msrc_cve-2021-3929
Vulnerability from csaf_microsoft
Published
2022-08-02 00:00
Modified
2024-09-11 00:00
Summary
A DMA reentrancy issue was found in the NVM Express Controller (NVME) emulation in QEMU. This CVE is similar to CVE-2021-3750 and just like it when the reentrancy write triggers the reset function nvme_ctrl_reset() data structs will be freed leading to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host resulting in a denial of service condition or potentially executing arbitrary code within the context of the QEMU process on the host.
Notes
Additional Resources
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer
The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
{
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"title": "Additional Resources"
},
{
"category": "legal_disclaimer",
"text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
"title": "Disclaimer"
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"publisher": {
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"contact_details": "secure@microsoft.com",
"name": "Microsoft Security Response Center",
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"references": [
{
"category": "self",
"summary": "CVE-2021-3929 A DMA reentrancy issue was found in the NVM Express Controller (NVME) emulation in QEMU. This CVE is similar to CVE-2021-3750 and just like it when the reentrancy write triggers the reset function nvme_ctrl_reset() data structs will be freed leading to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host resulting in a denial of service condition or potentially executing arbitrary code within the context of the QEMU process on the host. - VEX",
"url": "https://msrc.microsoft.com/csaf/vex/2022/msrc_cve-2021-3929.json"
},
{
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{
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"url": "https://www.first.org/cvss"
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],
"title": "A DMA reentrancy issue was found in the NVM Express Controller (NVME) emulation in QEMU. This CVE is similar to CVE-2021-3750 and just like it when the reentrancy write triggers the reset function nvme_ctrl_reset() data structs will be freed leading to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host resulting in a denial of service condition or potentially executing arbitrary code within the context of the QEMU process on the host.",
"tracking": {
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"vulnerabilities": [
{
"cve": "CVE-2021-3929",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"notes": [
{
"category": "general",
"text": "redhat",
"title": "Assigning CNA"
}
],
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"18612-17086",
"18535-17084"
],
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"17086-1",
"17084-2"
]
},
"references": [
{
"category": "self",
"summary": "CVE-2021-3929 A DMA reentrancy issue was found in the NVM Express Controller (NVME) emulation in QEMU. This CVE is similar to CVE-2021-3750 and just like it when the reentrancy write triggers the reset function nvme_ctrl_reset() data structs will be freed leading to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host resulting in a denial of service condition or potentially executing arbitrary code within the context of the QEMU process on the host. - VEX",
"url": "https://msrc.microsoft.com/csaf/vex/2022/msrc_cve-2021-3929.json"
}
],
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"environmentalsScore": 0.0,
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "CHANGED",
"temporalScore": 8.2,
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
"16820-3",
"17086-1",
"17084-2"
]
}
],
"title": "A DMA reentrancy issue was found in the NVM Express Controller (NVME) emulation in QEMU. This CVE is similar to CVE-2021-3750 and just like it when the reentrancy write triggers the reset function nvme_ctrl_reset() data structs will be freed leading to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host resulting in a denial of service condition or potentially executing arbitrary code within the context of the QEMU process on the host."
}
]
}
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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.
- 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.
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