gsd-2021-20196
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
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.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-20196",
"description": "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.",
"id": "GSD-2021-20196",
"references": [
"https://www.suse.com/security/cve/CVE-2021-20196.html",
"https://access.redhat.com/errata/RHSA-2022:0397",
"https://access.redhat.com/errata/RHSA-2022:0325",
"https://ubuntu.com/security/CVE-2021-20196",
"https://security.archlinux.org/CVE-2021-20196",
"https://linux.oracle.com/cve/CVE-2021-20196.html",
"https://access.redhat.com/errata/RHSA-2022:1759"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
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],
"details": "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.",
"id": "GSD-2021-20196",
"modified": "2023-12-13T01:23:12.537302Z",
"schema_version": "1.4.0"
}
},
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},
"affects": {
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{
"product": {
"product_data": [
{
"product_name": "qemu",
"version": {
"version_data": [
{
"version_affected": "=",
"version_value": "vulnerable up to (including) qemu 5.2.0"
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}
]
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},
{
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"url": "https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html"
},
{
"name": "https://security.netapp.com/advisory/ntap-20210708-0004/",
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},
"nvd.nist.gov": {
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"nodes": [
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"cpe_name": [],
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"problemtype": {
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"references": {
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},
{
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{
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},
{
"name": "[debian-lts-announce] 20220404 [SECURITY] [DLA 2970-1] qemu security update",
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"url": "https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html"
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{
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"refsource": "MLIST",
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},
"impact": {
"baseMetricV2": {
"acInsufInfo": false,
"cvssV2": {
"accessComplexity": "LOW",
"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 2.1,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 3.9,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "LOW",
"userInteractionRequired": false
},
"baseMetricV3": {
"cvssV3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.0,
"impactScore": 4.0
}
},
"lastModifiedDate": "2023-02-12T22:15Z",
"publishedDate": "2021-05-26T22:15Z"
}
}
}
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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.