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[email protected]CVE-2021-20196

HistoryMay 26, 2021 - 10:15 p.m.

CVE-2021-20196

2021-05-2622:15:07

CWE-476

[email protected]

web.nvd.nist.gov

188

qemu

floppy disk emulator

null pointer dereference

denial of service

nvd

cve-2021-20196

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:N/I:N/A:P

CVSS3

6.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

AI Score

6.1

Confidence

High

EPSS

0.001

Percentile

23.5%

JSON

A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while processing read/write ioport commands if the selected floppy drive is not initialized with a block device. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Affected configurations

Vulners

NVD

Node

qemuqemuRange≤5.2.0

VendorProductVersionCPE
qemuqemu*cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
qemu	qemu	*	cpe:2.3:a:qemu:qemu::::::::

CNA Affected

[
  {
    "product": "qemu",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "vulnerable up to (including) qemu 5.2.0"
      }
    ]
  }
]