gsd-2021-3527
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a single, large transfer request, to reduce the overhead and improve performance. The combined size of the bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a denial of service.
Aliases
Aliases
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"GSD": {
"alias": "CVE-2021-3527",
"description": "A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a single, large transfer request, to reduce the overhead and improve performance. The combined size of the bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a denial of service.",
"id": "GSD-2021-3527",
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"https://www.suse.com/security/cve/CVE-2021-3527.html",
"https://ubuntu.com/security/CVE-2021-3527",
"https://security.archlinux.org/CVE-2021-3527",
"https://linux.oracle.com/cve/CVE-2021-3527.html"
]
},
"gsd": {
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"remediation": "unknown",
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"modified": "2023-12-13T01:23:34.224978Z",
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"impact": {
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"accessVector": "LOCAL",
"authentication": "NONE",
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"baseScore": 2.1,
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"vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
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"scope": "UNCHANGED",
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},
"lastModifiedDate": "2022-09-30T15:10Z",
"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.
- 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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