Out-of-bounds Write Affecting qemu-project/qemu package, versions [,5.0)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.05% (17th percentile)

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  • Snyk IDSNYK-UNMANAGED-QEMUPROJECTQEMU-3007187
  • published26 Jan 2022
  • disclosed13 May 2021
  • creditUnknown

Introduced: 13 May 2021

CVE-2021-20221  (opens in a new tab)
CWE-125  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade qemu-project/qemu to version 5.0 or higher.

Overview

Affected versions of this package are vulnerable to Out-of-bounds Write. An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.

CVSS Scores

version 3.1