gsd-2023-6121
Vulnerability from gsd
Modified
2023-12-13 01:20
Details
An out-of-bounds read vulnerability was found in the NVMe-oF/TCP subsystem in the Linux kernel. This flaw allows a remote attacker to send a crafted TCP packet, triggering a heap-based buffer overflow that results in kmalloc data to be printed (and potentially leaked) to the kernel ring buffer (dmesg).
Aliases
Aliases
CVE-2023-6121


To clipboard 

{
  "GSD": {
    "alias": "CVE-2023-6121",
    "id": "GSD-2023-6121"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-6121"
      ],
      "details": "An out-of-bounds read vulnerability was found in the NVMe-oF/TCP subsystem in the Linux kernel. This flaw allows a remote attacker to send a crafted TCP packet, triggering a heap-based buffer overflow that results in kmalloc data to be printed (and potentially leaked) to the kernel ring buffer (dmesg).",
      "id": "GSD-2023-6121",
      "modified": "2023-12-13T01:20:32.946616Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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      "CVE_data_meta": {
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        "ID": "CVE-2023-6121",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Red Hat Enterprise Linux 6",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "not down converted",
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                            "defaultStatus": "unknown"
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                  {
                    "product_name": "Red Hat Enterprise Linux 7",
                    "version": {
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                  },
                  {
                    "product_name": "Red Hat Enterprise Linux 8",
                    "version": {
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                          "x_cve_json_5_version_data": {
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                    "product_name": "Red Hat Enterprise Linux 9",
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        }
      },
      "credits": [
        {
          "lang": "en",
          "value": "Red Hat would like to thank Alon Zahavi for reporting this issue."
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
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            "value": "An out-of-bounds read vulnerability was found in the NVMe-oF/TCP subsystem in the Linux kernel. This issue may allow a remote attacker to send a crafted TCP packet, triggering a heap-based buffer overflow that results in kmalloc data being printed and potentially leaked to the kernel ring buffer (dmesg)."
          }
        ]
      },
      "impact": {
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
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            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
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      "problemtype": {
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                "cweId": "CWE-125",
                "lang": "eng",
                "value": "Out-of-bounds Read"
              }
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        ]
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            "refsource": "MISC",
            "url": "https://access.redhat.com/security/cve/CVE-2023-6121"
          },
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            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2250043"
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            "refsource": "MISC",
            "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html"
          }
        ]
      },
      "work_around": [
        {
          "lang": "en",
          "value": "This flaw can be mitigated by explicitly setting the kernel parameter to restrict unprivileged users from using dmesg:\n```\nsudo sysctl -w kernel.dmesg_restrict=1\n```\nTo make it persistent between system reboots:\n```\necho \u0027kernel.dmesg_restrict=1\u0027 | sudo tee -a /etc/sysctl.conf\n```"
        }
      ]
    },
    "nvd.nist.gov": {
      "cve": {
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            "lang": "en",
            "value": "An out-of-bounds read vulnerability was found in the NVMe-oF/TCP subsystem in the Linux kernel. This issue may allow a remote attacker to send a crafted TCP packet, triggering a heap-based buffer overflow that results in kmalloc data being printed and potentially leaked to the kernel ring buffer (dmesg)."
          },
          {
            "lang": "es",
            "value": "Se encontr\u00f3 una vulnerabilidad de lectura fuera de los l\u00edmites en el subsistema NVMe-oF/TCP del kernel de Linux. Esta falla permite que un atacante remoto env\u00ede un paquete TCP manipulado, lo que desencadena un desbordamiento del b\u00fafer que da como resultado que los datos kmalloc se impriman (y potencialmente se filtren) en el b\u00fafer de anillo del kernel (dmesg)."
          }
        ],
        "id": "CVE-2023-6121",
        "lastModified": "2024-01-11T21:15:11.517",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
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                "confidentialityImpact": "LOW",
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                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
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              "impactScore": 1.4,
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              "type": "Secondary"
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        "published": "2023-11-16T15:15:11.197",
        "references": [
          {
            "source": "secalert@redhat.com",
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        "vulnStatus": "Modified",
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    }
  }
}


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