Rapid7 Vulnerability & Exploit Database

Ubuntu: USN-4725-1 (CVE-2020-27821): QEMU vulnerabilities

Back to Search

Ubuntu: USN-4725-1 (CVE-2020-27821): QEMU vulnerabilities

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:N/I:N/A:P)
Published
12/08/2020
Created
02/11/2021
Added
02/09/2021
Modified
07/16/2021

Description

A flaw was found in the memory management API of QEMU during the initialization of a memory region cache. This issue could lead to an out-of-bounds write access to the MSI-X table while performing MMIO operations. A guest user may abuse this flaw to crash the QEMU process on the host, resulting in a denial of service. This flaw affects QEMU versions prior to 5.2.0.

Solution(s)

  • ubuntu-upgrade-qemu-system
  • ubuntu-upgrade-qemu-system-aarch64
  • ubuntu-upgrade-qemu-system-arm
  • ubuntu-upgrade-qemu-system-mips
  • ubuntu-upgrade-qemu-system-misc
  • ubuntu-upgrade-qemu-system-ppc
  • ubuntu-upgrade-qemu-system-s390x
  • ubuntu-upgrade-qemu-system-sparc
  • ubuntu-upgrade-qemu-system-x86
  • ubuntu-upgrade-qemu-system-x86-microvm
  • ubuntu-upgrade-qemu-system-x86-xen

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;