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CVE-2021-3527

UNKNOWN
Published 2021-05-26T21:13:56
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No CVSS data available

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed MODERATE

GHSA-fwv2-775h-qv4v

Advisory 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.

CVSS Scoring

CVSS Score

5.0

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-3527
WEB https://bugzilla.redhat.com/show_bug.cgi?id=1955695
WEB https://gitlab.com/qemu-project/qemu/-/commit/05a40b172e4d691371534828078be47e7fff524c
WEB https://gitlab.com/qemu-project/qemu/-/commit/7ec54f9eb62b5d177e30eb8b1cad795a5f8d8986
WEB https://lists.debian.org/debian-lts-announce/2021/09/msg00000.html
WEB https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
WEB https://security.gentoo.org/glsa/202208-27
WEB https://security.netapp.com/advisory/ntap-20210708-0008
WEB https://www.openwall.com/lists/oss-security/2021/05/05/5

Advisory provided by GitHub Security Advisory Database. Published: May 24, 2022, Modified: August 16, 2022

References

https://bugzilla.redhat.com/show_bug.cgi?id=1955695
https://www.openwall.com/lists/oss-security/2021/05/05/5
https://gitlab.com/qemu-project/qemu/-/commit/7ec54f9eb62b5d177e30eb8b1cad795a5f8d8986
https://gitlab.com/qemu-project/qemu/-/commit/05a40b172e4d691371534828078be47e7fff524c
https://security.netapp.com/advisory/ntap-20210708-0008/
https://lists.debian.org/debian-lts-announce/2021/09/msg00000.html
https://security.gentoo.org/glsa/202208-27
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
Published: 2021-05-26T21:13:56
Last Modified: 2024-08-03T17:01:07.589Z
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