gsd-2020-28974
Vulnerability from gsd
Modified
2023-12-13 01:22
Details
A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height.
Aliases
Aliases
CVE-2020-28974


To clipboard 

{
  "GSD": {
    "alias": "CVE-2020-28974",
    "description": "A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height.",
    "id": "GSD-2020-28974",
    "references": [
      "https://www.suse.com/security/cve/CVE-2020-28974.html",
      "https://access.redhat.com/errata/RHSA-2021:1739",
      "https://access.redhat.com/errata/RHSA-2021:1578",
      "https://ubuntu.com/security/CVE-2020-28974",
      "https://advisories.mageia.org/CVE-2020-28974.html",
      "https://security.archlinux.org/CVE-2020-28974",
      "https://alas.aws.amazon.com/cve/html/CVE-2020-28974.html",
      "https://linux.oracle.com/cve/CVE-2020-28974.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-28974"
      ],
      "details": "A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height.",
      "id": "GSD-2020-28974",
      "modified": "2023-12-13T01:22:01.874928Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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        "ID": "CVE-2020-28974",
        "STATE": "PUBLIC"
      },
      "affects": {
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                    "version": {
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          }
        ]
      },
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          {
            "name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c4e0dff2095c579b142d5a0693257f1c58b4804",
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            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c4e0dff2095c579b142d5a0693257f1c58b4804"
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          },
          {
            "name": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7",
            "refsource": "MISC",
            "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7"
          },
          {
            "name": "[oss-security] 20201124 Re: Linux kernel slab-out-of-bounds Read in fbcon",
            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2020/11/25/1"
          },
          {
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            "refsource": "MLIST",
            "url": "https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html"
          },
          {
            "name": "[debian-lts-announce] 20201218 [SECURITY] [DLA 2494-1] linux security update",
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          },
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            "refsource": "CONFIRM",
            "url": "https://security.netapp.com/advisory/ntap-20210108-0003/"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "5.9.7",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
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          "ID": "CVE-2020-28974"
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        "description": {
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            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-125"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://seclists.org/oss-sec/2020/q4/104",
              "refsource": "MISC",
              "tags": [
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              "url": "https://seclists.org/oss-sec/2020/q4/104"
            },
            {
              "name": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7",
              "refsource": "MISC",
              "tags": [
                "Release Notes",
                "Vendor Advisory"
              ],
              "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7"
            },
            {
              "name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c4e0dff2095c579b142d5a0693257f1c58b4804",
              "refsource": "MISC",
              "tags": [
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              "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c4e0dff2095c579b142d5a0693257f1c58b4804"
            },
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              "name": "[oss-security] 20201124 Re: Linux kernel slab-out-of-bounds Read in fbcon",
              "refsource": "MLIST",
              "tags": [
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                "Third Party Advisory"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2020/11/25/1"
            },
            {
              "name": "[debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update",
              "refsource": "MLIST",
              "tags": [
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              "url": "https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html"
            },
            {
              "name": "[debian-lts-announce] 20201218 [SECURITY] [DLA 2494-1] linux security update",
              "refsource": "MLIST",
              "tags": [
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              "url": "https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20210108-0003/",
              "refsource": "CONFIRM",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://security.netapp.com/advisory/ntap-20210108-0003/"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 6.1,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 8.5,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "PHYSICAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.0,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 0.3,
          "impactScore": 4.7
        }
      },
      "lastModifiedDate": "2021-01-27T19:44Z",
      "publishedDate": "2020-11-20T18:15Z"
    }
  }
}


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