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Debian: CVE-2021-3527: qemu -- security update

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Debian: CVE-2021-3527: qemu -- security update

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:N/I:N/A:P)
Published
05/26/2021
Created
09/08/2021
Added
09/07/2021
Modified
09/07/2021

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.

Solution(s)

  • debian-upgrade-qemu

References

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