gsd-2023-4206
Vulnerability from gsd
Modified
2023-12-13 01:20
Details
A use-after-free vulnerability in the Linux kernel's net/sched: cls_route component can be exploited to achieve local privilege escalation. When route4_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free. We recommend upgrading past commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8.
Aliases
Aliases
CVE-2023-4206


To clipboard 

{
  "GSD": {
    "alias": "CVE-2023-4206",
    "id": "GSD-2023-4206"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-4206"
      ],
      "details": "A use-after-free vulnerability in the Linux kernel\u0027s net/sched: cls_route component can be exploited to achieve local privilege escalation.\n\nWhen route4_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free.\n\nWe recommend upgrading past commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8.\n\n",
      "id": "GSD-2023-4206",
      "modified": "2023-12-13T01:20:27.248604Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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        "ID": "CVE-2023-4206",
        "STATE": "PUBLIC"
      },
      "affects": {
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          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Kernel",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "3.18",
                          "version_value": "6.5"
                        }
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                    }
                  }
                ]
              },
              "vendor_name": "Linux"
            }
          ]
        }
      },
      "credits": [
        {
          "lang": "en",
          "value": "valis"
        },
        {
          "lang": "en",
          "value": "Bing-Jhong Billy Jheng"
        }
      ],
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      "description": {
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            "value": "A use-after-free vulnerability in the Linux kernel\u0027s net/sched: cls_route component can be exploited to achieve local privilege escalation.\n\nWhen route4_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free.\n\nWe recommend upgrading past commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8.\n\n"
          }
        ]
      },
      "generator": {
        "engine": "Vulnogram 0.1.0-dev"
      },
      "impact": {
        "cvss": [
          {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "cweId": "CWE-416",
                "lang": "eng",
                "value": "CWE-416 Use After Free"
              }
            ]
          }
        ]
      },
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            "name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8",
            "refsource": "MISC",
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8"
          },
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            "name": "https://kernel.dance/b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8",
            "refsource": "MISC",
            "url": "https://kernel.dance/b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8"
          },
          {
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            "url": "https://www.debian.org/security/2023/dsa-5492"
          },
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            "refsource": "MISC",
            "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html"
          }
        ]
      },
      "source": {
        "discovery": "EXTERNAL"
      }
    },
    "nvd.nist.gov": {
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        ],
        "descriptions": [
          {
            "lang": "en",
            "value": "A use-after-free vulnerability in the Linux kernel\u0027s net/sched: cls_route component can be exploited to achieve local privilege escalation.\n\nWhen route4_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free.\n\nWe recommend upgrading past commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8.\n\n"
          },
          {
            "lang": "es",
            "value": "Una vulnerabilidad de use-after-free en el componente net/sched: cls_route del kernel de Linux se puede explotar para lograr una escalada de privilegios local. Cuando se llama a route4_change() en un filtro existente, toda la estructura tcf_result siempre se copia en la nueva instancia del filtro. Esto causa un problema al actualizar un filtro vinculado a una clase, ya que siempre se llama a tcf_unbind_filter() en la instancia anterior en la ruta exitosa, lo que disminuye filter_cnt de la clase a la que todav\u00eda se hace referencia y permite que se elimine, lo que lleva a un use-after-free. Recomendamos actualizar al commit anterior b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8."
          }
        ],
        "id": "CVE-2023-4206",
        "lastModified": "2024-02-15T15:57:06.697",
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                "attackVector": "LOCAL",
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                "baseScore": 7.8,
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                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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        "published": "2023-09-06T14:15:11.280",
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    }
  }
}


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