GSD-2021-20319

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
An improper signature verification vulnerability was found in coreos-installer. A specially crafted gzip installation image can bypass the image signature verification and as a consequence can lead to the installation of unsigned content. An attacker able to modify the original installation image can write arbitrary data, and achieve full access to the node being installed.
Aliases
Aliases
CVE-2021-20319
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{
  "GSD": {
    "alias": "CVE-2021-20319",
    "description": "An improper signature verification vulnerability was found in coreos-installer. A specially crafted gzip installation image can bypass the image signature verification and as a consequence can lead to the installation of unsigned content. An attacker able to modify the original installation image can write arbitrary data, and achieve full access to the node being installed.",
    "id": "GSD-2021-20319",
    "references": [
      "https://access.redhat.com/errata/RHSA-2021:4008",
      "https://access.redhat.com/errata/RHSA-2021:3934",
      "https://access.redhat.com/errata/RHSA-2021:3930",
      "https://access.redhat.com/errata/RHSA-2021:3926"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-20319"
      ],
      "details": "An improper signature verification vulnerability was found in coreos-installer. A specially crafted gzip installation image can bypass the image signature verification and as a consequence can lead to the installation of unsigned content. An attacker able to modify the original installation image can write arbitrary data, and achieve full access to the node being installed.",
      "id": "GSD-2021-20319",
      "modified": "2023-12-13T01:23:12.719522Z",
      "schema_version": "1.4.0"
    }
  },
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        "ID": "CVE-2021-20319",
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      },
      "affects": {
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          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "coreos-installer",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "Affects coreos-installer before v0.10.1, Fixed in v0.10.1."
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "n/a"
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          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-347 - Improper Verification of Cryptographic Signature"
              }
            ]
          }
        ]
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          {
            "name": "https://bugzilla.redhat.com/show_bug.cgi?id=2011862",
            "refsource": "MISC",
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2011862"
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            "name": "https://github.com/coreos/coreos-installer/security/advisories/GHSA-3r3g-g73x-g593",
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            "refsource": "MISC",
            "url": "https://github.com/coreos/coreos-installer/pull/659/commits/ad243c6f0eff2835b2da56ca5f7f33af76253c89"
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    },
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        "nodes": [
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                "cpe23Uri": "cpe:2.3:a:redhat:coreos-installer:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "0.10.1",
                "vulnerable": true
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          "ID": "CVE-2021-20319"
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        "description": {
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              "value": "An improper signature verification vulnerability was found in coreos-installer. A specially crafted gzip installation image can bypass the image signature verification and as a consequence can lead to the installation of unsigned content. An attacker able to modify the original installation image can write arbitrary data, and achieve full access to the node being installed."
            }
          ]
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              "url": "https://github.com/coreos/coreos-installer/security/advisories/GHSA-3r3g-g73x-g593"
            },
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              "tags": [
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 6.8,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 8.6,
          "impactScore": 6.4,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": true
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 1.8,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2022-03-11T15:37Z",
      "publishedDate": "2022-03-04T18:15Z"
    }
  }
}


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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.
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  • 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.



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