GSD-2023-0240

Vulnerability from gsd - Updated: 2023-12-13 01:20
Details
There is a logic error in io_uring's implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation. In the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161.
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Aliases
CVE-2023-0240
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{
  "GSD": {
    "alias": "CVE-2023-0240",
    "id": "GSD-2023-0240"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-0240"
      ],
      "details": "There is a logic error in io_uring\u0027s implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation. In the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161.",
      "id": "GSD-2023-0240",
      "modified": "2023-12-13T01:20:22.753013Z",
      "schema_version": "1.4.0"
    }
  },
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        "ID": "CVE-2023-0240",
        "STATE": "PUBLIC"
      },
      "affects": {
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          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Linux Kernel",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "=",
                          "version_value": "5.10"
                        }
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                    }
                  }
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              },
              "vendor_name": "Linux"
            }
          ]
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      "credits": [
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          "value": "Bing-Jhong Billy Jheng of Starlabs"
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            "value": "There is a logic error in io_uring\u0027s implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation. In the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161."
          }
        ]
      },
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            "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"
          }
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            "description": [
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                "cweId": "CWE-416",
                "lang": "eng",
                "value": "CWE-416 Use After Free"
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        ]
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            "name": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y\u0026id=788d0824269bef539fe31a785b1517882eafed93",
            "refsource": "MISC",
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y\u0026id=788d0824269bef539fe31a785b1517882eafed93"
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            "url": "https://github.com/gregkh/linux/commit/1e6fa5216a0e59ef02e8b6b40d553238a3b81d49"
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            "name": "https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93",
            "refsource": "MISC",
            "url": "https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93"
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        ]
      },
      "source": {
        "discovery": "EXTERNAL"
      }
    },
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        "nodes": [
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            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "5.10",
                "vulnerable": true
              }
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        "description": {
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            {
              "lang": "en",
              "value": "There is a logic error in io_uring\u0027s implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation. In the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161."
            }
          ]
        },
        "problemtype": {
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            {
              "description": [
                {
                  "lang": "en",
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          "reference_data": [
            {
              "name": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y\u0026id=788d0824269bef539fe31a785b1517882eafed93",
              "refsource": "MISC",
              "tags": [
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                "Patch",
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              "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y\u0026id=788d0824269bef539fe31a785b1517882eafed93"
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              "url": "https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93"
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      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "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"
          },
          "exploitabilityScore": 1.8,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2023-02-06T21:48Z",
      "publishedDate": "2023-01-30T14:15Z"
    }
  }
}



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