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
{
"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"
}
},
"namespaces": {
"cve.org": {
"CVE_data_meta": {
"ASSIGNER": "secalert@redhat.com",
"ID": "CVE-2021-3748",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "QEMU (virtio-net)",
"version": {
"version_data": [
{
"version_value": "Affects qemu v0.10.0 and above, Fixed In \u2013 v6.2.0-rc0 and above."
}
]
}
}
]
},
"vendor_name": "n/a"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "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."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-416 - Use After Free"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://bugzilla.redhat.com/show_bug.cgi?id=1998514",
"refsource": "MISC",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1998514"
},
{
"name": "https://ubuntu.com/security/CVE-2021-3748",
"refsource": "MISC",
"url": "https://ubuntu.com/security/CVE-2021-3748"
},
{
"name": "https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6",
"refsource": "MISC",
"url": "https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6"
},
{
"name": "https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html",
"refsource": "MISC",
"url": "https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html"
},
{
"name": "[debian-lts-announce] 20220404 [SECURITY] [DLA 2970-1] qemu security update",
"refsource": "MLIST",
"url": "https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html"
},
{
"name": "https://security.netapp.com/advisory/ntap-20220425-0004/",
"refsource": "CONFIRM",
"url": "https://security.netapp.com/advisory/ntap-20220425-0004/"
},
{
"name": "GLSA-202208-27",
"refsource": "GENTOO",
"url": "https://security.gentoo.org/glsa/202208-27"
},
{
"name": "[debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security update",
"refsource": "MLIST",
"url": "https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html"
}
]
}
},
"nvd.nist.gov": {
"configurations": {
"CVE_data_version": "4.0",
"nodes": [
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*",
"cpe_name": [],
"versionEndExcluding": "6.2.0",
"versionStartIncluding": "0.10.0",
"vulnerable": true
}
],
"operator": "OR"
},
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
}
],
"operator": "OR"
},
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
"cpe_name": [],
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*",
"cpe_name": [],
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
}
],
"operator": "OR"
},
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
}
],
"operator": "OR"
},
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*",
"cpe_name": [],
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_advanced_virtualization_eus:8.4:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
}
],
"operator": "OR"
}
]
},
"cve": {
"CVE_data_meta": {
"ASSIGNER": "secalert@redhat.com",
"ID": "CVE-2021-3748"
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "en",
"value": "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."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "en",
"value": "CWE-416"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6",
"refsource": "MISC",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6"
},
{
"name": "https://ubuntu.com/security/CVE-2021-3748",
"refsource": "MISC",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://ubuntu.com/security/CVE-2021-3748"
},
{
"name": "https://bugzilla.redhat.com/show_bug.cgi?id=1998514",
"refsource": "MISC",
"tags": [
"Issue Tracking",
"Patch",
"Third Party Advisory"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1998514"
},
{
"name": "https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html",
"refsource": "MISC",
"tags": [
"Mailing List",
"Patch",
"Third Party Advisory"
],
"url": "https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html"
},
{
"name": "[debian-lts-announce] 20220404 [SECURITY] [DLA 2970-1] qemu security update",
"refsource": "MLIST",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html"
},
{
"name": "https://security.netapp.com/advisory/ntap-20220425-0004/",
"refsource": "CONFIRM",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20220425-0004/"
},
{
"name": "GLSA-202208-27",
"refsource": "GENTOO",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/202208-27"
},
{
"name": "[debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security update",
"refsource": "MLIST",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html"
}
]
}
},
"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": {
"cvssV3": {
"attackComplexity": "HIGH",
"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"
}
}
}
Loading…
Loading…
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.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- 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.
Loading…
Loading…