gsd-2021-3748
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.
Aliases
Aliases
CVE-2021-3748


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-3748",
    "description": "A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor\u0027s address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.",
    "id": "GSD-2021-3748",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-3748.html",
      "https://www.debian.org/security/2021/dsa-4980",
      "https://access.redhat.com/errata/RHSA-2021:5036",
      "https://access.redhat.com/errata/RHSA-2021:4112",
      "https://ubuntu.com/security/CVE-2021-3748",
      "https://security.archlinux.org/CVE-2021-3748",
      "https://linux.oracle.com/cve/CVE-2021-3748.html",
      "https://access.redhat.com/errata/RHSA-2022:1759"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-3748"
      ],
      "details": "A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor\u0027s address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.",
      "id": "GSD-2021-3748",
      "modified": "2023-12-13T01:23:35.295560Z",
      "schema_version": "1.4.0"
    }
  },
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          }
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      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 6.9,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 3.4,
          "impactScore": 10.0,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
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            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 0.8,
          "impactScore": 6.0
        }
      },
      "lastModifiedDate": "2023-01-03T15:16Z",
      "publishedDate": "2022-03-23T20:15Z"
    }
  }
}


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