An out-of-bounds read/write access flaw was found in the USB emulator of the QEMU in versions before 5.2.0. This issue occurs while processing USB packets from a guest when USBDevice 'setup_len' exceeds its 'data_buf[4096]' in the do_token_in, do_token_out routines. This flaw allows a guest user to crash the QEMU process, resulting in a denial of service, or the potential execution of arbitrary code with the privileges of the QEMU process on the host.
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00024.html
https://bugzilla.redhat.com/show_bug.cgi?id=1869201
https://lists.debian.org/debian-lts-announce/2020/09/msg00013.html
https://security.gentoo.org/glsa/202009-14
https://security.gentoo.org/glsa/202011-09
https://security.netapp.com/advisory/ntap-20200924-0006/
https://usn.ubuntu.com/4511-1/
https://www.debian.org/security/2020/dsa-4760
Source: MITRE
Published: 2020-08-31
Updated: 2020-11-11
Type: CWE-787
Base Score: 4.4
Vector: AV:L/AC:M/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 3.4
Severity: MEDIUM
Base Score: 5
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L
Impact Score: 3.7
Exploitability Score: 0.8
Severity: MEDIUM