CVE-2021-3527

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.

Link	Resource
https://www.openwall.com/lists/oss-security/2021/05/05/5	Mailing List Patch
https://gitlab.com/qemu-project/qemu/-/commit/05a40b172e4d691371534828078be47e7fff524c	Patch Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1955695	Issue Tracking Patch
https://gitlab.com/qemu-project/qemu/-/commit/7ec54f9eb62b5d177e30eb8b1cad795a5f8d8986	Patch Third Party Advisory
https://security.netapp.com/advisory/ntap-20210708-0008/	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00000.html	Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202208-27	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html	Mailing List Third Party Advisory

Configuration 1

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:* cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:* cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

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Published : 2021-05-26 10:15

Updated : 2022-09-30 03:10

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NVD link : CVE-2021-3527

Mitre link : CVE-2021-3527

No products.

CWE-770