fkie_cve-2022-48987
Vulnerability from fkie_nvd
Published
2024-10-21 20:15
Modified
2024-11-01 15:27
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: media: v4l2-dv-timings.c: fix too strict blanking sanity checks Sanity checks were added to verify the v4l2_bt_timings blanking fields in order to avoid integer overflows when userspace passes weird values. But that assumed that userspace would correctly fill in the front porch, backporch and sync values, but sometimes all you know is the total blanking, which is then assigned to just one of these fields. And that can fail with these checks. So instead set a maximum for the total horizontal and vertical blanking and check that each field remains below that. That is still sufficient to avoid integer overflows, but it also allows for more flexibility in how userspace fills in these fields.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0d73b49c4037199472b29574ae21c21aef493971Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2572ab14b73aa45b6ae7e4c089ccf119fed5cf89Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/32f01f0306a98629508f84d7ef0d1d037bc274a2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4afc77068e36cee45b39d4fdc7513de26980f72cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5eef2141776da02772c44ec406d6871a790761eePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6fb8bc29bfa80707994a63cc97e2f9920e0b0608Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a2b56627c0d13009e02f6f2c0206c0451ed19a0ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d3d14cdf1c7ae2caa3e999bae95ba99e955fb7c3Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1EA5E6E0-F60E-4B95-AE97-C3027AA27388",
              "versionEndExcluding": "4.9.336",
              "versionStartIncluding": "4.9.332",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8951F556-AF07-4129-996D-5BB44778FC95",
              "versionEndExcluding": "4.14.302",
              "versionStartIncluding": "4.14.298",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "74A39CCD-7EBA-4ED1-A24C-C1C0F8902BDD",
              "versionEndExcluding": "4.19.269",
              "versionStartIncluding": "4.19.264",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "72E8F2FD-FA28-4184-BEFD-92915760FB87",
              "versionEndExcluding": "5.4.227",
              "versionStartIncluding": "5.4.226",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F188CD3F-F2C5-4C45-A3C3-B105BFD832E5",
              "versionEndExcluding": "5.10.159",
              "versionStartIncluding": "5.10.153",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "60E56598-983B-4E47-B87D-9B08693E8368",
              "versionEndExcluding": "5.15.83",
              "versionStartIncluding": "5.15.77",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "143D804C-0BEB-4434-B48B-1CA625157A7C",
              "versionEndExcluding": "6.0.13",
              "versionStartIncluding": "6.0.7",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: v4l2-dv-timings.c: fix too strict blanking sanity checks\n\nSanity checks were added to verify the v4l2_bt_timings blanking fields\nin order to avoid integer overflows when userspace passes weird values.\n\nBut that assumed that userspace would correctly fill in the front porch,\nbackporch and sync values, but sometimes all you know is the total\nblanking, which is then assigned to just one of these fields.\n\nAnd that can fail with these checks.\n\nSo instead set a maximum for the total horizontal and vertical\nblanking and check that each field remains below that.\n\nThat is still sufficient to avoid integer overflows, but it also\nallows for more flexibility in how userspace fills in these fields."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: media: v4l2-dv-timings.c: se corrigen comprobaciones de cordura de borrado demasiado estrictas Se a\u00f1adieron comprobaciones de cordura para verificar los campos de borrado de v4l2_bt_timings para evitar desbordamientos de enteros cuando el espacio de usuario pasa valores extra\u00f1os. Pero eso supon\u00eda que el espacio de usuario rellenar\u00eda correctamente los valores de front porch, back porch y sync, pero a veces todo lo que sabes es el borrado total, que luego se asigna a solo uno de estos campos. Y eso puede fallar con estas comprobaciones. As\u00ed que, en su lugar, establece un m\u00e1ximo para el borrado horizontal y vertical total y comprueba que cada campo permanezca por debajo de eso. Eso sigue siendo suficiente para evitar desbordamientos de enteros, pero tambi\u00e9n permite m\u00e1s flexibilidad en c\u00f3mo el espacio de usuario rellena estos campos."
    }
  ],
  "id": "CVE-2022-48987",
  "lastModified": "2024-11-01T15:27:26.880",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-10-21T20:15:10.617",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/0d73b49c4037199472b29574ae21c21aef493971"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/2572ab14b73aa45b6ae7e4c089ccf119fed5cf89"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/32f01f0306a98629508f84d7ef0d1d037bc274a2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/4afc77068e36cee45b39d4fdc7513de26980f72c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/5eef2141776da02772c44ec406d6871a790761ee"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/6fb8bc29bfa80707994a63cc97e2f9920e0b0608"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a2b56627c0d13009e02f6f2c0206c0451ed19a0e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d3d14cdf1c7ae2caa3e999bae95ba99e955fb7c3"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.