ghsa-fwv2-775h-qv4v
Vulnerability from github
Published
2022-05-24 19:03
Modified
2022-08-16 00:00
Severity ?
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.
{ "affected": [], "aliases": [ "CVE-2021-3527" ], "database_specific": { "cwe_ids": [ "CWE-770" ], "github_reviewed": false, "github_reviewed_at": null, "nvd_published_at": "2021-05-26T22:15:00Z", "severity": "MODERATE" }, "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.", "id": "GHSA-fwv2-775h-qv4v", "modified": "2022-08-16T00:00:42Z", "published": "2022-05-24T19:03:32Z", "references": [ { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3527" }, { "type": "WEB", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1955695" }, { "type": "WEB", "url": "https://gitlab.com/qemu-project/qemu/-/commit/05a40b172e4d691371534828078be47e7fff524c" }, { "type": "WEB", "url": "https://gitlab.com/qemu-project/qemu/-/commit/7ec54f9eb62b5d177e30eb8b1cad795a5f8d8986" }, { "type": "WEB", "url": "https://lists.debian.org/debian-lts-announce/2021/09/msg00000.html" }, { "type": "WEB", "url": "https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html" }, { "type": "WEB", "url": "https://security.gentoo.org/glsa/202208-27" }, { "type": "WEB", "url": "https://security.netapp.com/advisory/ntap-20210708-0008" }, { "type": "WEB", "url": "https://www.openwall.com/lists/oss-security/2021/05/05/5" } ], "schema_version": "1.4.0", "severity": [ { "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "type": "CVSS_V3" } ] }
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Sightings
Author | Source | Type | Date |
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Nomenclature
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- 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.