

CVE-2023-22651

Aliases

CVE-2023-22651

JSON

To clipboard

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      "modified": "2023-12-13T01:20:42.982283Z",
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        "reference_data": [
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    },
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          "affected_versions": "All versions starting from 2.6.0 before 2.7.3",
          "cwe_ids": [
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            "CWE-78",
            "CWE-937"
          ],
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          "description": "Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027) in github.com/rancher/rancher.",
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          "solution": "Upgrade to version 2.7.3 or above.",
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          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:suse:rancher:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndIncluding": "2.7.2",
                "versionStartIncluding": "2.6.0",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "security@suse.com",
          "ID": "CVE-2023-22651"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "Improper Privilege Management vulnerability in SUSE Rancher allows Privilege Escalation. A failure in the update logic of Rancher\u0027s admission Webhook may lead to\n the misconfiguration of the Webhook. This component enforces validation\n rules and security checks before resources are admitted into the \nKubernetes cluster.\nThe issue only affects users that upgrade from 2.6.x or 2.7.x to 2.7.2. Users that did a fresh install of 2.7.2 (and did not follow an upgrade path) are not affected.\n\n"
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-269"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2023-22651",
              "refsource": "MISC",
              "tags": [
                "Issue Tracking",
                "Vendor Advisory"
              ],
              "url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2023-22651"
            },
            {
              "name": "https://github.com/rancher/rancher/security/advisories/GHSA-6m9f-pj6w-w87g",
              "refsource": "MISC",
              "tags": [
                "Mitigation",
                "Third Party Advisory"
              ],
              "url": "https://github.com/rancher/rancher/security/advisories/GHSA-6m9f-pj6w-w87g"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.9,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.1,
          "impactScore": 6.0
        }
      },
      "lastModifiedDate": "2023-05-10T18:08Z",
      "publishedDate": "2023-05-04T08:15Z"
    }
  }
}

wid-sec-w-2023-1069

Vulnerability from csaf_certbund

Published

2023-04-24 22:00

Modified

2023-04-24 22:00

Summary

Rancher: Schwachstelle ermöglicht Privilegieneskalation

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung

Rancher ist ein Werkzeug für die Verwaltung von Kubernetes-Container basierten Umgebungen.

Angriff

Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Rancher ausnutzen, um seine Privilegien zu erhöhen.

Betroffene Betriebssysteme

- UNIX - Linux

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "hoch"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Rancher ist ein Werkzeug f\u00fcr die Verwaltung von Kubernetes-Container basierten Umgebungen.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Rancher ausnutzen, um seine Privilegien zu erh\u00f6hen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- UNIX\n- Linux",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2023-1069 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2023/wid-sec-w-2023-1069.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2023-1069 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-1069"
      },
      {
        "category": "external",
        "summary": "GitHub Advisory Database vom 2023-04-24",
        "url": "https://github.com/rancher/rancher/security/advisories/GHSA-6m9f-pj6w-w87g"
      }
    ],
    "source_lang": "en-US",
    "title": "Rancher: Schwachstelle erm\u00f6glicht Privilegieneskalation",
    "tracking": {
      "current_release_date": "2023-04-24T22:00:00.000+00:00",
      "generator": {
        "date": "2024-02-15T17:25:40.554+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.0"
        }
      },
      "id": "WID-SEC-W-2023-1069",
      "initial_release_date": "2023-04-24T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2023-04-24T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Rancher Rancher 2.7.3",
            "product": {
              "name": "Rancher Rancher 2.7.3",
              "product_id": "T027498",
              "product_identification_helper": {
                "cpe": "cpe:/a:rancher:rancher:2.7.3"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Rancher"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-22651",
      "notes": [
        {
          "category": "description",
          "text": "Es existiert eine Schwachstelle in Rancher. Ein Fehler in der Aktualisierungslogik des Zulassungs-Webhooks kann zu einer Fehlkonfiguration f\u00fchren. Diese Komponente erzwingt Validierungsregeln und Sicherheitspr\u00fcfungen, bevor Ressourcen in den Kubernetes-Cluster aufgenommen werden. Wenn der Webhook in einem gest\u00f6rten Zustand arbeitet, kann er keine Ressourcen mehr validieren. Ein authentisierter Angreifer kann diese Schwachstelle ausnutzen, um seine Rechte zu erweitern."
        }
      ],
      "product_status": {
        "known_affected": [
          "T027498"
        ]
      },
      "release_date": "2023-04-24T22:00:00Z",
      "title": "CVE-2023-22651"
    }
  ]
}

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-2023-22651

Vulnerability from cvelistv5

ghsa-6m9f-pj6w-w87g

Vulnerability from github

Impact

Patches

Workarounds

!/bin/bash

References

For more information

gsd-2023-22651

Vulnerability from gsd

wid-sec-w-2023-1069

Vulnerability from csaf_certbund

Tags

Sightings

Nomenclature