Use After Free Affecting python3-hivex package, versions <0:1.3.18-23.module+el8.9.0+18724+20190c23


Severity

Recommended
medium

Based on CentOS security rating.

Threat Intelligence

EPSS
0.13% (48th percentile)

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  • Snyk IDSNYK-CENTOS8-PYTHON3HIVEX-6059153
  • published15 Nov 2023
  • disclosed26 Aug 2020

Introduced: 26 Aug 2020

CVE-2021-3750  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Centos:8 python3-hivex to version 0:1.3.18-23.module+el8.9.0+18724+20190c23 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-hivex package and not the python3-hivex package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted content may be written to the controller's registers and trigger undesirable actions (such as reset) while the device is still transferring packets. This can ultimately lead to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition, or potentially execute arbitrary code within the context of the QEMU process on the host. This flaw affects QEMU versions before 7.0.0.

CVSS Scores

version 3.1