rhsa-2025:3053
Vulnerability from csaf_redhat
Published
2025-03-20 04:55
Modified
2025-11-12 02:30
Summary
Red Hat Security Advisory: Gatekeeper v3.15.4

Notes

Topic
Gatekeeper v3.15.4
Details
Gatekeeper v3.15.4 Gatekeeper is a validating webhook with auditing capabilities that can enforce custom resource definition-based policies that are run with the Open Policy Agent (OPA). Gatekeeper is supported through a Red Hat Advanced Cluster Management for Kubernetes subscription. Starting in v3.15, the following namespaces are exempt from admission control: - kube-* - multicluster-engine - hypershift - hive - rhacs-operator - open-cluster-* - openshift-* To disable the default exempt namespaces, set the namespaces you want on the object. Security fix(es): * golang.org/x/oauth2: Unexpected memory consumption during token parsing in golang.org/x/oauth2 (CVE-2025-22868) * golang.org/x/crypto/ssh: Denial of Service in the Key Exchange of golang.org/x/crypto/ssh (CVE-2025-22869) Additional Release Notes: * v3.15.0 https://github.com/open-policy-agent/gatekeeper/releases/tag/v3.15.0 * v3.15.1 https://github.com/open-policy-agent/gatekeeper/releases/tag/v3.15.1
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.


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      "text": "Important"
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        "category": "summary",
        "text": "Gatekeeper v3.15.4",
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        "category": "general",
        "text": "Gatekeeper v3.15.4\n\nGatekeeper is a validating webhook with auditing capabilities that can\nenforce custom resource definition-based policies that are run with the\nOpen Policy Agent (OPA). Gatekeeper is supported through a Red Hat Advanced\nCluster Management for Kubernetes subscription.\n\nStarting in v3.15, the following namespaces are exempt from admission control:\n\n- kube-*\n- multicluster-engine\n- hypershift\n- hive\n- rhacs-operator\n- open-cluster-*\n- openshift-*\n\nTo disable the default exempt namespaces, set the namespaces you want on the\nobject.\n\nSecurity fix(es):\n\n* golang.org/x/oauth2: Unexpected memory consumption during token parsing in golang.org/x/oauth2 (CVE-2025-22868)\n* golang.org/x/crypto/ssh: Denial of Service in the Key Exchange of golang.org/x/crypto/ssh (CVE-2025-22869)\n\nAdditional Release Notes:\n\n* v3.15.0 https://github.com/open-policy-agent/gatekeeper/releases/tag/v3.15.0\n* v3.15.1 https://github.com/open-policy-agent/gatekeeper/releases/tag/v3.15.1",
        "title": "Details"
      },
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        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
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        "product_reference": "gatekeeper/gatekeeper-rhel9@sha256:c0130d50528c55aa6819f7b722ad39bb583f1b8b961c47e32a8561d34440883c_ppc64le",
        "relates_to_product_reference": "9Base-gatekeeper-3.15"
      }
    ]
  },
  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "jub0bs"
          ]
        }
      ],
      "cve": "CVE-2025-22868",
      "cwe": {
        "id": "CWE-1286",
        "name": "Improper Validation of Syntactic Correctness of Input"
      },
      "discovery_date": "2025-02-26T04:00:44.350024+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2348366"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the `golang.org/x/oauth2/jws` package in the token parsing component. This vulnerability is made possible because of the use of `strings.Split(token, \".\")` to split JWT tokens, which can lead to excessive memory consumption when processing maliciously crafted tokens with a large number of `.` characters. An attacker could exploit this functionality by sending numerous malformed tokens and can trigger memory exhaustion and a Denial of Service.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang.org/x/oauth2/jws: Unexpected memory consumption during token parsing in golang.org/x/oauth2/jws",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-22868"
        },
        {
          "category": "external",
          "summary": "RHBZ#2348366",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348366"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-22868",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-22868"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-22868",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22868"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/652155",
          "url": "https://go.dev/cl/652155"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/71490",
          "url": "https://go.dev/issue/71490"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2025-3488",
          "url": "https://pkg.go.dev/vuln/GO-2025-3488"
        }
      ],
      "release_date": "2025-02-26T03:07:49.012000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2025-03-20T04:55:47+00:00",
          "details": "For more information, see the following resources:\n\n* See the Gatekeeper\ndocumentation: https://open-policy-agent.github.io/gatekeeper/website/docs/.\n\n* For support and troubleshooting, Gatekeeper is supported through a Red Hat Advanced Cluster Management for\nKubernetes subscription:\nhttps://access.redhat.com/products/red-hat-advanced-cluster-management-for-kubernetes.\n\n* The Open Policy Agent Gatekeeper community collaborates on Slack. Join the \n#opa-gatekeeper channel: https://openpolicyagent.slack.com/archives/CDTN970AX.\n\n* Open issues on the Gatekeeper GitHub repository: https://github.com/open-policy-agent/gatekeeper/issues.\n\n* See the installation and upgrade documentation: https://open-policy-agent.github.io/gatekeeper/website/docs/install.",
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            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:d4cb7893bc7ddf352e9ee37f97461c798002cc79e1eea8706944f94f6b07a460_s390x",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:e8e33ff4369c91bbf63c4c81979e0231ff247f3b0ab7a2872c0918a5455a1a2d_amd64",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:f287794acade33527da37fa3d6d872753231ac40546bdadf577ea4c3eb3a9347_arm64",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:f59983c70575e23e7e0e04422a0db15f99d8943c9246878044b205e871934635_ppc64le",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:2861cb1f2dec29a50a1b920768f8c7d463c7917b4267cb62813f7378972ecd63_amd64",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:9530577a1ddbc3fd1cc27fa9bf25220a4437f20817d85974a3066fd3d4229d94_arm64",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:b893c6fd9d1414efd34c51fdc08795c9ddf5e73053c5cc1b742eea04c6a1d4bf_s390x",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:c0130d50528c55aa6819f7b722ad39bb583f1b8b961c47e32a8561d34440883c_ppc64le"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2025:3053"
        },
        {
          "category": "workaround",
          "details": "To mitigate this vulnerability, it is recommended to pre-validate any payloads passed to `go-jose` to check that they do not contain an excessive amount of `.` characters.",
          "product_ids": [
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            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:d4cb7893bc7ddf352e9ee37f97461c798002cc79e1eea8706944f94f6b07a460_s390x",
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            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:f287794acade33527da37fa3d6d872753231ac40546bdadf577ea4c3eb3a9347_arm64",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:f59983c70575e23e7e0e04422a0db15f99d8943c9246878044b205e871934635_ppc64le",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:2861cb1f2dec29a50a1b920768f8c7d463c7917b4267cb62813f7378972ecd63_amd64",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:9530577a1ddbc3fd1cc27fa9bf25220a4437f20817d85974a3066fd3d4229d94_arm64",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:b893c6fd9d1414efd34c51fdc08795c9ddf5e73053c5cc1b742eea04c6a1d4bf_s390x",
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
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            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:d4cb7893bc7ddf352e9ee37f97461c798002cc79e1eea8706944f94f6b07a460_s390x",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:e8e33ff4369c91bbf63c4c81979e0231ff247f3b0ab7a2872c0918a5455a1a2d_amd64",
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            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:f59983c70575e23e7e0e04422a0db15f99d8943c9246878044b205e871934635_ppc64le",
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            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:9530577a1ddbc3fd1cc27fa9bf25220a4437f20817d85974a3066fd3d4229d94_arm64",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:b893c6fd9d1414efd34c51fdc08795c9ddf5e73053c5cc1b742eea04c6a1d4bf_s390x",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:c0130d50528c55aa6819f7b722ad39bb583f1b8b961c47e32a8561d34440883c_ppc64le"
          ]
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "golang.org/x/oauth2/jws: Unexpected memory consumption during token parsing in golang.org/x/oauth2/jws"
    },
    {
      "cve": "CVE-2025-22869",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "discovery_date": "2025-02-26T04:00:47.683125+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2348367"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the golang.org/x/crypto/ssh package. SSH clients and servers are vulnerable to increased resource consumption, possibly leading to memory exhaustion and a DoS. This can occur during key exchange when the other party is slow to respond during key exchange.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang.org/x/crypto/ssh: Denial of Service in the Key Exchange of golang.org/x/crypto/ssh",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "While this flaw affects both SSH clients and servers implemented with golang.org/x/crypto/ssh, realistically the flaw will only lead to a DoS when transferring large files, greatly reducing the likelihood of exploitation.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-22869"
        },
        {
          "category": "external",
          "summary": "RHBZ#2348367",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348367"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-22869",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-22869"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-22869",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22869"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/652135",
          "url": "https://go.dev/cl/652135"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/71931",
          "url": "https://go.dev/issue/71931"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2025-3487",
          "url": "https://pkg.go.dev/vuln/GO-2025-3487"
        }
      ],
      "release_date": "2025-02-26T03:07:48.855000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2025-03-20T04:55:47+00:00",
          "details": "For more information, see the following resources:\n\n* See the Gatekeeper\ndocumentation: https://open-policy-agent.github.io/gatekeeper/website/docs/.\n\n* For support and troubleshooting, Gatekeeper is supported through a Red Hat Advanced Cluster Management for\nKubernetes subscription:\nhttps://access.redhat.com/products/red-hat-advanced-cluster-management-for-kubernetes.\n\n* The Open Policy Agent Gatekeeper community collaborates on Slack. Join the \n#opa-gatekeeper channel: https://openpolicyagent.slack.com/archives/CDTN970AX.\n\n* Open issues on the Gatekeeper GitHub repository: https://github.com/open-policy-agent/gatekeeper/issues.\n\n* See the installation and upgrade documentation: https://open-policy-agent.github.io/gatekeeper/website/docs/install.",
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            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:d4cb7893bc7ddf352e9ee37f97461c798002cc79e1eea8706944f94f6b07a460_s390x",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:e8e33ff4369c91bbf63c4c81979e0231ff247f3b0ab7a2872c0918a5455a1a2d_amd64",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:f287794acade33527da37fa3d6d872753231ac40546bdadf577ea4c3eb3a9347_arm64",
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            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:9530577a1ddbc3fd1cc27fa9bf25220a4437f20817d85974a3066fd3d4229d94_arm64",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:b893c6fd9d1414efd34c51fdc08795c9ddf5e73053c5cc1b742eea04c6a1d4bf_s390x",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:c0130d50528c55aa6819f7b722ad39bb583f1b8b961c47e32a8561d34440883c_ppc64le"
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          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2025:3053"
        },
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          "category": "workaround",
          "details": "This flaw can be mitigated when using the client only connecting to trusted servers.",
          "product_ids": [
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            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:9530577a1ddbc3fd1cc27fa9bf25220a4437f20817d85974a3066fd3d4229d94_arm64",
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
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            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:d4cb7893bc7ddf352e9ee37f97461c798002cc79e1eea8706944f94f6b07a460_s390x",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:e8e33ff4369c91bbf63c4c81979e0231ff247f3b0ab7a2872c0918a5455a1a2d_amd64",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:f287794acade33527da37fa3d6d872753231ac40546bdadf577ea4c3eb3a9347_arm64",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9-operator@sha256:f59983c70575e23e7e0e04422a0db15f99d8943c9246878044b205e871934635_ppc64le",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:2861cb1f2dec29a50a1b920768f8c7d463c7917b4267cb62813f7378972ecd63_amd64",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:9530577a1ddbc3fd1cc27fa9bf25220a4437f20817d85974a3066fd3d4229d94_arm64",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:b893c6fd9d1414efd34c51fdc08795c9ddf5e73053c5cc1b742eea04c6a1d4bf_s390x",
            "9Base-gatekeeper-3.15:gatekeeper/gatekeeper-rhel9@sha256:c0130d50528c55aa6819f7b722ad39bb583f1b8b961c47e32a8561d34440883c_ppc64le"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "golang.org/x/crypto/ssh: Denial of Service in the Key Exchange of golang.org/x/crypto/ssh"
    }
  ]
}


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