gsd-2021-33909
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05.
Aliases
Aliases
CVE-2021-33909


To clipboard 

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    "alias": "CVE-2021-33909",
    "description": "fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05.",
    "id": "GSD-2021-33909",
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      "https://access.redhat.com/errata/RHSA-2021:2737",
      "https://access.redhat.com/errata/RHSA-2021:2736",
      "https://access.redhat.com/errata/RHSA-2021:2735",
      "https://access.redhat.com/errata/RHSA-2021:2734",
      "https://access.redhat.com/errata/RHSA-2021:2733",
      "https://access.redhat.com/errata/RHSA-2021:2732",
      "https://access.redhat.com/errata/RHSA-2021:2731",
      "https://access.redhat.com/errata/RHSA-2021:2730",
      "https://access.redhat.com/errata/RHSA-2021:2729",
      "https://access.redhat.com/errata/RHSA-2021:2728",
      "https://access.redhat.com/errata/RHSA-2021:2727",
      "https://access.redhat.com/errata/RHSA-2021:2726",
      "https://access.redhat.com/errata/RHSA-2021:2725",
      "https://access.redhat.com/errata/RHSA-2021:2723",
      "https://access.redhat.com/errata/RHSA-2021:2722",
      "https://access.redhat.com/errata/RHSA-2021:2720",
      "https://access.redhat.com/errata/RHSA-2021:2719",
      "https://access.redhat.com/errata/RHSA-2021:2718",
      "https://access.redhat.com/errata/RHSA-2021:2716",
      "https://access.redhat.com/errata/RHSA-2021:2715",
      "https://access.redhat.com/errata/RHSA-2021:2714",
      "https://ubuntu.com/security/CVE-2021-33909",
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      "https://linux.oracle.com/cve/CVE-2021-33909.html",
      "https://packetstormsecurity.com/files/cve/CVE-2021-33909"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
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        "CVE-2021-33909"
      ],
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      "id": "GSD-2021-33909",
      "modified": "2023-12-13T01:23:19.096724Z",
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    }
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      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 7.2,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 10.0,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": false
        },
        "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": "2023-03-01T20:14Z",
      "publishedDate": "2021-07-20T19:15Z"
    }
  }
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.